Track Usage Metrics in Chat API. Track Running Cost, Accuracy in Evals (#985)

- Track, return cost and usage metrics in chat api response
  Track input, output token usage and cost of interactions with 
  openai, anthropic and google chat models for each call to the khoj chat api
- Collect, display and store costs & accuracy of eval run currently in progress
  This provides more insight into eval runs during execution 
  instead of having to wait until the eval run completes.

.github/workflows/run_evals.yml

@@ -1,9 +1,10 @@
-name: Run Khoj Evals
+name: eval
 
 on:
-  # Run on every releases
+  # Run on every release
-  release:
+  push:
-    types: [published]
+    tags:
+      - "*"
   # Allow manual triggers from GitHub UI
   workflow_dispatch:
     inputs:
@@ -82,7 +83,7 @@ jobs:
           sed -i 's/dynamic = \["version"\]/version = "${{ steps.hatch.outputs.version }}"/' pyproject.toml
           pip install --upgrade .[dev]
 
-      - name: 📝 Run Evals
+      - name: 📝 Run Eval
         env:
           KHOJ_MODE: ${{ matrix.khoj_mode }}
           SAMPLE_SIZE: ${{ inputs.sample_size }}

src/interface/obsidian/src/chat_view.ts

@@ -945,7 +945,7 @@ export class KhojChatView extends KhojPaneView {
             console.log("Started streaming", new Date());
         } else if (chunk.type === 'end_llm_response') {
             console.log("Stopped streaming", new Date());
-
+        } else if (chunk.type === 'end_response') {
             // Automatically respond with voice if the subscribed user has sent voice message
             if (this.chatMessageState.isVoice && this.setting.userInfo?.is_active)
                 this.textToSpeech(this.chatMessageState.rawResponse);

src/interface/web/app/common/chatFunctions.ts

@@ -133,7 +133,7 @@ export function processMessageChunk(
         console.log(`Started streaming: ${new Date()}`);
     } else if (chunk.type === "end_llm_response") {
         console.log(`Completed streaming: ${new Date()}`);
-
+    } else if (chunk.type === "end_response") {
         // Append any references after all the data has been streamed
         if (codeContext) currentMessage.codeContext = codeContext;
         if (onlineContext) currentMessage.onlineContext = onlineContext;

src/khoj/processor/conversation/anthropic/utils.py

@@ -18,7 +18,7 @@ from khoj.processor.conversation.utils import (
     get_image_from_url,
 )
 from khoj.utils import state
-from khoj.utils.helpers import in_debug_mode, is_none_or_empty
+from khoj.utils.helpers import get_chat_usage_metrics, in_debug_mode, is_none_or_empty
 
 logger = logging.getLogger(__name__)
 
@@ -59,6 +59,7 @@ def anthropic_completion_with_backoff(
     aggregated_response = "{" if response_type == "json_object" else ""
     max_tokens = max_tokens or DEFAULT_MAX_TOKENS_ANTHROPIC
 
+    final_message = None
     model_kwargs = model_kwargs or dict()
     if system_prompt:
         model_kwargs["system"] = system_prompt
@@ -73,6 +74,12 @@ def anthropic_completion_with_backoff(
     ) as stream:
         for text in stream.text_stream:
             aggregated_response += text
+        final_message = stream.get_final_message()
+
+    # Calculate cost of chat
+    input_tokens = final_message.usage.input_tokens
+    output_tokens = final_message.usage.output_tokens
+    tracer["usage"] = get_chat_usage_metrics(model_name, input_tokens, output_tokens, tracer.get("usage"))
 
     # Save conversation trace
     tracer["chat_model"] = model_name
@@ -126,6 +133,7 @@ def anthropic_llm_thread(
         ]
 
         aggregated_response = ""
+        final_message = None
         with client.messages.stream(
             messages=formatted_messages,
             model=model_name,  # type: ignore
@@ -138,6 +146,12 @@ def anthropic_llm_thread(
             for text in stream.text_stream:
                 aggregated_response += text
                 g.send(text)
+            final_message = stream.get_final_message()
+
+        # Calculate cost of chat
+        input_tokens = final_message.usage.input_tokens
+        output_tokens = final_message.usage.output_tokens
+        tracer["usage"] = get_chat_usage_metrics(model_name, input_tokens, output_tokens, tracer.get("usage"))
 
         # Save conversation trace
         tracer["chat_model"] = model_name

src/khoj/processor/conversation/google/utils.py

@@ -25,7 +25,7 @@ from khoj.processor.conversation.utils import (
     get_image_from_url,
 )
 from khoj.utils import state
-from khoj.utils.helpers import in_debug_mode, is_none_or_empty
+from khoj.utils.helpers import get_chat_usage_metrics, in_debug_mode, is_none_or_empty
 
 logger = logging.getLogger(__name__)
 
@@ -68,6 +68,7 @@ def gemini_completion_with_backoff(
         response = chat_session.send_message(formatted_messages[-1]["parts"])
         response_text = response.text
     except StopCandidateException as e:
+        response = None
         response_text, _ = handle_gemini_response(e.args)
         # Respond with reason for stopping
         logger.warning(
@@ -75,6 +76,11 @@ def gemini_completion_with_backoff(
             + f"Last Message by {messages[-1].role}: {messages[-1].content}"
         )
 
+    # Aggregate cost of chat
+    input_tokens = response.usage_metadata.prompt_token_count if response else 0
+    output_tokens = response.usage_metadata.candidates_token_count if response else 0
+    tracer["usage"] = get_chat_usage_metrics(model_name, input_tokens, output_tokens, tracer.get("usage"))
+
     # Save conversation trace
     tracer["chat_model"] = model_name
     tracer["temperature"] = temperature
@@ -146,6 +152,11 @@ def gemini_llm_thread(
             if stopped:
                 raise StopCandidateException(message)
 
+        # Calculate cost of chat
+        input_tokens = chunk.usage_metadata.prompt_token_count
+        output_tokens = chunk.usage_metadata.candidates_token_count
+        tracer["usage"] = get_chat_usage_metrics(model_name, input_tokens, output_tokens, tracer.get("usage"))
+
         # Save conversation trace
         tracer["chat_model"] = model_name
         tracer["temperature"] = temperature

src/khoj/processor/conversation/openai/utils.py

@@ -4,6 +4,8 @@ from threading import Thread
 from typing import Dict
 
 import openai
+from openai.types.chat.chat_completion import ChatCompletion
+from openai.types.chat.chat_completion_chunk import ChatCompletionChunk
 from tenacity import (
     before_sleep_log,
     retry,
@@ -18,7 +20,7 @@ from khoj.processor.conversation.utils import (
     commit_conversation_trace,
 )
 from khoj.utils import state
-from khoj.utils.helpers import in_debug_mode
+from khoj.utils.helpers import get_chat_usage_metrics, in_debug_mode
 
 logger = logging.getLogger(__name__)
 
@@ -63,27 +65,34 @@ def completion_with_backoff(
     if os.getenv("KHOJ_LLM_SEED"):
         model_kwargs["seed"] = int(os.getenv("KHOJ_LLM_SEED"))
 
-    chat = client.chat.completions.create(
+    chat: ChatCompletion | openai.Stream[ChatCompletionChunk] = client.chat.completions.create(
-        stream=stream,
         messages=formatted_messages,  # type: ignore
         model=model,  # type: ignore
+        stream=stream,
+        stream_options={"include_usage": True} if stream else {},
         temperature=temperature,
         timeout=20,
         **(model_kwargs or dict()),
     )
 
-    if not stream:
-        return chat.choices[0].message.content
-
     aggregated_response = ""
-    for chunk in chat:
+    if not stream:
-        if len(chunk.choices) == 0:
+        chunk = chat
-            continue
+        aggregated_response = chunk.choices[0].message.content
-        delta_chunk = chunk.choices[0].delta  # type: ignore
+    else:
-        if isinstance(delta_chunk, str):
+        for chunk in chat:
-            aggregated_response += delta_chunk
+            if len(chunk.choices) == 0:
-        elif delta_chunk.content:
+                continue
-            aggregated_response += delta_chunk.content
+            delta_chunk = chunk.choices[0].delta  # type: ignore
+            if isinstance(delta_chunk, str):
+                aggregated_response += delta_chunk
+            elif delta_chunk.content:
+                aggregated_response += delta_chunk.content
+
+    # Calculate cost of chat
+    input_tokens = chunk.usage.prompt_tokens if hasattr(chunk, "usage") and chunk.usage else 0
+    output_tokens = chunk.usage.completion_tokens if hasattr(chunk, "usage") and chunk.usage else 0
+    tracer["usage"] = get_chat_usage_metrics(model, input_tokens, output_tokens, tracer.get("usage"))
 
     # Save conversation trace
     tracer["chat_model"] = model
@@ -162,10 +171,11 @@ def llm_thread(
         if os.getenv("KHOJ_LLM_SEED"):
             model_kwargs["seed"] = int(os.getenv("KHOJ_LLM_SEED"))
 
-        chat = client.chat.completions.create(
+        chat: ChatCompletion | openai.Stream[ChatCompletionChunk] = client.chat.completions.create(
-            stream=stream,
             messages=formatted_messages,
             model=model_name,  # type: ignore
+            stream=stream,
+            stream_options={"include_usage": True} if stream else {},
             temperature=temperature,
             timeout=20,
             **(model_kwargs or dict()),
@@ -173,7 +183,8 @@ def llm_thread(
 
         aggregated_response = ""
         if not stream:
-            aggregated_response = chat.choices[0].message.content
+            chunk = chat
+            aggregated_response = chunk.choices[0].message.content
             g.send(aggregated_response)
         else:
             for chunk in chat:
@@ -189,6 +200,11 @@ def llm_thread(
                     aggregated_response += text_chunk
                     g.send(text_chunk)
 
+        # Calculate cost of chat
+        input_tokens = chunk.usage.prompt_tokens if hasattr(chunk, "usage") and chunk.usage else 0
+        output_tokens = chunk.usage.completion_tokens if hasattr(chunk, "usage") and chunk.usage else 0
+        tracer["usage"] = get_chat_usage_metrics(model_name, input_tokens, output_tokens, tracer.get("usage"))
+
         # Save conversation trace
         tracer["chat_model"] = model_name
         tracer["temperature"] = temperature

src/khoj/processor/conversation/utils.py

@@ -5,7 +5,6 @@ import math
 import mimetypes
 import os
 import queue
-import re
 import uuid
 from dataclasses import dataclass
 from datetime import datetime
@@ -57,7 +56,7 @@ model_to_prompt_size = {
     "gemini-1.5-flash": 20000,
     "gemini-1.5-pro": 20000,
     # Anthropic Models
-    "claude-3-5-sonnet-20240620": 20000,
+    "claude-3-5-sonnet-20241022": 20000,
     "claude-3-5-haiku-20241022": 20000,
     # Offline Models
     "bartowski/Meta-Llama-3.1-8B-Instruct-GGUF": 20000,
@@ -213,6 +212,8 @@ class ChatEvent(Enum):
     REFERENCES = "references"
     STATUS = "status"
     METADATA = "metadata"
+    USAGE = "usage"
+    END_RESPONSE = "end_response"
 
 
 def message_to_log(

src/khoj/routers/api_chat.py

@@ -667,27 +667,37 @@ async def chat(
             finally:
                 yield event_delimiter
 
-        async def send_llm_response(response: str):
+        async def send_llm_response(response: str, usage: dict = None):
+            # Send Chat Response
             async for result in send_event(ChatEvent.START_LLM_RESPONSE, ""):
                 yield result
             async for result in send_event(ChatEvent.MESSAGE, response):
                 yield result
             async for result in send_event(ChatEvent.END_LLM_RESPONSE, ""):
                 yield result
+            # Send Usage Metadata once llm interactions are complete
+            if usage:
+                async for event in send_event(ChatEvent.USAGE, usage):
+                    yield event
+            async for result in send_event(ChatEvent.END_RESPONSE, ""):
+                yield result
 
         def collect_telemetry():
             # Gather chat response telemetry
             nonlocal chat_metadata
             latency = time.perf_counter() - start_time
             cmd_set = set([cmd.value for cmd in conversation_commands])
+            cost = (tracer.get("usage", {}) or {}).get("cost", 0)
             chat_metadata = chat_metadata or {}
             chat_metadata["conversation_command"] = cmd_set
             chat_metadata["agent"] = conversation.agent.slug if conversation and conversation.agent else None
             chat_metadata["latency"] = f"{latency:.3f}"
             chat_metadata["ttft_latency"] = f"{ttft:.3f}"
+            chat_metadata["usage"] = tracer.get("usage")
 
             logger.info(f"Chat response time to first token: {ttft:.3f} seconds")
             logger.info(f"Chat response total time: {latency:.3f} seconds")
+            logger.info(f"Chat response cost: ${cost:.5f}")
             update_telemetry_state(
                 request=request,
                 telemetry_type="api",
@@ -699,7 +709,7 @@ async def chat(
             )
 
         if is_query_empty(q):
-            async for result in send_llm_response("Please ask your query to get started."):
+            async for result in send_llm_response("Please ask your query to get started.", tracer.get("usage")):
                 yield result
             return
 
@@ -713,7 +723,7 @@ async def chat(
             create_new=body.create_new,
         )
         if not conversation:
-            async for result in send_llm_response(f"Conversation {conversation_id} not found"):
+            async for result in send_llm_response(f"Conversation {conversation_id} not found", tracer.get("usage")):
                 yield result
             return
         conversation_id = conversation.id
@@ -777,7 +787,7 @@ async def chat(
                 await conversation_command_rate_limiter.update_and_check_if_valid(request, cmd)
                 q = q.replace(f"/{cmd.value}", "").strip()
             except HTTPException as e:
-                async for result in send_llm_response(str(e.detail)):
+                async for result in send_llm_response(str(e.detail), tracer.get("usage")):
                     yield result
                 return
 
@@ -834,7 +844,7 @@ async def chat(
             agent_has_entries = await EntryAdapters.aagent_has_entries(agent)
             if len(file_filters) == 0 and not agent_has_entries:
                 response_log = "No files selected for summarization. Please add files using the section on the left."
-                async for result in send_llm_response(response_log):
+                async for result in send_llm_response(response_log, tracer.get("usage")):
                     yield result
             else:
                 async for response in generate_summary_from_files(
@@ -853,7 +863,7 @@ async def chat(
                     else:
                         if isinstance(response, str):
                             response_log = response
-                            async for result in send_llm_response(response):
+                            async for result in send_llm_response(response, tracer.get("usage")):
                                 yield result
 
             await sync_to_async(save_to_conversation_log)(
@@ -880,7 +890,7 @@ async def chat(
                     conversation_config = await ConversationAdapters.aget_default_conversation_config(user)
                 model_type = conversation_config.model_type
                 formatted_help = help_message.format(model=model_type, version=state.khoj_version, device=get_device())
-                async for result in send_llm_response(formatted_help):
+                async for result in send_llm_response(formatted_help, tracer.get("usage")):
                     yield result
                 return
             # Adding specification to search online specifically on khoj.dev pages.
@@ -895,7 +905,7 @@ async def chat(
             except Exception as e:
                 logger.error(f"Error scheduling task {q} for {user.email}: {e}")
                 error_message = f"Unable to create automation. Ensure the automation doesn't already exist."
-                async for result in send_llm_response(error_message):
+                async for result in send_llm_response(error_message, tracer.get("usage")):
                     yield result
                 return
 
@@ -916,7 +926,7 @@ async def chat(
                 raw_query_files=raw_query_files,
                 tracer=tracer,
             )
-            async for result in send_llm_response(llm_response):
+            async for result in send_llm_response(llm_response, tracer.get("usage")):
                 yield result
             return
 
@@ -963,7 +973,7 @@ async def chat(
                     yield result
 
             if conversation_commands == [ConversationCommand.Notes] and not await EntryAdapters.auser_has_entries(user):
-                async for result in send_llm_response(f"{no_entries_found.format()}"):
+                async for result in send_llm_response(f"{no_entries_found.format()}", tracer.get("usage")):
                     yield result
                 return
 
@@ -1105,7 +1115,7 @@ async def chat(
                     "detail": improved_image_prompt,
                     "image": None,
                 }
-                async for result in send_llm_response(json.dumps(content_obj)):
+                async for result in send_llm_response(json.dumps(content_obj), tracer.get("usage")):
                     yield result
                 return
 
@@ -1132,7 +1142,7 @@ async def chat(
                 "inferredQueries": [improved_image_prompt],
                 "image": generated_image,
             }
-            async for result in send_llm_response(json.dumps(content_obj)):
+            async for result in send_llm_response(json.dumps(content_obj), tracer.get("usage")):
                 yield result
             return
 
@@ -1166,7 +1176,7 @@ async def chat(
                         diagram_description = excalidraw_diagram_description
                     else:
                         error_message = "Failed to generate diagram. Please try again later."
-                        async for result in send_llm_response(error_message):
+                        async for result in send_llm_response(error_message, tracer.get("usage")):
                             yield result
 
                         await sync_to_async(save_to_conversation_log)(
@@ -1213,7 +1223,7 @@ async def chat(
                 tracer=tracer,
             )
 
-            async for result in send_llm_response(json.dumps(content_obj)):
+            async for result in send_llm_response(json.dumps(content_obj), tracer.get("usage")):
                 yield result
             return
 
@@ -1252,6 +1262,11 @@ async def chat(
             if item is None:
                 async for result in send_event(ChatEvent.END_LLM_RESPONSE, ""):
                     yield result
+                # Send Usage Metadata once llm interactions are complete
+                async for event in send_event(ChatEvent.USAGE, tracer.get("usage")):
+                    yield event
+                async for result in send_event(ChatEvent.END_RESPONSE, ""):
+                    yield result
                 logger.debug("Finished streaming response")
                 return
             if not connection_alive or not continue_stream:

src/khoj/routers/helpers.py

@@ -1770,6 +1770,7 @@ Manage your automations [here](/automations).
 class MessageProcessor:
     def __init__(self):
         self.references = {}
+        self.usage = {}
         self.raw_response = ""
 
     def convert_message_chunk_to_json(self, raw_chunk: str) -> Dict[str, Any]:
@@ -1793,6 +1794,8 @@ class MessageProcessor:
         chunk_type = ChatEvent(chunk["type"])
         if chunk_type == ChatEvent.REFERENCES:
             self.references = chunk["data"]
+        elif chunk_type == ChatEvent.USAGE:
+            self.usage = chunk["data"]
         elif chunk_type == ChatEvent.MESSAGE:
             chunk_data = chunk["data"]
             if isinstance(chunk_data, dict):
@@ -1837,7 +1840,7 @@ async def read_chat_stream(response_iterator: AsyncGenerator[str, None]) -> Dict
     if buffer:
         processor.process_message_chunk(buffer)
 
-    return {"response": processor.raw_response, "references": processor.references}
+    return {"response": processor.raw_response, "references": processor.references, "usage": processor.usage}
 
 
 def get_user_config(user: KhojUser, request: Request, is_detailed: bool = False):

src/khoj/utils/constants.py

@@ -1,4 +1,5 @@
 from pathlib import Path
+from typing import Dict
 
 app_root_directory = Path(__file__).parent.parent.parent
 web_directory = app_root_directory / "khoj/interface/web/"
@@ -31,3 +32,19 @@ default_config = {
         "image": {"encoder": "sentence-transformers/clip-ViT-B-32", "model_directory": "~/.khoj/search/image/"},
     },
 }
+
+model_to_cost: Dict[str, Dict[str, float]] = {
+    # OpenAI Pricing: https://openai.com/api/pricing/
+    "gpt-4o": {"input": 2.50, "output": 10.00},
+    "gpt-4o-mini": {"input": 0.15, "output": 0.60},
+    "o1-preview": {"input": 15.0, "output": 60.00},
+    "o1-mini": {"input": 3.0, "output": 12.0},
+    # Gemini Pricing: https://ai.google.dev/pricing
+    "gemini-1.5-flash": {"input": 0.075, "output": 0.30},
+    "gemini-1.5-flash-002": {"input": 0.075, "output": 0.30},
+    "gemini-1.5-pro": {"input": 1.25, "output": 5.00},
+    "gemini-1.5-pro-002": {"input": 1.25, "output": 5.00},
+    # Anthropic Pricing: https://www.anthropic.com/pricing#anthropic-api_
+    "claude-3-5-sonnet-20241022": {"input": 3.0, "output": 15.0},
+    "claude-3-5-haiku-20241022": {"input": 1.0, "output": 5.0},
+}

src/khoj/utils/helpers.py

@@ -540,3 +540,27 @@ def get_country_code_from_timezone(tz: str) -> str:
 def get_country_name_from_timezone(tz: str) -> str:
     """Get country name from timezone"""
     return country_names.get(get_country_code_from_timezone(tz), "United States")
+
+
+def get_cost_of_chat_message(model_name: str, input_tokens: int = 0, output_tokens: int = 0, prev_cost: float = 0.0):
+    """
+    Calculate cost of chat message based on input and output tokens
+    """
+
+    # Calculate cost of input and output tokens. Costs are per million tokens
+    input_cost = constants.model_to_cost.get(model_name, {}).get("input", 0) * (input_tokens / 1e6)
+    output_cost = constants.model_to_cost.get(model_name, {}).get("output", 0) * (output_tokens / 1e6)
+
+    return input_cost + output_cost + prev_cost
+
+
+def get_chat_usage_metrics(model_name: str, input_tokens: int = 0, output_tokens: int = 0, usage: dict = {}):
+    """
+    Get usage metrics for chat message based on input and output tokens
+    """
+    prev_usage = usage or {"input_tokens": 0, "output_tokens": 0, "cost": 0.0}
+    return {
+        "input_tokens": prev_usage["input_tokens"] + input_tokens,
+        "output_tokens": prev_usage["output_tokens"] + output_tokens,
+        "cost": get_cost_of_chat_message(model_name, input_tokens, output_tokens, prev_cost=prev_usage["cost"]),
+    }

tests/evals/eval.py

@@ -6,13 +6,15 @@ import os
 import time
 from datetime import datetime
 from io import StringIO
+from textwrap import dedent
+from threading import Lock
 from typing import Any, Dict
 
 import pandas as pd
 import requests
 from datasets import Dataset, load_dataset
 
-from khoj.utils.helpers import is_none_or_empty, timer
+from khoj.utils.helpers import get_cost_of_chat_message, is_none_or_empty, timer
 
 # Configure root logger
 logging.basicConfig(level=logging.INFO, format="%(message)s")
@@ -38,6 +40,28 @@ BATCH_SIZE = int(
 SLEEP_SECONDS = 3 if KHOJ_MODE == "general" else 1  # Sleep between API calls to avoid rate limiting
 
 
+class Counter:
+    """Thread-safe counter for tracking metrics"""
+
+    def __init__(self, value=0.0):
+        self.value = value
+        self.lock = Lock()
+
+    def add(self, amount):
+        with self.lock:
+            self.value += amount
+
+    def get(self):
+        with self.lock:
+            return self.value
+
+
+# Track running metrics while evaluating
+running_cost = Counter()
+running_true_count = Counter(0)
+running_false_count = Counter(0)
+
+
 def load_frames_dataset():
     """
     Load the Google FRAMES benchmark dataset from HuggingFace
@@ -104,25 +128,31 @@ def load_simpleqa_dataset():
         return None
 
 
-def get_agent_response(prompt: str) -> str:
+def get_agent_response(prompt: str) -> Dict[str, Any]:
     """Get response from the Khoj API"""
+    # Set headers
+    headers = {"Content-Type": "application/json"}
+    if not is_none_or_empty(KHOJ_API_KEY):
+        headers["Authorization"] = f"Bearer {KHOJ_API_KEY}"
+
     try:
         response = requests.post(
             KHOJ_CHAT_API_URL,
-            headers={"Content-Type": "application/json", "Authorization": f"Bearer {KHOJ_API_KEY}"},
+            headers=headers,
             json={
                 "q": prompt,
                 "create_new": True,
             },
         )
         response.raise_for_status()
-        return response.json().get("response", "")
+        response_json = response.json()
+        return {"response": response_json.get("response", ""), "usage": response_json.get("usage", {})}
     except Exception as e:
         logger.error(f"Error getting agent response: {e}")
-        return ""
+        return {"response": "", "usage": {}}
 
 
-def evaluate_response(query: str, agent_response: str, ground_truth: str) -> Dict[str, Any]:
+def evaluate_response(query: str, agent_response: str, ground_truth: str) -> tuple[bool | None, str, float]:
     """Evaluate Khoj response against benchmark ground truth using Gemini"""
     evaluation_prompt = f"""
     Compare the following agent response with the ground truth answer.
@@ -147,10 +177,16 @@ def evaluate_response(query: str, agent_response: str, ground_truth: str) -> Dic
             },
         )
         response.raise_for_status()
+        response_json = response.json()
+
+        # Update cost of evaluation
+        input_tokens = response_json["usageMetadata"]["promptTokenCount"]
+        ouput_tokens = response_json["usageMetadata"]["candidatesTokenCount"]
+        cost = get_cost_of_chat_message(GEMINI_EVAL_MODEL, input_tokens, ouput_tokens)
 
         # Parse evaluation response
         eval_response: dict[str, str] = json.loads(
-            clean_json(response.json()["candidates"][0]["content"]["parts"][0]["text"])
+            clean_json(response_json["candidates"][0]["content"]["parts"][0]["text"])
         )
         decision = str(eval_response.get("decision", "")).upper() == "TRUE"
         explanation = eval_response.get("explanation", "")
@@ -158,13 +194,14 @@ def evaluate_response(query: str, agent_response: str, ground_truth: str) -> Dic
         if "503 Service Error" in explanation:
             decision = None
         # Extract decision and explanation from structured response
-        return decision, explanation
+        return decision, explanation, cost
     except Exception as e:
         logger.error(f"Error in evaluation: {e}")
-        return None, f"Evaluation failed: {str(e)}"
+        return None, f"Evaluation failed: {str(e)}", 0.0
 
 
 def process_batch(batch, batch_start, results, dataset_length):
+    global running_cost
     for idx, (prompt, answer, reasoning_type) in enumerate(batch):
         current_index = batch_start + idx
         logger.info(f"Processing example: {current_index}/{dataset_length}")
@@ -173,14 +210,16 @@ def process_batch(batch, batch_start, results, dataset_length):
         prompt = f"/{KHOJ_MODE} {prompt}" if KHOJ_MODE and not prompt.startswith(f"/{KHOJ_MODE}") else prompt
 
         # Get agent response
-        agent_response = get_agent_response(prompt)
+        response = get_agent_response(prompt)
+        agent_response = response["response"]
+        agent_usage = response["usage"]
 
         # Evaluate response
         if is_none_or_empty(agent_response):
             decision = None
             explanation = "Agent response is empty. This maybe due to a service error."
         else:
-            decision, explanation = evaluate_response(prompt, agent_response, answer)
+            decision, explanation, eval_cost = evaluate_response(prompt, agent_response, answer)
 
         # Store results
         results.append(
@@ -192,17 +231,38 @@ def process_batch(batch, batch_start, results, dataset_length):
                 "evaluation_decision": decision,
                 "evaluation_explanation": explanation,
                 "reasoning_type": reasoning_type,
+                "usage": agent_usage,
             }
         )
 
-        # Log results
+        # Update running cost
+        query_cost = float(agent_usage.get("cost", 0.0))
+        running_cost.add(query_cost + eval_cost)
+
+        # Update running accuracy
+        running_accuracy = 0.0
+        if decision is not None:
+            running_true_count.add(1) if decision == True else running_false_count.add(1)
+            running_accuracy = running_true_count.get() / (running_true_count.get() + running_false_count.get())
+
+        ## Log results
         decision_color = {True: "green", None: "blue", False: "red"}[decision]
         colored_decision = color_text(str(decision), decision_color)
-        logger.info(
+        result_to_print = f"""
-            f"Decision: {colored_decision}\nQuestion: {prompt}\nExpected Answer: {answer}\nAgent Answer: {agent_response}\nExplanation: {explanation}\n"
+---------
-        )
+Decision: {colored_decision}
+Accuracy: {running_accuracy:.2%}
+Question: {prompt}
+Expected Answer: {answer}
+Agent Answer: {agent_response}
+Explanation: {explanation}
+Cost: ${running_cost.get():.5f} (Query: ${query_cost:.5f}, Eval: ${eval_cost:.5f})
+---------
+        """
+        logger.info(dedent(result_to_print).lstrip())
 
-        time.sleep(SLEEP_SECONDS)  # Rate limiting
+        # Sleep between API calls to avoid rate limiting
+        time.sleep(SLEEP_SECONDS)
 
 
 def color_text(text, color):
@@ -281,17 +341,18 @@ def main():
         lambda x: (x == True).mean()
     )
 
-    # Print summary
+    # Collect summary
     colored_accuracy = color_text(f"{accuracy:.2%}", "blue")
-    logger.info(f"\nOverall Accuracy: {colored_accuracy}")
+    colored_accuracy_str = f"Overall Accuracy: {colored_accuracy} on {args.dataset.title()} dataset."
-    logger.info(f"\nAccuracy by Reasoning Type:\n{reasoning_type_accuracy}")
+    accuracy_str = f"Overall Accuracy: {accuracy:.2%} on {args.dataset}."
-
+    accuracy_by_reasoning = f"Accuracy by Reasoning Type:\n{reasoning_type_accuracy}"
-    # Save summary to file
+    cost = f"Total Cost: ${running_cost.get():.5f}."
     sample_type = f"Sampling Type: {SAMPLE_SIZE} samples." if SAMPLE_SIZE else "Whole dataset."
     sample_type += " Randomized." if RANDOMIZE else ""
-    summary = (
+    logger.info(f"\n{colored_accuracy_str}\n\n{accuracy_by_reasoning}\n\n{cost}\n\n{sample_type}\n")
-        f"Overall Accuracy: {accuracy:.2%}\n\nAccuracy by Reasoning Type:\n{reasoning_type_accuracy}\n\n{sample_type}\n"
+
-    )
+    # Save summary to file
+    summary = f"{accuracy_str}\n\n{accuracy_by_reasoning}\n\n{cost}\n\n{sample_type}\n"
     summary_file = args.output.replace(".csv", ".txt") if args.output else None
     summary_file = (
         summary_file or f"{args.dataset}_evaluation_summary_{datetime.now().strftime('%Y-%m-%d_%H-%M-%S')}.txt"