Technologies/LangChain/gen_ai_client_token_usage
LangChainLangChainMetric

gen_ai_client_token_usage

Measures number of input and output tokens used
Dimensions:None
Available on:OpenTelemetryOpenTelemetry (1)
Interface Metrics (1)
OpenTelemetryOpenTelemetry
Number of input and output tokens used per LLM invocation
Dimensions:None
Knowledge Base (1 documents, 0 chunks)
troubleshootingAnthropic: Usage metadata is inaccurate for prompt cache reads/writes · Issue #32818 · langchain-ai/langchain · GitHub1181 wordsscore: 0.75This GitHub issue reports a bug in LangChain's Anthropic integration where usage_metadata incorrectly reports input_tokens when using prompt caching. The actual input tokens should be calculated by subtracting cache_read and cache_creation tokens, but LangChain reports the sum instead. This affects the accuracy of token usage tracking for Anthropic models with prompt caching enabled.

Technical Annotations (35)

Configuration Parameters (6)
streamrecommended: False
Set to False to enable token counting in monitoring logs
modelrecommended: gpt-4o-mini
Use cheapest model that meets quality threshold for each task
max_tokensrecommended: 500
Hard cap on output to prevent unbounded token generation
temperaturerecommended: 0
Deterministic responses are cacheable, reducing redundant calls
retrieval_depthrecommended: 2-3
reduce from common default of 10 chunks
context_token_budgetrecommended: 2000
maximum tokens allocated for retrieved context
Error Signatures (2)
429http status
quotalog pattern
CLI Commands (1)
curl -H "X-API-Key: $ORG_API_KEY" "https://api.cloudact.ai/api/v1/costs/acme_inc/genai/summary?period=last_30d"diagnostic
Technical References (26)
token consumptionconceptChatCompletion.createcomponentmessage_from_streamcomponenttiktokencomponentW&B Billing pagecomponentFOCUS 1.3protocolsystem promptconceptembeddingconceptcontent hashconceptclaude-opus-4-6componentclaude-sonnet-4-6componentclaude-haiku-4-5componentgpt-4ocomponentgpt-4o-minicomponentDeepSeek-V3componentmax_tokenscomponentHeliconecomponentLangSmithcomponentOpenAI Usage Dashboardcomponentreranking modelcomponentvector databasecomponentevaluationconceptleaderboardcomponentinput_tokenscomponentoutput_tokenscomponenttotal_costcomponent
Related Insights (26)
Context Window Saturation in Multi-Agent Systemscritical

Multi-agent research systems consume 15× more tokens than single chats, rapidly filling context windows and causing memory limit errors. Token usage alone explains 80% of performance variance but can exhaust budgets unexpectedly.

Runaway Token Consumption Cost Spikecritical

Recursive chains, agent loops, or unbounded context windows can generate thousands of tokens in seconds, causing unexpected cost explosions (e.g., $12k-$30k bills).

LLM Rate Limiting Without Backoffwarning

LLM provider rate limits cause request failures that aren't retried with appropriate backoff, leading to cascading failures during usage spikes.

Token Consumption Spike: Cost Runaway Detectioncritical

Uncontrolled token usage from buggy loops, malicious users, or missing input validation can cause unexpected cost spikes. Tracking per-request and aggregate token consumption enables budget protection.

LLM Token Budget Exhaustionwarning

When PydanticAI agents consume excessive tokens due to validation retries or complex tool interactions, costs spike and latency increases. This is detectable through token usage metrics and operation cost tracking.

Token Consumption Budget Overruncritical

Uncontrolled token usage from recursive chains, unbounded context windows, or validation retry loops can cause unexpected cost spikes. Without per-request and aggregate monitoring, organizations can face bill shock (e.g., $12k-$30k unexpected charges).

AI Token Consumption Cost and Latency Spikewarning

High gen_ai_client_token_usage and gen_ai_client_operation_time indicate expensive or slow AI model calls, causing both cost overruns and user-facing latency. Large context windows or inefficient prompt engineering amplify this issue.

Token consumption not monitored leads to unpredictable costswarning
Streaming API calls do not track token usage metricswarning
Insufficient credits causes 429 quota exceeded errorscritical
High-cost prompt concentration drives 80% of token costswarning
Conversation history causes exponential token growth in chat applicationswarning
System prompt token overhead from repeated static instructionswarning
Embedding re-computation for unchanged documents wastes API callsinfo
Model over-specification for simple tasks increases costs by 50%warning
Unbounded output token generation multiplies costs 3-5xwarning
Unmonitored token usage causes unexpected cost spikescritical
Conversation re-read tax causes compounding token costswarning
Oversized system prompts waste tokens on every requestwarning
Model routing to appropriate tiers saves thousands monthlyinfo
Conversation summarization reduces token usage by 60%info
RAG systems retrieve excessive contextwarning
Agentic systems multiply token costs through context repetitionwarning
Missing output token limits cause wasteful generationwarning
High latency or cost requires optimization trade-offs between quality and performanceinfo
Request-only tracking misses token cost spikeswarning