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docs(otel): document litellm.request.route on the LLM call span #1185

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yucheng-berri merged 3 commits into from
Sep 5, 2026
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docs(otel): document litellm.request.route on the LLM call span #1185

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docs(otel): document litellm.request.route on the LLM call span
shivamrawat1 Sep 4, 2026
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docs(otel): say what litellm.request.route actually reports
yucheng-berri Sep 5, 2026
42b464e
docs(otel): note the auth-recorded fallback for litellm.request.route
yucheng-berri Sep 5, 2026
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1 change: 1 addition & 0 deletions docs/observability/opentelemetry_v2.md
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Expand Up @@ -524,6 +524,7 @@ Response, usage, cost, identity:
| `litellm.call_id` | always |
| `litellm.provider.model` | always (the model string actually sent to the provider) |
| `litellm.request.streaming` | when true |
| `litellm.request.route` | on the proxy (the same route the root span reports as `http.route`: the FastAPI route template, e.g. `/v1/responses/{response_id}`, or the literal path on a passthrough prefix such as `/openai/...`; when no server span exists, for example the route is in `OTEL_PYTHON_FASTAPI_EXCLUDED_URLS` or the FastAPI instrumentation is not installed, it falls back to the route the proxy recorded at auth) |
| `litellm.cost.total` | on success |
| `litellm.cost.input`, `output`, `cache_read`, `cache_creation`, `tool_usage` | when the source reported the breakdown |
| `litellm.cost.original`, `discount_amount`, `discount_percent`, `margin_fixed_amount`, `margin_percent`, `margin_total_amount` | when reported |
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