genai: define reasoning tokens attribute#3383
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lmolkova merged 1 commit intoopen-telemetry:mainfrom Apr 27, 2026
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@lmolkova what else is needed to get this merged? |
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@verdie-g could you please follow up on #3383 (comment) ? we should have reasoning attributes on common GenAI span |
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this LGTM now |
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thanks @verdie-g! I posted a prototype for this at trask/genai-otel-conformance#143 |
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@verdie-g thanks for the contribution! would you be interested in making final fixes on this PR? It seems there are some unintentional changes that are blocking it. Let me know if you need any help, thanks! |
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Add reasoning output tokens attribute to track tokens used for reasoning (chain-of-thought, extended thinking). The attribute is added to the common GenAI inference client attributes and to the OpenAI-specific span with a mapping note.
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@lmolkova I've reverted the changes to the specific providers so it doesn't create unrelated changes. |
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Fixes #3194
Changes
This PR adds a new GenAI attribute to represent reasoning tokens:
gen_ai.usage.reasoning.output_tokens.Merge requirement checklist
[chore]