{"id":"clm_1B580ED7C1AA","entity":"anthropic","predicate":"feature_added","value":"usage.output_tokens_details.thinking_tokens","value_json":{"feed":"claude-platform-release-notes","item":"https://platform.claude.com/docs/en/release-notes/overview#2026-05-27","tags":{"v":2,"ai":true,"by":"claude-haiku-5-5","on":"2026-10-31","themes":["developer_platform","reasoning"]},"check":{"on":"2026-10-31","url":"https://platform.claude.com/docs/en/release-notes/overview#2026-05-27","pages":1,"quote":"May 27, 2026  The Messages API response now includes usage.output_tokens_details.thinking_tokens , reporting how many of the billed output tokens were extended thinking.","outcome":"checked"},"evidence":"The Messages API response now includes usage.output_tokens_details.thinking_tokens , reporting how many of the billed output tokens were extended thinking. When streaming, the breakdown appears only on the final message_delta event. No beta header is required.","extracted_by":"claude-haiku-5-5","primary_source":true},"valid_from":"2026-05-27","valid_to":null,"published":"2026-05-27","recorded":"2026-10-31","confidence":0.7,"status":"valid","assertable":true,"superseded_by":null,"supersedes":[],"first_seen_at":"2026-10-31T16:08:13.126469+00:00","updated_at":"2026-10-31T16:26:39.366+00:00","sources":[{"url":"https://platform.claude.com/docs/en/release-notes/overview#2026-05-27","tier":"primary","publisher":"Anthropic","published_at":"2026-05-27T00:00:00+00:00"}],"evidence":{"by":"page-read","on":"2026-10-31","quote":"May 27, 2026  The Messages API response now includes usage.output_tokens_details.thinking_tokens , reporting how many of the billed output tokens were extended thinking.","url":"https://platform.claude.com/docs/en/release-notes/overview#2026-05-27","excerpt":"The Messages API response now includes usage.output_tokens_details.thinking_tokens , reporting how many of the billed output tokens were extended thinking. When streaming, the breakdown appears only on the final message_delta event. No beta header is required."},"legend":{"dates":"valid_from: when the claim took effect (a period figure: the day its period closed). published: the earliest day a source on the record published it (a filing's filing date, a post's date; null when no source carries one). recorded: the day AsOf first held it. A figure can take effect weeks before it is published.","why_not":{},"checked_by":{"page-read":"its source page states the value and the date"}}}