{"id":"clm_FC20FD2A53E2","entity":"claude-opus-5-5","predicate":"feature_added","value":"Fast mode","value_json":{"feed":"claude-platform-release-notes","item":"https://platform.claude.com/docs/en/release-notes/overview#2026-09-22","tags":{"v":2,"ai":true,"by":"claude-haiku-5-5","on":"2026-11-07","themes":["pricing_access"]},"check":{"on":"2026-11-08","url":"https://platform.claude.com/docs/en/release-notes/overview#2026-09-22","pages":2,"quote":"Fast mode (research preview) is available for Claude Opus 5.5 on the Claude API.","outcome":"checked"},"evidence":"We’ve launched Claude Opus 5.5 ( claude-opus-5-5 ), a model for long-running agentic coding and knowledge work. It has a 1M token context window by default, 128k max output tokens, and always-on adaptive thinking , at $4 / $20 USD per MTok (Claude Opus 5 is $5 / $25 USD). Claude Opus 5.5 is availabl","merged_from":["clm_0AEE4869FC0D"],"extracted_by":"claude-haiku-5-5","also_observed":["2026-10-15"],"primary_source":true},"valid_from":"2026-09-22","valid_to":null,"published":"2026-09-22","recorded":"2026-11-07","citation":{"plain":"AsOf. \"Claude Opus 5.5 feature added: Fast mode\", as of 2026-09-22. Claim clm_FC20FD2A53E2, https://asof.is/claim/clm_FC20FD2A53E2, accessed 2026-11-09. Source: https://platform.claude.com/docs/en/release-notes/overview#2026-10-15.","url":"https://asof.is/claim/clm_FC20FD2A53E2","accessed":"2026-11-09"},"confidence":0.7,"status":"valid","assertable":true,"superseded_by":null,"supersedes":[],"first_seen_at":"2026-11-07T09:36:48.630797+00:00","updated_at":"2026-11-08T05:30:31.481566+00:00","sources":[{"url":"https://platform.claude.com/docs/en/release-notes/overview#2026-10-15","tier":"primary","publisher":"Anthropic","published_at":"2026-10-15T00:00:00+00:00"},{"url":"https://platform.claude.com/docs/en/release-notes/overview#2026-09-22","tier":"primary","publisher":"Anthropic","published_at":"2026-09-22T00:00:00+00:00"}],"evidence":{"by":"page-read","on":"2026-11-08","quote":"Fast mode (research preview) is available for Claude Opus 5.5 on the Claude API.","url":"https://platform.claude.com/docs/en/release-notes/overview#2026-09-22","excerpt":"We’ve launched Claude Opus 5.5 ( claude-opus-5-5 ), a model for long-running agentic coding and knowledge work. It has a 1M token context window by default, 128k max output tokens, and always-on adaptive thinking , at $4 / $20 USD per MTok (Claude Opus 5 is $5 / $25 USD). Claude Opus 5.5 is availabl"},"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.","citation":"citation: how to cite the row (plain: one sentence with the value, its as-of date, the claim id and URL, the day answered and the primary source; url: the claim page; accessed: the day answered). APA and BibTeX forms are on the claim page.","why_not":{},"checked_by":{"page-read":"its source page states the value and the date"}}}