{"id":"clm_05E77EFE1F05","entity":"anthropic","predicate":"model_release","value":"Claude Opus 5.5","value_json":{"feed":"claude-apps-release-notes","item":"https://support.claude.com/en/articles/12138966-release-notes#2026-09-22","tags":{"v":2,"ai":true,"by":"claude-haiku-5-5","on":"2026-10-31","themes":["reasoning"],"model_tier":"frontier","release_kind":"model"},"check":{"on":"2026-10-31","url":"https://support.claude.com/en/articles/12138966-release-notes#2026-09-22","pages":1,"quote":"September 22, 2026 Claude Opus 5.5 launch We just launched Claude Opus 5.5, the first model in our new Claude 5.5 family.","outcome":"checked"},"evidence":"Claude Opus 5.5 launch · We just launched Claude Opus 5.5, the first model in our new Claude 5.5 family. It performs at the level of Claude Fable 5.1 on most work and costs 40% less to run than Opus 5. For more information, see our blog post: Introducing Claude Opus 5.5 .","extracted_by":"claude-haiku-5-5","primary_source":true},"valid_from":"2026-09-22","valid_to":null,"published":"2026-09-22","recorded":"2026-10-31","confidence":0.7,"status":"valid","assertable":true,"superseded_by":null,"supersedes":[],"first_seen_at":"2026-10-31T02:13:28.6448+00:00","updated_at":"2026-10-31T03:52:09.939321+00:00","sources":[{"url":"https://support.claude.com/en/articles/12138966-release-notes#2026-09-22","tier":"primary","publisher":"Anthropic","published_at":"2026-09-22T00:00:00+00:00"}],"evidence":{"by":"page-read","on":"2026-10-31","quote":"September 22, 2026 Claude Opus 5.5 launch We just launched Claude Opus 5.5, the first model in our new Claude 5.5 family.","url":"https://support.claude.com/en/articles/12138966-release-notes#2026-09-22","excerpt":"Claude Opus 5.5 launch · We just launched Claude Opus 5.5, the first model in our new Claude 5.5 family. It performs at the level of Claude Fable 5.1 on most work and costs 40% less to run than Opus 5. For more information, see our blog post: Introducing Claude Opus 5.5 ."},"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"}}}