Anthropic

Model organization

Anthropic is an AI safety and research company building the Claude family of models.

AI safety, General-purpose models

Model families


Claude	28	2026-10-07	Active

24 of 28 model versions

	Family			Max output	Reasoning	Tool call	Structured	Temperature	Weights
Claude Haiku 5.5	Claude	1	1M	128K	Yes	Yes	-No	Yes	Closed			2026-10-07
Claude Sonnet 5.5	Claude	1	1M	128K	Yes	Yes	-No	-No	Closed			2026-09-28
Claude Opus 5.5	Claude	1	1M	128K	Yes	Yes	-No	-No	Closed			2026-09-22
Claude Fable 5.1	Claude	1	1M	128K	Yes	Yes	-No	-No	Closed			2026-09-01
Claude Mythos 5.1	Claude	-	-	-	-No	-No	-No	-No	Closed			2026-09-01
Claude Opus 5	Claude	14	1M	128K	Yes	Yes	-No	-No	Closed			2026-07-24
Claude Opus 5 (Fast)	Claude	4	1M	128K	Yes	Yes	Yes	-No	Closed	-	-	2026-07-24
Claude Sonnet 5	Claude	20	1M	128K	Yes	Yes	-No	-No	Closed			2026-06-30
Claude Fable 5	Claude	23	1M	128K	Yes	Yes	-No	-No	Closed			2026-06-09
Claude Opus 4.8	Claude	32	1M	128K	Yes	Yes	-No	-No	Closed			2026-05-28
Claude Opus 4.8 (Fast)	Claude	4	1M	128K	Yes	Yes	Yes	-No	Closed	-	-	2026-05-27
Claude Opus 4.7 (Fast)	Claude	3	1M	128K	Yes	Yes	Yes	-No	Closed	-	-	2026-05-12
Claude Opus 4.7	Claude	30	1M	128K	Yes	Yes	-No	-No	Closed			2026-04-16
Claude Sonnet 4.6	Claude	35	1M	64K	Yes	Yes	-No	Yes	Closed			2026-02-17
Claude Opus 4.6	Claude	30	1M	128K	Yes	Yes	-No	Yes	Closed			2026-02-05
Claude Opus 4.5	Claude	24	200K	64K	Yes	Yes	-No	Yes	Closed			2025-11-01
Claude Haiku 4.5	Claude	35	200K	64K	Yes	Yes	-No	Yes	Closed			2025-10-15
Claude Sonnet 4.5	Claude	28	200K	64K	Yes	Yes	-No	Yes	Closed			2025-09-29
Claude Opus 4.1	Claude	22	200K	32K	Yes	Yes	-No	Yes	Closed			2025-08-05
Claude Opus 4	Claude	6	200K	32K	Yes	Yes	-No	Yes	Closed			2025-05-22
Claude Sonnet 4	Claude	6	200K	64K	Yes	Yes	-No	Yes	Closed			2025-05-22
Claude Opus 4	Claude	9	200K	32K	Yes	Yes	-No	Yes	Closed	-	-	2025-05-22
Claude Sonnet 4	Claude	10	1M	64K	Yes	Yes	-No	Yes	Closed	-	-	2025-05-22
Claude Sonnet 3.7	Claude	3	200K	64K	Yes	Yes	-No	Yes	Closed			2025-02-19

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