> Anthropic has 31 models on The Model Index, from Claude (Mar 2023) to Claude Sonnet 5.5 (28 Sep 2026). Its strongest is Claude Opus 5.5, with an index score of 200 (GPT-4 = 100), rank 1 of 229. All are closed models. [Models](https://themodelindex.org/models/) /[Labs](https://themodelindex.org/labs/) / Anthropic Lab · 31 models · since Mar 2023 # Anthropic Anthropic has 31 models on The Model Index, from Claude (Mar 2023) to Claude Sonnet 5.5 (28 Sep 2026). Its strongest is Claude Opus 5.5, with an index score of 200 (GPT-4 = 100), rank 1 of 229. All are closed models. 31 models tracked 0 open · 31 closed 200 index score of Claude Opus 5.5 #1 of 229 models 28 Sep 2026 latest release Claude Sonnet 5.5 8 current versions 23 replaced by newer ones ## Every model · newest first | | MODEL | RELEASED | WEIGHTS | INDEX SCORE | INPUT $/M | OUTPUT $/M | CONTEXT | | --- | --- | --- | --- | --- | --- | --- | --- | | 3 | [Claude Sonnet 5.5](https://themodelindex.org/models/claude-sonnet-5-5/) | 28 Sep 2026 | CLOSED | 193 | $2.0 | $10 | 1M | | 1 | [Claude Opus 5.5](https://themodelindex.org/models/claude-opus-5-5/) | 22 Sep 2026 | CLOSED | 200 | $4.0 | $20 | 1M | | 4 | [Claude Fable 5.1](https://themodelindex.org/models/claude-fable-5-1/) | 1 Sep 2026 | CLOSED | 192 | $10 | $50 | 1M | | | [Claude Mythos 5.1](https://themodelindex.org/models/claude-mythos-5-1/) | 1 Sep 2026 | CLOSED | not scored yet | – | – | – | | 5 | [Claude Opus 5 replaced](https://themodelindex.org/models/claude-opus-5/) | 24 Jul 2026 | CLOSED | 187 | $5.0 | $25 | 1M | | 22 | [Claude Sonnet 5 replaced](https://themodelindex.org/models/claude-sonnet-5/) | 30 Jun 2026 | CLOSED | 169 | $2.0 | $10 | 1M | | 6 | [Claude Fable 5 replaced](https://themodelindex.org/models/claude-fable-5/) | 9 Jun 2026 | CLOSED | 185 | $10 | $50 | 1M | | | [Claude Mythos 5 replaced](https://themodelindex.org/models/claude-mythos-5/) | 9 Jun 2026 | CLOSED | not scored yet | – | – | – | | 12 | [Claude Opus 4.8 replaced](https://themodelindex.org/models/claude-opus-4-8/) | 28 May 2026 | CLOSED | 174 | $5.0 | $25 | 1M | | 21 | [Claude Opus 4.7 replaced](https://themodelindex.org/models/claude-opus-4-7/) | 16 Apr 2026 | CLOSED | 169 | $5.0 | $25 | 1M | | | [Claude Mythos Preview replaced](https://themodelindex.org/models/claude-mythos-preview/) | 7 Apr 2026 | CLOSED | not scored yet | – | – | – | | 40 | [Claude Sonnet 4.6 replaced](https://themodelindex.org/models/claude-sonnet-4-6/) | 17 Feb 2026 | CLOSED | 160 | $3.0 | $15 | 1M | | 26 | [Claude Opus 4.6 replaced](https://themodelindex.org/models/claude-opus-4-6/) | 5 Feb 2026 | CLOSED | 167 | $5.0 | $25 | 1M | | 50 | [Claude Opus 4.5 replaced](https://themodelindex.org/models/claude-opus-4-5/) | 24 Nov 2025 | CLOSED | 153 | $5.0 | $25 | 200K | | 98 | [Claude Haiku 4.5](https://themodelindex.org/models/claude-haiku-4-5/) | 15 Oct 2025 | CLOSED | 137 | $1.0 | $5.0 | 200K | | 67 | [Claude Sonnet 4.5 replaced](https://themodelindex.org/models/claude-sonnet-4-5/) | 29 Sep 2025 | CLOSED | 146 | $3.0 | $15 | 1M | | 87 | [Claude Opus 4.1 replaced](https://themodelindex.org/models/claude-opus-4-1/) | 5 Aug 2025 | CLOSED | 140 | $15 | $75 | 200K | | 96 | [Claude Opus 4 replaced](https://themodelindex.org/models/claude-opus-4/) | 22 May 2025 | CLOSED | 137 | – | – | – | | 104 | [Claude Sonnet 4 replaced](https://themodelindex.org/models/claude-sonnet-4/) | 22 May 2025 | CLOSED | 135 | $3.0 | $15 | 200K | | 107 | [Claude 3.7 Sonnet replaced](https://themodelindex.org/models/claude-3-7-sonnet/) | 24 Feb 2025 | CLOSED | 134 | – | – | – | | 169 | [Claude 3.5 Haiku replaced](https://themodelindex.org/models/claude-3-5-haiku/) | 4 Nov 2024 | CLOSED | 107 | – | – | – | | 143 | [Claude 3.5 Sonnet replaced](https://themodelindex.org/models/claude-3-5-sonnet-2024-10/) | 22 Oct 2024 | CLOSED | 118 | – | – | – | | 155 | [Claude 3.5 Sonnet (Jun 2024) replaced](https://themodelindex.org/models/claude-3-5-sonnet/) | 20 Jun 2024 | CLOSED | 111 | – | – | – | | 197 | [Claude 3 Haiku replaced](https://themodelindex.org/models/claude-3-haiku/) | 13 Mar 2024 | CLOSED | 92 | – | – | – | | 175 | [Claude 3 Opus replaced](https://themodelindex.org/models/claude-3-opus/) | 4 Mar 2024 | CLOSED | 105 | – | – | – | | 193 | [Claude 3 Sonnet replaced](https://themodelindex.org/models/claude-3-sonnet/) | 4 Mar 2024 | CLOSED | 95 | – | – | – | | 196 | [Claude 2.1](https://themodelindex.org/models/claude-2-1/) | 21 Nov 2023 | CLOSED | 93 | – | – | – | | 209 | [Claude Instant](https://themodelindex.org/models/claude-instant/) | 9 Aug 2023 | CLOSED | 88 | – | – | – | | | [Claude Instant 1.2](https://themodelindex.org/models/claude-instant-1-2/) | 9 Aug 2023 | CLOSED | not scored yet | – | – | – | | 199 | [Claude 2 replaced](https://themodelindex.org/models/claude-2/) | 11 Jul 2023 | CLOSED | 91 | – | – | – | | | [Claude replaced](https://themodelindex.org/models/claude/) | 14 Mar 2023 | CLOSED | not scored yet | – | – | – | Index score is fitted from independent evaluations and scaled so GPT-4 = 100; a striped bar is an estimate for a model not yet independently tested. Prices are list prices per million tokens. ## Release history · 24 announcements [The Race →](https://themodelindex.org/race/) | DATE | RELEASE | KIND | SOURCE | | --- | --- | --- | --- | | 28 Sep 2026 | Claude Sonnet 5.5 | Flagship | [anthropic.com ↗](https://www.anthropic.com/claude-sonnet-5-5) | | 22 Sep 2026 | Claude Opus 5.5 | Flagship | [anthropic.com ↗](https://www.anthropic.com/claude-opus-5-5) | | 1 Sep 2026 | Claude Fable 5.1 + Mythos 5.1 | Flagship | [anthropic.com ↗](https://www.anthropic.com/claude-fable-and-mythos-5-1) | | 24 Jul 2026 | Claude Opus 5 | Flagship | [anthropic.com ↗](https://www.anthropic.com/news/claude-opus-5) | | 30 Jun 2026 | Claude Sonnet 5 | Flagship | [anthropic.com ↗](https://www.anthropic.com/news/claude-sonnet-5) | | 9 Jun 2026 | Claude Fable 5 + Mythos 5 (restricted) | Flagship | [anthropic.com ↗](https://www.anthropic.com/news/claude-fable-5-mythos-5) | | 28 May 2026 | Claude Opus 4.8 | Flagship | [anthropic.com ↗](https://www.anthropic.com/research/claude-opus-4-8) | | 16 Apr 2026 | Claude Opus 4.7 | Flagship | [anthropic.com ↗](https://www.anthropic.com/news/claude-opus-4-7) | | 7 Apr 2026 | Claude Mythos Preview (restricted; Project Glasswing) | Flagship | [anthropic.com ↗](https://www.anthropic.com/research/mythos-preview) | | 17 Feb 2026 | Claude Sonnet 4.6 | Flagship | [anthropic.com ↗](https://www.anthropic.com/news/claude-sonnet-4-6) | | 5 Feb 2026 | Claude Opus 4.6 | Flagship | [anthropic.com ↗](https://www.anthropic.com/news/claude-opus-4-6) | | 24 Nov 2025 | Claude Opus 4.5 | Flagship | [anthropic.com ↗](https://www.anthropic.com/news/claude-opus-4-5) | | 15 Oct 2025 | Claude Haiku 4.5 | Small / fast | [anthropic.com ↗](https://www.anthropic.com/news/claude-haiku-4-5) | | 29 Sep 2025 | Claude Sonnet 4.5 | Flagship | [anthropic.com ↗](https://www.anthropic.com/news/claude-sonnet-4-5) | | 5 Aug 2025 | Claude Opus 4.1 | Flagship | [anthropic.com ↗](https://www.anthropic.com/news/claude-opus-4-1) | | 22 May 2025 | Claude Opus 4 + Sonnet 4 | Flagship | [anthropic.com ↗](https://www.anthropic.com/news/claude-4) | | 24 Feb 2025 | Claude 3.7 Sonnet | Reasoning | [anthropic.com ↗](https://www.anthropic.com/news/claude-3-7-sonnet) | | 22 Oct 2024 | Claude 3.5 Sonnet (new) + 3.5 Haiku (avail. 11-04) | Flagship | [anthropic.com ↗](https://www.anthropic.com/news/3-5-models-and-computer-use) | | 20 Jun 2024 | Claude 3.5 Sonnet | Flagship | [anthropic.com ↗](https://www.anthropic.com/news/claude-3-5-sonnet) | | 4 Mar 2024 | Claude 3 (Opus/Sonnet; Haiku 03-13) | Flagship | [anthropic.com ↗](https://www.anthropic.com/news/claude-3-family) | | 21 Nov 2023 | Claude 2.1 | Flagship | [anthropic.com ↗](https://www.anthropic.com/news/claude-2-1) | | 9 Aug 2023 | Claude Instant 1.2 | Small / fast | [anthropic.com ↗](https://www.anthropic.com/news/releasing-claude-instant-1-2) | | 11 Jul 2023 | Claude 2 | Flagship | [anthropic.com ↗](https://www.anthropic.com/news/claude-2) | | 14 Mar 2023 | Claude (1) | Flagship | [anthropic.com ↗](https://www.anthropic.com/news/introducing-claude) | Dates come from each lab's own announcement, linked where one exists. --- Source: https://themodelindex.org/labs/anthropic/ · The Model Index · data as of 2026-10-01