> OpenAI has 54 models on The Model Index, from ChatGPT (Nov 2022) to GPT-6.1 Sol (29 Sep 2026). Its strongest is GPT-6 Astra, with an index score of 197 (GPT-4 = 100), rank 2 of 229. 2 have open weights.

[Models](https://themodelindex.org/models/) /[Labs](https://themodelindex.org/labs/) /

OpenAI

Lab · 54 models · since Nov 2022

# OpenAI

OpenAI has 54 models on The Model Index, from ChatGPT (Nov 2022) to GPT-6.1 Sol (29 Sep 2026). Its strongest is GPT-6 Astra, with an index score of 197 (GPT-4 = 100), rank 2 of 229. 2 have open weights.

54

models tracked

2 open · 52 closed

197

index score of GPT-6 Astra

#2 of 229 models

29 Sep 2026

latest release

GPT-6.1 Sol

22

current versions

32 replaced by newer ones

## Every model · newest first

| | MODEL | RELEASED | WEIGHTS | INDEX SCORE | INPUT $/M | OUTPUT $/M | CONTEXT |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 7 | [GPT-6.1 Sol](https://themodelindex.org/models/gpt-6-1-sol/) | 29 Sep 2026 | CLOSED | 184 | $2.0 | $10 | 1.05M |
| 27 | [GPT-6 Luna](https://themodelindex.org/models/gpt-6-luna/) | 22 Sep 2026 | CLOSED | 166 | $0.10 | $0.50 | 1.05M |
| 9 | [GPT-6 Sol replaced](https://themodelindex.org/models/gpt-6-sol/) | 22 Sep 2026 | CLOSED | 180 | $2.0 | $10 | 1.05M |
| 2 | [GPT-6 Astra](https://themodelindex.org/models/gpt-6-astra/) | 4 Sep 2026 | CLOSED | 197 | $10 | $50 | 1.05M |
| 23 | [GPT-5.6 Luna replaced](https://themodelindex.org/models/gpt-5-6-luna/) | 9 Jul 2026 | CLOSED | 169 | $0.20 | $1.2 | 1.05M |
| 8 | [GPT-5.6 Sol replaced](https://themodelindex.org/models/gpt-5-6-sol/) | 9 Jul 2026 | CLOSED | 184 | $2.0 | $10 | 1.05M |
| 10 | [GPT-5.6 Terra](https://themodelindex.org/models/gpt-5-6-terra/) | 9 Jul 2026 | CLOSED | 178 | $2.0 | $12 | 1.05M |
| 101 | [GPT-5.5 Instant](https://themodelindex.org/models/gpt-5-5-instant/) | 5 May 2026 | CLOSED | 136 | – | – | – |
| 11 | [GPT-5.5 replaced](https://themodelindex.org/models/gpt-5-5/) | 23 Apr 2026 | CLOSED | 177 | $5.0 | $30 | 1.05M |
| | [GPT-5.5 Thinking](https://themodelindex.org/models/gpt-5-5-thinking/) | 23 Apr 2026 | CLOSED | not scored yet | – | – | – |
| 58 | [GPT-5.4 Mini](https://themodelindex.org/models/gpt-5-4-mini/) | 17 Mar 2026 | CLOSED | 151 | $0.75 | $4.5 | 400K |
| 74 | [GPT-5.4 Nano](https://themodelindex.org/models/gpt-5-4-nano/) | 17 Mar 2026 | CLOSED | 144 | $0.20 | $1.25 | 400K |
| 16 | [GPT-5.4 replaced](https://themodelindex.org/models/gpt-5-4/) | 5 Mar 2026 | CLOSED | 171 | $2.5 | $15 | 1.05M |
| | [GPT-5.4 Thinking replaced](https://themodelindex.org/models/gpt-5-4-thinking/) | 5 Mar 2026 | CLOSED | not scored yet | – | – | – |
| | [GPT-5.3-Codex-Spark](https://themodelindex.org/models/gpt-5-3-codex-spark/) | 12 Feb 2026 | CLOSED | not scored yet | – | – | – |
| 18 | [GPT-5.3-Codex](https://themodelindex.org/models/gpt-5-3-codex/) | 5 Feb 2026 | CLOSED | 170 | $1.75 | $14 | 400K |
| | [GPT-5.2-Codex replaced](https://themodelindex.org/models/gpt-5-2-codex/) | 18 Dec 2025 | CLOSED | not scored yet | $1.75 | $14 | 400K |
| 38 | [GPT-5.2 replaced](https://themodelindex.org/models/gpt-5-2/) | 11 Dec 2025 | CLOSED | 162 | $1.75 | $14 | 400K |
| 46 | [GPT-5.1-Codex-Max](https://themodelindex.org/models/gpt-5-1-codex-max/) | 19 Nov 2025 | CLOSED | 157 | $1.25 | $10 | 400K |
| 52 | [GPT-5.1 replaced](https://themodelindex.org/models/gpt-5-1/) | 12 Nov 2025 | CLOSED | 153 | $1.25 | $10 | 400K |
| | [GPT-5.1-Codex replaced](https://themodelindex.org/models/gpt-5-1-codex/) | 12 Nov 2025 | CLOSED | not scored yet | $1.25 | $10 | 400K |
| | [GPT-5.1-Codex-mini](https://themodelindex.org/models/gpt-5-1-codex-mini/) | 12 Nov 2025 | CLOSED | not scored yet | $0.25 | $2.0 | 400K |
| | [GPT-5-Codex replaced](https://themodelindex.org/models/gpt-5-codex/) | 15 Sep 2025 | CLOSED | not scored yet | – | – | – |
| 49 | [GPT-5 replaced](https://themodelindex.org/models/gpt-5/) | 7 Aug 2025 | CLOSED | 154 | $1.25 | $10 | 400K |
| 78 | [GPT-5 mini replaced](https://themodelindex.org/models/gpt-5-mini/) | 7 Aug 2025 | CLOSED | 143 | $0.25 | $2.0 | 400K |
| 117 | [GPT-5 nano replaced](https://themodelindex.org/models/gpt-5-nano/) | 7 Aug 2025 | CLOSED | 130 | $0.050 | $0.40 | 400K |
| 114 | [gpt-oss-120b](https://themodelindex.org/models/gpt-oss-120b/) | 5 Aug 2025 | OPEN | 131 | $0.037 | $0.17 | 131K |
| 123 | [gpt-oss-20b](https://themodelindex.org/models/gpt-oss-20b/) | 5 Aug 2025 | OPEN | 128 | $0.018 | $0.090 | 131K |
| | [codex-1](https://themodelindex.org/models/codex-1/) | 16 May 2025 | CLOSED | not scored yet | – | – | – |
| 63 | [o3](https://themodelindex.org/models/o3-2025-04/) | 16 Apr 2025 | CLOSED | 147 | $2.0 | $8.0 | 200K |
| 77 | [o4-mini](https://themodelindex.org/models/o4-mini/) | 16 Apr 2025 | CLOSED | 143 | $1.1 | $4.4 | 200K |
| 128 | [GPT-4.1 replaced](https://themodelindex.org/models/gpt-4-1/) | 14 Apr 2025 | CLOSED | 125 | $2.0 | $8.0 | 1.05M |
| 138 | [GPT-4.1 mini replaced](https://themodelindex.org/models/gpt-4-1-mini/) | 14 Apr 2025 | CLOSED | 121 | $0.40 | $1.6 | 1.05M |
| 157 | [GPT-4.1 nano replaced](https://themodelindex.org/models/gpt-4-1-nano/) | 14 Apr 2025 | CLOSED | 111 | $0.10 | $0.40 | 1.05M |
| | [GPT-4o (Mar 2025)](https://themodelindex.org/models/gpt-4o-mar-2025/) | 27 Mar 2025 | CLOSED | not scored yet | – | – | – |
| 129 | [GPT-4.5 replaced](https://themodelindex.org/models/gpt-4-5/) | 27 Feb 2025 | CLOSED | 124 | – | – | – |
| 109 | [o3-mini replaced](https://themodelindex.org/models/o3-mini-2025-01/) | 31 Jan 2025 | CLOSED | 132 | $1.1 | $4.4 | 200K |
| | [GPT-4o (Jan 2025) replaced](https://themodelindex.org/models/gpt-4o-jan-2025/) | 29 Jan 2025 | CLOSED | not scored yet | – | – | – |
| 102 | [o1 replaced](https://themodelindex.org/models/o1/) | 5 Dec 2024 | CLOSED | 136 | $15 | $60 | 200K |
| 167 | [GPT-4o (Nov 2024) replaced](https://themodelindex.org/models/gpt-4o-nov-2024/) | 20 Nov 2024 | CLOSED | 108 | $2.5 | $10 | 128K |
| 134 | [o1-mini replaced](https://themodelindex.org/models/o1-mini/) | 12 Sep 2024 | CLOSED | 123 | – | – | – |
| 137 | [o1-preview replaced](https://themodelindex.org/models/o1-preview/) | 12 Sep 2024 | CLOSED | 121 | – | – | – |
| 161 | [GPT-4o (Aug 2024) replaced](https://themodelindex.org/models/gpt-4o-aug-2024/) | 6 Aug 2024 | CLOSED | 109 | $2.5 | $10 | 128K |
| 176 | [GPT-4o mini](https://themodelindex.org/models/gpt-4o-mini/) | 18 Jul 2024 | CLOSED | 105 | $0.15 | $0.60 | 128K |
| 160 | [GPT-4o replaced](https://themodelindex.org/models/gpt-4o/) | 13 May 2024 | CLOSED | 109 | $2.5 | $10 | 128K |
| 171 | [GPT-4 Turbo (Apr 2024)](https://themodelindex.org/models/gpt-4-turbo-apr-2024/) | 9 Apr 2024 | CLOSED | 106 | $10 | $30 | 128K |
| 211 | [GPT-3.5 Turbo (Jan 2024) replaced](https://themodelindex.org/models/gpt-3-5-turbo-jan-2024/) | 25 Jan 2024 | CLOSED | 87 | – | – | – |
| 200 | [GPT-3.5 Turbo (Nov 2023) replaced](https://themodelindex.org/models/gpt-3-5-turbo-nov-2023/) | 6 Nov 2023 | CLOSED | 91 | $1.5 | $2.0 | 4K |
| 174 | [GPT-4 Turbo replaced](https://themodelindex.org/models/gpt-4-turbo/) | 6 Nov 2023 | CLOSED | 105 | – | – | – |
| | [GPT-3.5 Turbo Instruct](https://themodelindex.org/models/gpt-3-5-turbo-instruct/) | 18 Sep 2023 | CLOSED | not scored yet | $1.5 | $2.0 | 4K |
| 210 | [GPT-3.5 Turbo (Jun 2023) replaced](https://themodelindex.org/models/gpt-3-5-turbo-jun-2023/) | 13 Jun 2023 | CLOSED | 88 | $0.50 | $1.5 | 16K |
| 185 | [GPT-4 (Jun 2023) replaced](https://themodelindex.org/models/gpt-4-jun-2023/) | 13 Jun 2023 | CLOSED | 99 | $30 | $60 | 8K |
| 183 | [GPT-4 replaced](https://themodelindex.org/models/gpt-4/) | 14 Mar 2023 | CLOSED | 100 | – | – | – |
| | [ChatGPT](https://themodelindex.org/models/chatgpt/) | 30 Nov 2022 | 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 · 29 announcements

[The Race →](https://themodelindex.org/race/)

| DATE | RELEASE | KIND | SOURCE |
| --- | --- | --- | --- |
| 29 Sep 2026 | GPT-6.1 Sol | Flagship | [openai.com ↗](https://openai.com/index/introducing-gpt-6-1-sol/) |
| 22 Sep 2026 | GPT-6 Sol + GPT-6 Luna | Flagship | [openai.com ↗](https://openai.com/index/introducing-gpt-6-sol-and-luna/) |
| 4 Sep 2026 | GPT-6 Astra (preview 09-03) | Flagship | [openai.com ↗](https://openai.com/index/gpt-6-astra-next-generation-work/) |
| 9 Jul 2026 | GPT-5.6 (Sol/Terra/Luna; preview 06-26) | Flagship | [openai.com ↗](https://openai.com/index/improving-gpt-5-6-sol-in-chatgpt/) |
| 23 Apr 2026 | GPT-5.5 (Thinking/Pro) | Flagship | [openai.com ↗](https://openai.com/index/introducing-gpt-5-5/) |
| 5 Mar 2026 | GPT-5.4 (Thinking/Pro; mini/nano 03-17) | Flagship | [openai.com ↗](https://openai.com/index/gpt-5-4-thinking-system-card/) |
| 12 Feb 2026 | GPT-5.3-Codex-Spark | Small / fast | [openai.com ↗](https://openai.com/index/introducing-gpt-5-3-codex-spark/) |
| 5 Feb 2026 | GPT-5.3-Codex | Reasoning | [openai.com ↗](https://openai.com/ja-JP/index/introducing-gpt-5-3-codex/) |
| 18 Dec 2025 | GPT-5.2-Codex | Reasoning | [openai.com ↗](https://openai.com/index/introducing-gpt-5-2-codex/) |
| 11 Dec 2025 | GPT-5.2 | Flagship | [openai.com ↗](https://openai.com/zh-Hans-CN/index/introducing-gpt-5-2/) |
| 19 Nov 2025 | GPT-5.1-Codex-Max | Reasoning | [openai.com ↗](https://openai.com/index/gpt-5-1-codex-max/) |
| 12 Nov 2025 | GPT-5.1 | Flagship | [openai.com ↗](https://openai.com/index/gpt-5-system-card-addendum-gpt-5-1/) |
| 15 Sep 2025 | GPT-5-Codex | Reasoning | [openai.com ↗](https://openai.com/index/introducing-upgrades-to-codex/) |
| 7 Aug 2025 | GPT-5 | Flagship | [openai.com ↗](https://openai.com/index/introducing-gpt-5/) |
| 5 Aug 2025 | gpt-oss-120b/20b | Open weights | [openai.com ↗](https://openai.com/index/gpt-oss-model-card/) |
| 10 Jun 2025 | o3-pro | Reasoning | [openai.com ↗](https://openai.com/index/introducing-o3-and-o4-mini/) |
| 16 May 2025 | codex-1 (Codex research preview) | Reasoning | [openai.com ↗](https://openai.com/index/introducing-codex/) |
| 16 Apr 2025 | o3 + o4-mini | Reasoning | [openai.com ↗](https://openai.com/index/introducing-o3-and-o4-mini/) |
| 14 Apr 2025 | GPT-4.1 | Flagship | [en.wikipedia.org ↗](https://en.wikipedia.org/wiki/GPT-4.1) |
| 27 Feb 2025 | GPT-4.5 | Flagship | [en.wikipedia.org ↗](https://en.wikipedia.org/wiki/GPT-4.5) |
| 31 Jan 2025 | o3-mini | Reasoning | [openai.com ↗](https://openai.com/index/openai-o3-mini/) |
| 20 Dec 2024 | o3 / o3-mini (announced; preview only) | Reasoning | [en.wikipedia.org ↗](https://en.wikipedia.org/wiki/OpenAI_o3) |
| 5 Dec 2024 | o1 (full) + o1 pro | Reasoning | no link |
| 12 Sep 2024 | o1-preview / o1-mini | Reasoning | [openai.com ↗](https://openai.com/index/introducing-openai-o1-preview/) |
| 18 Jul 2024 | GPT-4o mini | Small / fast | [developers.openai.com ↗](https://developers.openai.com/api/docs/models/gpt-4o-mini-tts) |
| 13 May 2024 | GPT-4o | Flagship | [openai.com ↗](https://openai.com/index/hello-gpt-4o/) |
| 6 Nov 2023 | GPT-4 Turbo | Flagship | [developers.openai.com ↗](https://developers.openai.com/api/docs/models/gpt-4-turbo) |
| 14 Mar 2023 | GPT-4 | Flagship | [openai.com ↗](https://openai.com/index/gpt-4-research/) |
| 30 Nov 2022 | ChatGPT (GPT-3.5) | Flagship | [openai.com ↗](https://openai.com/index/chatgpt/) |

Dates come from each lab's own announcement, linked where one exists.

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Source: https://themodelindex.org/labs/openai/ · The Model Index · data as of 2026-10-01