The Model Index
Models/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.

54models tracked2 open · 52 closed
197index score of GPT-6 Astra#2 of 229 models
29 Sep 2026latest releaseGPT-6.1 Sol
22current versions32 replaced by newer ones

Every modelnewest first

ModelReleasedWeightsIndex scoreInput $/MOutput $/MContext
7GPT-6.1 Sol29 Sep 2026Closed
184
$2.0$101.05M
27GPT-6 Luna22 Sep 2026Closed
166
$0.10$0.501.05M
9GPT-6 Solreplaced22 Sep 2026Closed
180
$2.0$101.05M
2GPT-6 Astra4 Sep 2026Closed
197
$10$501.05M
23GPT-5.6 Lunareplaced9 Jul 2026Closed
169
$0.20$1.21.05M
8GPT-5.6 Solreplaced9 Jul 2026Closed
184
$2.0$101.05M
10GPT-5.6 Terra9 Jul 2026Closed
178
$2.0$121.05M
101GPT-5.5 Instant5 May 2026Closed
136
–––
11GPT-5.5replaced23 Apr 2026Closed
177
$5.0$301.05M
GPT-5.5 Thinking23 Apr 2026Closed
not scored yet
–––
58GPT-5.4 Mini17 Mar 2026Closed
151
$0.75$4.5400K
74GPT-5.4 Nano17 Mar 2026Closed
144
$0.20$1.25400K
16GPT-5.4replaced5 Mar 2026Closed
171
$2.5$151.05M
GPT-5.4 Thinkingreplaced5 Mar 2026Closed
not scored yet
–––
GPT-5.3-Codex-Spark12 Feb 2026Closed
not scored yet
–––
18GPT-5.3-Codex5 Feb 2026Closed
170
$1.75$14400K
GPT-5.2-Codexreplaced18 Dec 2025Closed
not scored yet
$1.75$14400K
38GPT-5.2replaced11 Dec 2025Closed
162
$1.75$14400K
46GPT-5.1-Codex-Max19 Nov 2025Closed
157
$1.25$10400K
52GPT-5.1replaced12 Nov 2025Closed
153
$1.25$10400K
GPT-5.1-Codexreplaced12 Nov 2025Closed
not scored yet
$1.25$10400K
GPT-5.1-Codex-mini12 Nov 2025Closed
not scored yet
$0.25$2.0400K
GPT-5-Codexreplaced15 Sep 2025Closed
not scored yet
–––
49GPT-5replaced7 Aug 2025Closed
154
$1.25$10400K
78GPT-5 minireplaced7 Aug 2025Closed
143
$0.25$2.0400K
117GPT-5 nanoreplaced7 Aug 2025Closed
130
$0.050$0.40400K
114gpt-oss-120b5 Aug 2025Open
131
$0.037$0.17131K
123gpt-oss-20b5 Aug 2025Open
128
$0.018$0.090131K
codex-116 May 2025Closed
not scored yet
–––
63o316 Apr 2025Closed
147
$2.0$8.0200K
77o4-mini16 Apr 2025Closed
143
$1.1$4.4200K
128GPT-4.1replaced14 Apr 2025Closed
125
$2.0$8.01.05M
138GPT-4.1 minireplaced14 Apr 2025Closed
121
$0.40$1.61.05M
157GPT-4.1 nanoreplaced14 Apr 2025Closed
111
$0.10$0.401.05M
GPT-4o (Mar 2025)27 Mar 2025Closed
not scored yet
–––
129GPT-4.5replaced27 Feb 2025Closed
124
–––
109o3-minireplaced31 Jan 2025Closed
132
$1.1$4.4200K
GPT-4o (Jan 2025)replaced29 Jan 2025Closed
not scored yet
–––
102o1replaced5 Dec 2024Closed
136
$15$60200K
167GPT-4o (Nov 2024)replaced20 Nov 2024Closed
108
$2.5$10128K
134o1-minireplaced12 Sep 2024Closed
123
–––
137o1-previewreplaced12 Sep 2024Closed
121
–––
161GPT-4o (Aug 2024)replaced6 Aug 2024Closed
109
$2.5$10128K
176GPT-4o mini18 Jul 2024Closed
105
$0.15$0.60128K
160GPT-4oreplaced13 May 2024Closed
109
$2.5$10128K
171GPT-4 Turbo (Apr 2024)9 Apr 2024Closed
106
$10$30128K
211GPT-3.5 Turbo (Jan 2024)replaced25 Jan 2024Closed
87
–––
200GPT-3.5 Turbo (Nov 2023)replaced6 Nov 2023Closed
91
$1.5$2.04K
174GPT-4 Turboreplaced6 Nov 2023Closed
105
–––
GPT-3.5 Turbo Instruct18 Sep 2023Closed
not scored yet
$1.5$2.04K
210GPT-3.5 Turbo (Jun 2023)replaced13 Jun 2023Closed
88
$0.50$1.516K
185GPT-4 (Jun 2023)replaced13 Jun 2023Closed
99
$30$608K
183GPT-4replaced14 Mar 2023Closed
100
–––
ChatGPT30 Nov 2022Closed
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 history29 announcements

The Race →
DateReleaseKindSource
29 Sep 2026GPT-6.1 SolFlagshipopenai.com ↗
22 Sep 2026GPT-6 Sol + GPT-6 LunaFlagshipopenai.com ↗
4 Sep 2026GPT-6 Astra (preview 09-03)Flagshipopenai.com ↗
9 Jul 2026GPT-5.6 (Sol/Terra/Luna; preview 06-26)Flagshipopenai.com ↗
23 Apr 2026GPT-5.5 (Thinking/Pro)Flagshipopenai.com ↗
5 Mar 2026GPT-5.4 (Thinking/Pro; mini/nano 03-17)Flagshipopenai.com ↗
12 Feb 2026GPT-5.3-Codex-SparkSmall / fastopenai.com ↗
5 Feb 2026GPT-5.3-CodexReasoningopenai.com ↗
18 Dec 2025GPT-5.2-CodexReasoningopenai.com ↗
11 Dec 2025GPT-5.2Flagshipopenai.com ↗
19 Nov 2025GPT-5.1-Codex-MaxReasoningopenai.com ↗
12 Nov 2025GPT-5.1Flagshipopenai.com ↗
15 Sep 2025GPT-5-CodexReasoningopenai.com ↗
7 Aug 2025GPT-5Flagshipopenai.com ↗
5 Aug 2025gpt-oss-120b/20bOpen weightsopenai.com ↗
10 Jun 2025o3-proReasoningopenai.com ↗
16 May 2025codex-1 (Codex research preview)Reasoningopenai.com ↗
16 Apr 2025o3 + o4-miniReasoningopenai.com ↗
14 Apr 2025GPT-4.1Flagshipen.wikipedia.org ↗
27 Feb 2025GPT-4.5Flagshipen.wikipedia.org ↗
31 Jan 2025o3-miniReasoningopenai.com ↗
20 Dec 2024o3 / o3-mini (announced; preview only)Reasoningen.wikipedia.org ↗
5 Dec 2024o1 (full) + o1 proReasoningno link
12 Sep 2024o1-preview / o1-miniReasoningopenai.com ↗
18 Jul 2024GPT-4o miniSmall / fastdevelopers.openai.com ↗
13 May 2024GPT-4oFlagshipopenai.com ↗
6 Nov 2023GPT-4 TurboFlagshipdevelopers.openai.com ↗
14 Mar 2023GPT-4Flagshipopenai.com ↗
30 Nov 2022ChatGPT (GPT-3.5)Flagshipopenai.com ↗

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