models.md Codex Docs, 2026-02-23 18:27 UTC → 2026-04-20 18:26 UTC

2 2 

3## Recommended models3## Recommended models

4 4 

5![gpt-5.3-codex](/images/codex/codex-wallpaper-1.webp)5![gpt-5.4](/images/api/models/gpt-5.4.jpg)

6 6 

7gpt-5.3-codex7gpt-5.4

8 8 

9Most capable agentic coding model to date, combining frontier coding performance with stronger reasoning and professional knowledge capabilities.9Flagship frontier model for professional work that brings the industry-leading coding capabilities of GPT-5.3-Codex together with stronger reasoning, tool use, and agentic workflows.

10 10 

11codex -m gpt-5.3-codex11codex -m gpt-5.4

12 12 

13Copy command13Copy command

14 14 

26 26 

27API Access27API Access

28 28 

29![gpt-5.3-codex-spark](/images/codex/codex-wallpaper-2.webp)29![gpt-5.4-mini](/images/api/models/gpt-5-mini.jpg)

30 30 

31gpt-5.3-codex-spark31gpt-5.4-mini

32 32 

33Text-only research preview model optimized for near-instant, real-time coding iteration. Available to ChatGPT Pro users.33Fast, efficient mini model for responsive coding tasks and subagents.

34 34 

35codex -m gpt-5.3-codex-spark35codex -m gpt-5.4-mini

36 36 

37Copy command37Copy command

38 38 

50 50 

51API Access51API Access

52 52 

53![gpt-5.2-codex](/images/codex/gpt-5.2-codex.png)53![gpt-5.3-codex](/images/codex/codex-wallpaper-1.webp)

54 54 

55gpt-5.2-codex55gpt-5.3-codex

56 56 

57Advanced coding model for real-world engineering. Succeeded by GPT-5.3-Codex.57Industry-leading coding model for complex software engineering. Its coding capabilities now also power GPT-5.4.

58 58 

59codex -m gpt-5.2-codex59codex -m gpt-5.3-codex

60 60 

61Copy command61Copy command

62 62 

74 74 

75API Access75API Access

76 76 

77For most coding tasks in Codex, start with gpt-5.3-codex. It is available for77![gpt-5.3-codex-spark](/images/codex/codex-wallpaper-2.webp)

78ChatGPT-authenticated Codex sessions in the Codex app, CLI, IDE extension, and

79Codex Cloud. API access for GPT-5.3-Codex will come soon. The

80gpt-5.3-codex-spark model is available in research preview for ChatGPT Pro

81subscribers.

82 

83## Alternative models

84 

85![gpt-5.2](/images/api/models/gpt-5.2.jpg)

86 

87gpt-5.2

88 

89Our best general agentic model for tasks across industries and domains.

90 

91codex -m gpt-5.2

92 

93Copy command

94 

95Show details

96 

97![gpt-5.1-codex-max](/images/api/models/gpt-5.1-codex-max.jpg)

98 

99gpt-5.1-codex-max

100 

101Optimized for long-horizon, agentic coding tasks in Codex.

102 

103codex -m gpt-5.1-codex-max

104 

105Copy command

106 

107Show details

108 

109![gpt-5.1](/images/api/models/gpt-5.1.jpg)

110 

111gpt-5.1

112 

113Great for coding and agentic tasks across domains. Succeeded by GPT-5.2.

114 

115codex -m gpt-5.1

116 

117Copy command

118 

119Show details

120 

121![gpt-5.1-codex](/images/api/models/gpt-5.1-codex.jpg)

122 78 

123gpt-5.1-codex79gpt-5.3-codex-spark

124 80 

125Optimized for long-running, agentic coding tasks in Codex. Succeeded by GPT-5.1-Codex-Max.81Text-only research preview model optimized for near-instant, real-time coding iteration. Available to ChatGPT Pro users.

126 82 

127codex -m gpt-5.1-codex83codex -m gpt-5.3-codex-spark

128 84 

129Copy command85Copy command

130 86 

131Show details87Capability

132 

133![gpt-5-codex](/images/api/models/gpt-5-codex.jpg)

134 

135gpt-5-codex

136 

137Version of GPT-5 tuned for long-running, agentic coding tasks. Succeeded by GPT-5.1-Codex.

138 

139codex -m gpt-5-codex

140 88 

141Copy command89Speed

142 90 

143Show details91Codex CLI & SDK

144 92 

145![gpt-5-codex-mini](/images/api/models/gpt-5-codex.jpg)93Codex app & IDE extension

146 94 

147gpt-5-codex-mini95Codex Cloud

148 96 

149Smaller, more cost-effective version of GPT-5-Codex. Succeeded by GPT-5.1-Codex-Mini.97ChatGPT Credits

150 98 

151codex -m gpt-5-codex99API Access

152 100 

153Copy command101For most tasks in Codex, start with `gpt-5.4`. It combines strong coding,

102reasoning, native computer use, and broader professional workflows in one

103model. Use `gpt-5.4-mini` when you want a faster, lower-cost option for

104lighter coding tasks or subagents. The `gpt-5.3-codex-spark` model is

105available in research preview for ChatGPT Pro subscribers and is optimized for

106near-instant, real-time coding iteration.

154 107 

155Show details108## Alternative models

156 109 

157![gpt-5](/images/api/models/gpt-5.jpg)110![gpt-5.2](/images/api/models/gpt-5.2.jpg)

158 111 

159gpt-5112gpt-5.2

160 113 

161Reasoning model for coding and agentic tasks across domains. Succeeded by GPT-5.1.114Previous general-purpose model for coding and agentic tasks, including hard debugging tasks that benefit from deeper deliberation.

162 115 

163codex -m gpt-5116codex -m gpt-5.2

164 117 

165Copy command118Copy command

166 119 

168 121 

169## Other models122## Other models

170 123 

171Codex works best with the models listed above.124When you sign in with ChatGPT, Codex works best with the models listed above.

172 125 

173You can also point Codex at any model and provider that supports either the [Chat Completions](https://platform.openai.com/docs/api-reference/chat) or [Responses APIs](https://platform.openai.com/docs/api-reference/responses) to fit your specific use case.126You can also point Codex at any model and provider that supports either the [Chat Completions](https://platform.openai.com/docs/api-reference/chat) or [Responses APIs](https://platform.openai.com/docs/api-reference/responses) to fit your specific use case.

174 127 

182The Codex CLI and IDE extension use the same `config.toml` [configuration file](https://developers.openai.com/codex/config-basic). To specify a model, add a `model` entry to your configuration file. If you don't specify a model, the Codex app, CLI, or IDE Extension defaults to a recommended model.135The Codex CLI and IDE extension use the same `config.toml` [configuration file](https://developers.openai.com/codex/config-basic). To specify a model, add a `model` entry to your configuration file. If you don't specify a model, the Codex app, CLI, or IDE Extension defaults to a recommended model.

183 136 

184```137```

185model = "gpt-5.2"138model = "gpt-5.4"

186```139```

187 140 

188### Choosing a different local model temporarily141### Choosing a different local model temporarily

192To start a new Codex CLI thread with a specific model or to specify the model for `codex exec` you can use the `--model`/`-m` flag:145To start a new Codex CLI thread with a specific model or to specify the model for `codex exec` you can use the `--model`/`-m` flag:

193 146 

194```bash147```bash

195codex -m gpt-5.3-codex148codex -m gpt-5.4

196```149```

197 150 

198### Choosing your model for cloud tasks151### Choosing your model for cloud tasks