models.md Codex Docs, 2026-03-05 00:34 UTC → 2026-04-23 12:28 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.

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

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13Copy command13Copy command

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27API Access27API Access

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

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

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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.

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

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37Copy command37Copy command

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50 50 

51API Access51API Access

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53The gpt-5.3-codex-spark model is available in research preview for ChatGPT Pro53![gpt-5.3-codex](/images/codex/codex-wallpaper-1.webp)

54subscribers. It is optimized for near-instant, real-time coding iteration.

55 

56## Alternative models

57 

58![gpt-5.2-codex](/images/codex/gpt-5.2-codex.png)

59 

60gpt-5.2-codex

61 

62Advanced coding model for real-world engineering. Succeeded by GPT-5.3-Codex.

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64codex -m gpt-5.2-codex

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66Copy command

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68Show details

69 

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

71 

72gpt-5.2

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74Our best general agentic model for tasks across industries and domains.

75 

76codex -m gpt-5.2

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78Copy command

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80Show details

81 

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

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84gpt-5.1-codex-max55gpt-5.3-codex

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86Optimized for long-horizon, agentic coding tasks in Codex.57Industry-leading coding model for complex software engineering. Its coding capabilities now also power GPT-5.4.

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88codex -m gpt-5.1-codex-max59codex -m gpt-5.3-codex

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90Copy command61Copy command

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92Show details63Capability

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94![gpt-5.1](/images/api/models/gpt-5.1.jpg)65Speed

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96gpt-5.167Codex CLI & SDK

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98Great for coding and agentic tasks across domains. Succeeded by GPT-5.2.69Codex app & IDE extension

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100codex -m gpt-5.171Codex Cloud

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102Copy command73ChatGPT Credits

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104Show details75API Access

105 76 

106![gpt-5.1-codex](/images/api/models/gpt-5.1-codex.jpg)77![gpt-5.3-codex-spark](/images/codex/codex-wallpaper-2.webp)

107 78 

108gpt-5.1-codex79gpt-5.3-codex-spark

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110Optimized 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.

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112codex -m gpt-5.1-codex83codex -m gpt-5.3-codex-spark

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114Copy command85Copy command

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116Show details87Capability

117 

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

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120gpt-5-codex

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122Version of GPT-5 tuned for long-running, agentic coding tasks. Succeeded by GPT-5.1-Codex.

123 

124codex -m gpt-5-codex

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126Copy command89Speed

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128Show details91Codex CLI & SDK

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

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132gpt-5-codex-mini95Codex Cloud

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134Smaller, more cost-effective version of GPT-5-Codex. Succeeded by GPT-5.1-Codex-Mini.97ChatGPT Credits

135 98 

136codex -m gpt-5-codex99API Access

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138Copy 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.

139 107 

140Show details108## Alternative models

141 109 

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

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144gpt-5112gpt-5.2

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146Reasoning 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.

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148codex -m gpt-5116codex -m gpt-5.2

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150Copy command118Copy command

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153 121 

154## Other models122## Other models

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156Codex works best with the models listed above.124When you sign in with ChatGPT, Codex works best with the models listed above.

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158You 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.

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167The 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.

168 136 

169```137```

170model = "gpt-5.2"138model = "gpt-5.4"

171```139```

172 140 

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

177To 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:

178 146 

179```bash147```bash

180codex -m gpt-5.3-codex148codex -m gpt-5.4

181```149```

182 150 

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