models.md Codex Docs, 2026-02-19 20:37 UTC → 2026-03-08 18:10 UTC

1# Codex Models1# Codex Models

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3Meet the AI models that power Codex

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5## Recommended models3## Recommended models

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

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9gpt-5.3-codex7gpt-5.4

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11Most 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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13codex -m gpt-5.3-codex11codex -m gpt-5.4

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15Copy command13Copy command

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29API Access27API Access

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31![gpt-5.3-codex-spark](/images/codex/codex-wallpaper-2.webp)29![gpt-5.3-codex](/images/codex/codex-wallpaper-1.webp)

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33gpt-5.3-codex-spark31gpt-5.3-codex

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35Text-only research preview model optimized for near-instant, real-time coding iteration. Available to ChatGPT Pro users.33Industry-leading coding model for complex software engineering. Its coding capabilities now also power GPT-5.4.

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37codex -m gpt-5.3-codex-spark35codex -m gpt-5.3-codex

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39Copy command37Copy command

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53API Access51API Access

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55![gpt-5.2-codex](/images/codex/gpt-5.2-codex.png)53![gpt-5.3-codex-spark](/images/codex/codex-wallpaper-2.webp)

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57gpt-5.2-codex55gpt-5.3-codex-spark

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59Advanced coding model for real-world engineering. Succeeded by GPT-5.3-Codex.57Text-only research preview model optimized for near-instant, real-time coding iteration. Available to ChatGPT Pro users.

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61codex -m gpt-5.2-codex59codex -m gpt-5.3-codex-spark

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63Copy command61Copy command

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77API Access75API Access

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79For most coding tasks in Codex, start with gpt-5.3-codex. It is available for77For most tasks in Codex, start with `gpt-5.4`. It combines strong coding,

80ChatGPT-authenticated Codex sessions in the Codex app, CLI, IDE extension, and78reasoning, native computer use, and broader professional workflows in one

81Codex Cloud. API access for GPT-5.3-Codex will come soon. The79model. The `gpt-5.3-codex-spark` model is available in research preview for

82gpt-5.3-codex-spark model is available in research preview for ChatGPT Pro80ChatGPT Pro subscribers and is optimized for near-instant, real-time coding

83subscribers.81iteration.

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85## Alternative models83## Alternative models

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87![gpt-5.2](https://cdn.openai.com/API/docs/images/model-page/model-art/gpt-5.2.jpg)85![gpt-5.2-codex](/images/codex/gpt-5.2-codex.png)

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87gpt-5.2-codex

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89Advanced coding model for real-world engineering. Succeeded by GPT-5.3-Codex.

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91codex -m gpt-5.2-codex

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93Copy command

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95Show details

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

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89gpt-5.299gpt-5.2

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91Our best general agentic model for tasks across industries and domains.101Previous general-purpose model for coding and agentic tasks across industries and domains. Succeeded by GPT-5.4.

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93codex -m gpt-5.2103codex -m gpt-5.2

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97Show details107Show details

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99![gpt-5.1-codex-max](https://cdn.openai.com/API/docs/images/model-page/model-art/gpt-5.1-codex-max.jpg)109![gpt-5.1-codex-max](/images/api/models/gpt-5.1-codex-max.jpg)

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101gpt-5.1-codex-max111gpt-5.1-codex-max

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109Show details119Show details

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111![gpt-5.1](https://cdn.openai.com/API/docs/images/model-page/model-art/gpt-5.1.jpg)121![gpt-5.1](/images/api/models/gpt-5.1.jpg)

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113gpt-5.1123gpt-5.1

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121Show details131Show details

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123![gpt-5.1-codex](https://cdn.openai.com/API/docs/images/model-page/model-art/gpt-5.1-codex.jpg)133![gpt-5.1-codex](/images/api/models/gpt-5.1-codex.jpg)

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125gpt-5.1-codex135gpt-5.1-codex

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133Show details143Show details

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135![gpt-5-codex](https://cdn.openai.com/API/docs/images/model-page/model-art/gpt-5-codex.jpg)145![gpt-5-codex](/images/api/models/gpt-5-codex.jpg)

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137gpt-5-codex147gpt-5-codex

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145Show details155Show details

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147![gpt-5-codex-mini](https://cdn.openai.com/API/docs/images/model-page/model-art/gpt-5-codex.jpg)157![gpt-5-codex-mini](/images/api/models/gpt-5-codex.jpg)

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149gpt-5-codex-mini159gpt-5-codex-mini

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157Show details167Show details

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159![gpt-5](https://cdn.openai.com/API/docs/images/model-page/model-art/gpt-5.jpg)169![gpt-5](/images/api/models/gpt-5.jpg)

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161gpt-5171gpt-5

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184The 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.194The 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.

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186```196```

187model = "gpt-5.2"197model = "gpt-5.4"

188```198```

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190### Choosing a different local model temporarily200### Choosing a different local model temporarily

194To 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:204To 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:

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196```bash206```bash

197codex -m gpt-5.3-codex207codex -m gpt-5.4

198```208```

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200### Choosing your model for cloud tasks210### Choosing your model for cloud tasks