models.md Codex Docs, 2026-02-19 20:37 UTC → 2026-04-02 18:23 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-5.4-mini](/images/api/models/gpt-5-mini.jpg)

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33gpt-5.3-codex-spark31gpt-5.4-mini

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35Text-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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37codex -m gpt-5.3-codex-spark35codex -m gpt-5.4-mini

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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](/images/codex/codex-wallpaper-1.webp)

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57gpt-5.2-codex55gpt-5.3-codex

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59Advanced 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.

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

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61Copy command

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63Capability

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65Speed

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67Codex CLI & SDK

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69Codex app & IDE extension

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71Codex Cloud

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73ChatGPT Credits

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75API Access

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

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79gpt-5.3-codex-spark

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81Text-only research preview model optimized for near-instant, real-time coding iteration. Available to ChatGPT Pro users.

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83codex -m gpt-5.3-codex-spark

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63Copy command85Copy command

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77API Access99API Access

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79For most coding tasks in Codex, start with gpt-5.3-codex. It is available for101For most tasks in Codex, start with `gpt-5.4`. It combines strong coding,

80ChatGPT-authenticated Codex sessions in the Codex app, CLI, IDE extension, and102reasoning, native computer use, and broader professional workflows in one

81Codex Cloud. API access for GPT-5.3-Codex will come soon. The103model. Use `gpt-5.4-mini` when you want a faster, lower-cost option for

82gpt-5.3-codex-spark model is available in research preview for ChatGPT Pro104lighter coding tasks or subagents. The `gpt-5.3-codex-spark` model is

83subscribers.105available in research preview for ChatGPT Pro subscribers and is optimized for

106near-instant, real-time coding iteration.

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85## Alternative models108## 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)110![gpt-5.2-codex](/images/codex/gpt-5.2-codex.png)

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112gpt-5.2-codex

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114Advanced coding model for real-world engineering. Succeeded by GPT-5.3-Codex.

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116codex -m gpt-5.2-codex

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118Copy command

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120Show details

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

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89gpt-5.2124gpt-5.2

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91Our best general agentic model for tasks across industries and domains.126Previous general-purpose model for coding and agentic tasks across industries and domains. Succeeded by GPT-5.4.

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93codex -m gpt-5.2128codex -m gpt-5.2

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97Show details132Show 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)134![gpt-5.1-codex-max](/images/api/models/gpt-5.1-codex-max.jpg)

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101gpt-5.1-codex-max136gpt-5.1-codex-max

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109Show details144Show details

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111![gpt-5.1](https://cdn.openai.com/API/docs/images/model-page/model-art/gpt-5.1.jpg)146![gpt-5.1](/images/api/models/gpt-5.1.jpg)

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113gpt-5.1148gpt-5.1

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121Show details156Show 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)158![gpt-5.1-codex](/images/api/models/gpt-5.1-codex.jpg)

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125gpt-5.1-codex160gpt-5.1-codex

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133Show details168Show details

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135![gpt-5-codex](https://cdn.openai.com/API/docs/images/model-page/model-art/gpt-5-codex.jpg)170![gpt-5-codex](/images/api/models/gpt-5-codex.jpg)

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137gpt-5-codex172gpt-5-codex

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145Show details180Show 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)182![gpt-5-codex-mini](/images/api/models/gpt-5-codex.jpg)

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149gpt-5-codex-mini184gpt-5-codex-mini

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157Show details192Show details

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159![gpt-5](https://cdn.openai.com/API/docs/images/model-page/model-art/gpt-5.jpg)194![gpt-5](/images/api/models/gpt-5.jpg)

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161gpt-5196gpt-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.219The 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```221```

187model = "gpt-5.2"222model = "gpt-5.4"

188```223```

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190### Choosing a different local model temporarily225### 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:229To 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```bash231```bash

197codex -m gpt-5.3-codex232codex -m gpt-5.4

198```233```

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200### Choosing your model for cloud tasks235### Choosing your model for cloud tasks