OpenAI - Codex Docs Changes

ambassadors.md +0 −58 deleted

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~~1# Codex Ambassadors~~

~~3Codex is rapidly becoming one of the most powerful ways to build,~~

~~4driven by builders who share real-world workflows and lessons with~~

~~5each other.~~

~~7Codex Ambassadors are community organizers, open-source maintainers,~~

~~8student leaders, and power users who actively spread what works, make~~

~~9Codex easier to adopt in practice, and help shape where it goes next.~~

~~11[Apply Today](https://openai.com/form/codex-ambassadors)~~

~~13[Upcoming Meetups](https://developers.openai.com/codex/community/meetups)~~

15![Codex Ambassadors leading a community workshop](/images/codex/ambassadors/ambassadors-18.jpg) ![Builders collaborating during a Codex Ambassador event](/images/codex/ambassadors/ambassadors-25.jpg)

~~17Ambassadors run hands-on meetups, workshops, and community sessions~~

~~18around the world.~~

~~20## What you’ll do~~

~~22As a Codex Ambassador, you’ll join a small global cohort and partner~~

~~23with OpenAI to:~~

~~25- Run hands-on Codex events in your local community~~

~~26- Create reusable learning assets others can build on~~

~~27- Experiment with ideas to grow and support builder communities~~

~~28- Share candid, real-world feedback directly with the Codex team~~

~~30## Who should apply~~

~~32We’re looking for people with hands-on experience leading or~~

~~33supporting developer communities, like running meetups, maintaining~~

~~34open-source projects, teaching workshops, or regularly helping~~

~~35others learn how to build.~~

~~37## Support from OpenAI~~

~~39- Codex credits to support your own work and power local events~~

~~40- Ready-to-use starter kits you can tailor to your community~~

~~41- A direct line to fellow Ambassadors and the Codex team for~~

~~42 collaboration and feedback~~

~~43- Invitations to future exclusive events where you can meet the~~

~~44 Codex team~~

~~45- Exclusive swag and a honorarium for your time and contributions~~

~~47This is a two-way program, and will also evolve our support based on~~

~~48what the cohort learns on the ground.~~

~~50**Time commitment:** ~2–4 hours per week~~

~~52## Bring your community with you~~

~~54If you like bringing people together to build, learn, and share,~~

~~55and you're excited to help shape what a great ambassador program~~

~~56can be, we'd love to hear from you.~~

~~58[Start your application](https://openai.com/form/codex-ambassadors)~~

cli/features.md +6 −1

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46 46

47## Models and reasoning47## Models and reasoning

48 48

49For most tasks in Codex, `gpt-5.4` is the recommended model. It brings the industry-leading coding capabilities of `gpt-5.3-codex` to OpenAI’s flagship frontier model, combining frontier coding performance with stronger reasoning, native computer use, and broader professional workflows. For extra fast tasks, ChatGPT Pro subscribers have access to the GPT-5.3-Codex-Spark model in research preview.49For most tasks in Codex, `gpt-5.4` is the recommended model. It brings the

50industry-leading coding capabilities of `gpt-5.3-codex` to OpenAI’s flagship

51frontier model, combining frontier coding performance with stronger reasoning,

52native computer use, and broader professional workflows. For extra fast tasks,

53ChatGPT Pro subscribers have access to the GPT-5.3-Codex-Spark model in

54research preview.

50 55

51Switch models mid-session with the `/model` command, or specify one when launching the CLI.56Switch models mid-session with the `/model` command, or specify one when launching the CLI.

52 57

codex.md +3 −3

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22 22

23 Learn more](https://developers.openai.com/codex/explore) [### Community23 Learn more](https://developers.openai.com/codex/explore) [### Community

24 24

~~25Explore Codex Ambassadors and upcoming community meetups by location.~~25Read community posts, explore meetups, and connect with Codex builders.

26 26

~~27 See community](https://developers.openai.com/codex/community/meetups) [### Codex for OSS~~27 See community](/community) [### Codex for Open Source

28 28

29Apply or nominate maintainers for API credits, ChatGPT Pro with Codex, and selective Codex Security access.29Apply or nominate maintainers for API credits, ChatGPT Pro with Codex, and selective Codex Security access.

30 30

~~31 Learn more](https://developers.openai.com/codex/community/codex-for-oss)~~31 Learn more](https://developers.openai.com/community/codex-for-oss)

codex-for-oss-terms.md +1 −1

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1# Codex for Open Source Program Terms1# Codex for Open Source Program Terms

2 2

3These Program Terms govern the Codex for Open Source program (the “Program”) offered by OpenAI OpCo, LLC and its affiliates (“OpenAI,” “we,” “our,” or “us”). By submitting an application to the Program or accepting any Program benefit, you agree to these Program Terms.3These Program Terms govern the Codex for OSS program (the "Program") offered by OpenAI OpCo, LLC and its affiliates ("OpenAI," "we," "our," or "us"). By submitting an application to the Program or accepting any Program benefit, you agree to these Program Terms.

4 4

5These Program Terms supplement, and do not replace, the OpenAI Terms of Use, Privacy Policy, applicable service terms, and OpenAI policies that govern your use of ChatGPT, Codex, the API, and any other OpenAI services made available through the Program. If there is a conflict, these Program Terms control only with respect to the Program.5These Program Terms supplement, and do not replace, the OpenAI Terms of Use, Privacy Policy, applicable service terms, and OpenAI policies that govern your use of ChatGPT, Codex, the API, and any other OpenAI services made available through the Program. If there is a conflict, these Program Terms control only with respect to the Program.

6 6

community/codex-for-oss.md +0 −19 deleted

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~~1# Codex for Open Source~~

3Open-source maintainers do critical work, often behind the scenes, to keep the software ecosystem healthy. Over the past year, the Codex Open Source Fund ($1 million) has supported projects that need API credits, including teams using Codex to power GitHub pull request workflows. OpenAI is grateful to the maintainers who keep that work moving.

5The fund now supports eligible maintainers by offering six months of ChatGPT Pro with Codex and conditional access to Codex Security for core maintainers with write access. Developers should code in the tools they prefer, whether that’s Codex, [OpenCode](https://github.com/anomalyco/opencode), [Cline](https://github.com/cline/cline), [pi](https://github.com/badlogic/pi-mono/tree/main/packages/coding-agent), [OpenClaw](https://github.com/openclaw/openclaw), or something else, and this program supports that work.

~~7## What the program includes~~

~~9- Six months of ChatGPT Pro with Codex for day-to-day coding, triage, review, and maintainer workflows~~

~~10- Conditional access to Codex Security for repositories that need deeper security coverage~~

~~11- API credits through the Codex Open Source Fund for projects that use Codex in pull request review, maintainer automation, release workflows, or other core OSS work~~

~~13Given GPT-5.4’s capabilities, the team reviews Codex Security access case by case to ensure these workflows get the care and diligence they require.~~

~~15If you’re a core maintainer or run a widely used public project, apply. If your project doesn’t fit the criteria but it plays an important role in the ecosystem, apply anyway and explain why.~~

~~17By submitting an application, you agree to the [Codex for Open Source Program Terms](https://developers.openai.com/codex/codex-for-oss-terms).~~

~~19[Apply today!](https://openai.com/form/codex-for-oss/)~~

community/meetups.md +0 −17 deleted

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~~1# Codex Meetups~~

~~3Mar 17~~

~~5![Stylized city cover for San Francisco](https://developers.openai.com/codex/meetups/san-francisco.webp)~~

~~7UpcomingMar 17~~

~~9San Francisco, California, USA~~

~~11### Community Hackathon - San Francisco~~

~~13March 17, 2026~~

~~15Hosted by [Adam Chan](https://x.com/itsajchan)~~

~~17[Register now (opens in a new tab)](https://luma.com/openclaw-hack-night-mar17-2026)[Share city](https://developers.openai.com/codex/community/meetups?city=San%20Francisco)~~

concepts/subagents.md +9 −6

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1# Subagents1# Subagents

2 2

3Codex can run subagent workflows by spawning specialized agents in parallel so3Codex can run subagent workflows by spawning specialized agents in parallel so

~~4they can explore, execute, or analyze work concurrently.~~4they can explore, tackle, or analyze work concurrently.

5 5

6This page explains the core concepts and tradeoffs. For setup, agent configuration, and examples, see [Subagents](https://developers.openai.com/codex/subagents).6This page explains the core concepts and tradeoffs. For setup, agent configuration, and examples, see [Subagents](https://developers.openai.com/codex/subagents).

7 7

65 65

66If you don't pin a model or `model_reasoning_effort`, Codex can choose a setup66If you don't pin a model or `model_reasoning_effort`, Codex can choose a setup

67that balances intelligence, speed, and price for the task. It may favor67that balances intelligence, speed, and price for the task. It may favor

~~68`gpt-5.3-codex-spark` for fast scans or a higher-effort `gpt-5.4`~~68`gpt-5.4-mini` for fast scans or a higher-effort `gpt-5.4`

~~69configuration for harder reasoning. When you want finer control, steer that~~69configuration for more demanding reasoning. When you want finer control, steer that

70choice in your prompt or set `model` and `model_reasoning_effort` directly in70choice in your prompt or set `model` and `model_reasoning_effort` directly in

71the agent file.71the agent file.

72 72

~~73For most tasks in Codex, start with `gpt-5.4`. Use `gpt-5.3-codex-spark` when~~73For most tasks in Codex, start with `gpt-5.4`. Use `gpt-5.4-mini` when you

~~74you want a faster option for lighter subagent work.~~74want a faster, lower-cost option for lighter subagent work. If you have

75ChatGPT Pro and want near-instant text-only iteration, `gpt-5.3-codex-spark`

76remains available in research preview.

75 77

76### Model choice78### Model choice

77 79

78- **`gpt-5.4`**: Start here for most agents. It combines strong coding, reasoning, tool use, and broader workflows. The main agent and agents that coordinate ambiguous or multi-step work fit here.80- **`gpt-5.4`**: Start here for most agents. It combines strong coding, reasoning, tool use, and broader workflows. The main agent and agents that coordinate ambiguous or multi-step work fit here.

79- **`gpt-5.3-codex-spark`**: Use for agents that favor speed over depth, such as exploration, read-heavy scans, or quick summarization tasks. It works well for parallel workers that return distilled results to the main agent.81- **`gpt-5.4-mini`**: Use for agents that favor speed and efficiency over depth, such as exploration, read-heavy scans, large-file review, or processing supporting documents. It works well for parallel workers that return distilled results to the main agent.

82- **`gpt-5.3-codex-spark`**: If you have ChatGPT Pro, use this research preview model for near-instant, text-only iteration when latency matters more than broader capability.

80 83

81### Reasoning effort (`model_reasoning_effort`)84### Reasoning effort (`model_reasoning_effort`)

82 85

mcp.md +1 −1

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117 117

118The list of MCP servers keeps growing. Here are a few common ones:118The list of MCP servers keeps growing. Here are a few common ones:

119 119

120- [OpenAI Docs MCP](/resources/docs-mcp): Search and read OpenAI developer docs.120- [OpenAI Docs MCP](/learn/docs-mcp): Search and read OpenAI developer docs.

121- [Context7](https://github.com/upstash/context7): Connect to up-to-date developer documentation.121- [Context7](https://github.com/upstash/context7): Connect to up-to-date developer documentation.

122- Figma [Local](https://developers.figma.com/docs/figma-mcp-server/local-server-installation/) and [Remote](https://developers.figma.com/docs/figma-mcp-server/remote-server-installation/): Access your Figma designs.122- Figma [Local](https://developers.figma.com/docs/figma-mcp-server/local-server-installation/) and [Remote](https://developers.figma.com/docs/figma-mcp-server/remote-server-installation/): Access your Figma designs.

123- [Playwright](https://www.npmjs.com/package/@playwright/mcp): Control and inspect a browser using Playwright.123- [Playwright](https://www.npmjs.com/package/@playwright/mcp): Control and inspect a browser using Playwright.

models.md +28 −3

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26 26

27API Access27API Access

28 28

29![gpt-5.4-mini](/images/api/models/gpt-5-mini.jpg)

31gpt-5.4-mini

33Fast, efficient mini model for responsive coding tasks and subagents.

35codex -m gpt-5.4-mini

37Copy command

39Capability

41Speed

43Codex CLI & SDK

45Codex app & IDE extension

47Codex Cloud

49ChatGPT Credits

51API Access

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

30 54

31gpt-5.3-codex55gpt-5.3-codex

76 100

77For most tasks in Codex, start with `gpt-5.4`. It combines strong coding,101For most tasks in Codex, start with `gpt-5.4`. It combines strong coding,

78reasoning, native computer use, and broader professional workflows in one102reasoning, native computer use, and broader professional workflows in one

~~79model. The `gpt-5.3-codex-spark` model is available in research preview for~~103model. Use `gpt-5.4-mini` when you want a faster, lower-cost option for

~~80ChatGPT Pro subscribers and is optimized for near-instant, real-time coding~~104lighter coding tasks or subagents. The `gpt-5.3-codex-spark` model remains

~~81iteration.~~105available in research preview for ChatGPT Pro subscribers and is optimized for

106near-instant, text-only iteration.

82 107

83## Alternative models108## Alternative models

84 109

open-source.md +1 −1

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2 2

3OpenAI develops key parts of Codex in the open. That work lives on GitHub so you can follow progress, report issues, and contribute improvements.3OpenAI develops key parts of Codex in the open. That work lives on GitHub so you can follow progress, report issues, and contribute improvements.

4 4

5If you maintain a widely used open-source project or want to nominate maintainers stewarding important projects, you can also [apply to the Codex open source program](https://developers.openai.com/codex/community/codex-for-oss) for API credits, ChatGPT Pro with Codex, and selective access to Codex Security.5If you maintain a widely used open-source project or want to nominate maintainers stewarding important projects, you can also [apply to the Codex for OSS program](https://developers.openai.com/community/codex-for-oss) for API credits, ChatGPT Pro with Codex, and selective access to Codex Security.

6 6

7## Open-source components7## Open-source components

8 8

overview.md +3 −3

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22 22

23 Learn more](https://developers.openai.com/codex/explore) [### Community23 Learn more](https://developers.openai.com/codex/explore) [### Community

24 24

~~25Explore Codex Ambassadors and upcoming community meetups by location.~~25Read community posts, explore meetups, and connect with Codex builders.

26 26

~~27 See community](https://developers.openai.com/codex/community/meetups) [### Codex for OSS~~27 See community](/community) [### Codex for Open Source

28 28

30 30

~~31 Learn more](https://developers.openai.com/codex/community/codex-for-oss)~~31 Learn more](https://developers.openai.com/community/codex-for-oss)

subagents.md +2 −2

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210```toml210```toml

211name = "docs_researcher"211name = "docs_researcher"

212description = "Documentation specialist that uses the docs MCP server to verify APIs and framework behavior."212description = "Documentation specialist that uses the docs MCP server to verify APIs and framework behavior."

213model = "gpt-5.3-codex-spark"213model = "gpt-5.4-mini"

214model_reasoning_effort = "medium"214model_reasoning_effort = "medium"

215sandbox_mode = "read-only"215sandbox_mode = "read-only"

216developer_instructions = """216developer_instructions = """

288```toml288```toml

289name = "code_mapper"289name = "code_mapper"

290description = "Read-only codebase explorer for locating the relevant frontend and backend code paths."290description = "Read-only codebase explorer for locating the relevant frontend and backend code paths."

291model = "gpt-5.3-codex-spark"291model = "gpt-5.4-mini"

292model_reasoning_effort = "medium"292model_reasoning_effort = "medium"

293sandbox_mode = "read-only"293sandbox_mode = "read-only"

294developer_instructions = """294developer_instructions = """

OpenAI - Codex Docs Changes 2026-03-17 00:33 UTC → 2026-03-18 00:36 UTC