app/features.md Codex Docs, 2026-04-21 18:29 UTC → 2026-05-02 06:45 UTC

4with built-in worktree support, automations, and Git functionality.4with built-in worktree support, automations, and Git functionality.

5 5 

6Most Codex app features are available on both macOS and Windows.6Most Codex app features are available on both macOS and Windows.

7Platform-specific exceptions are noted below.7The sections below note platform-specific exceptions.

8 8 

9---9---

10 10 

146Use browser comments to mark specific elements or areas on a page, then ask146Use browser comments to mark specific elements or areas on a page, then ask

147Codex to address that feedback.147Codex to address that feedback.

148 148 

149When you want Codex to operate the page directly, use

150[browser use](https://developers.openai.com/codex/app/browser#browser-use) for local development servers and

151file-backed pages. You can manage the Browser plugin, allowed websites, and

152blocked websites from settings.

153 

149![Codex app showing a browser comment on a local web app preview](/images/codex/app/in-app-browser-light.webp)154![Codex app showing a browser comment on a local web app preview](/images/codex/app/in-app-browser-light.webp)

150 155 

151## Computer use156## Computer use

225opening separate projects or using worktrees rather than asking Codex to roam230opening separate projects or using worktrees rather than asking Codex to roam

226outside the project root.231outside the project root.

227 232 

233If [automatic review](https://developers.openai.com/codex/agent-approvals-security#automatic-approval-reviews)

234is available in your workspace, you can choose it from the permissions selector.

235It keeps the same sandbox boundary but routes eligible approval requests through

236the configured review policy instead of waiting for you.

237 

228For a high-level overview, see [sandboxing](https://developers.openai.com/codex/concepts/sandboxing). For238For a high-level overview, see [sandboxing](https://developers.openai.com/codex/concepts/sandboxing). For

229configuration details, see the239configuration details, see the

230[agent approvals & security documentation](https://developers.openai.com/codex/agent-approvals-security).240[agent approvals & security documentation](https://developers.openai.com/codex/agent-approvals-security).

250 260 

251You can ask in natural language or explicitly invoke the image generation skill by including `$imagegen` in your prompt.261You can ask in natural language or explicitly invoke the image generation skill by including `$imagegen` in your prompt.

252 262 

253Built-in image generation uses `gpt-image-1.5`, counts toward your general Codex usage limits, and uses included limits 3-5x faster on average than similar turns without image generation, depending on image quality and size. For details, see [Pricing](https://developers.openai.com/codex/pricing#image-generation-usage-limits). For prompting tips and model details, see the [image generation guide](https://developers.openai.com/api/docs/guides/image-generation).263Built-in image generation uses `gpt-image-2`, counts toward your general Codex usage limits, and uses included limits 3-5x faster on average than similar turns without image generation, depending on image quality and size. For details, see [Pricing](https://developers.openai.com/codex/pricing#image-generation-usage-limits). For prompting tips and model details, see the [image generation guide](https://developers.openai.com/api/docs/guides/image-generation).

254 264 

255For larger batches of image generation, set `OPENAI_API_KEY` in your environment variables and ask Codex to generate images through the API so API pricing applies instead.265For larger batches of image generation, set `OPENAI_API_KEY` in your environment variables and ask Codex to generate images through the API so API pricing applies instead.

256 266