cli/features.md Codex Docs, 2026-02-20 12:16 UTC → 2026-04-10 18:23 UTC

20 20 

21- Send prompts, code snippets, or screenshots (see [image inputs](#image-inputs)) directly into the composer.21- Send prompts, code snippets, or screenshots (see [image inputs](#image-inputs)) directly into the composer.

22- Watch Codex explain its plan before making a change, and approve or reject steps inline.22- Watch Codex explain its plan before making a change, and approve or reject steps inline.

23- Read syntax-highlighted markdown code blocks and diffs in the TUI, then use `/theme` to preview and save a preferred theme.

24- Use `/clear` to wipe the terminal and start a fresh chat, or press <kbd>Ctrl</kbd>+<kbd>L</kbd> to clear the screen without starting a new conversation.

25- Use `/copy` to copy the latest completed Codex output. If a turn is still running, Codex copies the most recent finished output instead of in-progress text.

23- Navigate draft history in the composer with <kbd>Up</kbd>/<kbd>Down</kbd>; Codex restores prior draft text and image placeholders.26- Navigate draft history in the composer with <kbd>Up</kbd>/<kbd>Down</kbd>; Codex restores prior draft text and image placeholders.

24- Press <kbd>Ctrl</kbd>+<kbd>C</kbd> or use `/exit` to close the interactive session when you're done.27- Press <kbd>Ctrl</kbd>+<kbd>C</kbd> or use `/exit` to close the interactive session when you're done.

25 28 

43 46 

44## Models and reasoning47## Models and reasoning

45 48 

46For most coding tasks in Codex, `gpt-5.3-codex` is the go-to model. It’s available for ChatGPT-authenticated Codex sessions in the Codex app, CLI, IDE extension, and Codex Cloud. 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.

47 55 

48Switch 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.

49 57 

50```bash58```bash

51codex --model gpt-5.3-codex59codex --model gpt-5.4

52```60```

53 61 

54[Learn more about the models available in Codex](https://developers.openai.com/codex/models).62[Learn more about the models available in Codex](https://developers.openai.com/codex/models).

65 73 

66`codex features enable <feature>` and `codex features disable <feature>` write to `~/.codex/config.toml`. If you launch Codex with `--profile`, Codex stores the change in that profile rather than the root configuration.74`codex features enable <feature>` and `codex features disable <feature>` write to `~/.codex/config.toml`. If you launch Codex with `--profile`, Codex stores the change in that profile rather than the root configuration.

67 75 

68## Multi-agents (experimental)76## Subagents

69 77 

70Use Codex multi-agent workflows to parallelize larger tasks. For setup, role configuration (`[agents]` in `config.toml`), and examples, see [Multi-agents](https://developers.openai.com/codex/multi-agent).78Use Codex subagent workflows to parallelize larger tasks. For setup, role configuration (`[agents]` in `config.toml`), and examples, see [Subagents](https://developers.openai.com/codex/subagents).

79 

80Codex only spawns subagents when you explicitly ask it to. Because each

81subagent does its own model and tool work, subagent workflows consume more

82tokens than comparable single-agent runs.

71 83 

72## Image inputs84## Image inputs

73 85 

83 95 

84Codex accepts common formats such as PNG and JPEG. Use comma-separated filenames for two or more images, and combine them with text instructions to add context.96Codex accepts common formats such as PNG and JPEG. Use comma-separated filenames for two or more images, and combine them with text instructions to add context.

85 97 

98## Syntax highlighting and themes

99 

100The TUI syntax-highlights fenced markdown code blocks and file diffs so code is easier to scan during reviews and debugging.

101 

102Use `/theme` to open the theme picker, preview themes live, and save your selection to `tui.theme` in `~/.codex/config.toml`. You can also add custom `.tmTheme` files under `$CODEX_HOME/themes` and select them in the picker.

103 

86## Running local code review104## Running local code review

87 105 

88Type `/review` in the CLI to open Codex's review presets. The CLI launches a dedicated reviewer that reads the diff you select and reports prioritized, actionable findings without touching your working tree. By default it uses the current session model; set `review_model` in `config.toml` to override.106Type `/review` in the CLI to open Codex's review presets. The CLI launches a dedicated reviewer that reads the diff you select and reports prioritized, actionable findings without touching your working tree. By default it uses the current session model; set `review_model` in `config.toml` to override.

96 114 

97## Web search115## Web search

98 116 

99Codex ships with a first-party web search tool. For local tasks in the Codex CLI, Codex enables web search by default and serves results from a web search cache. The cache is an OpenAI-maintained index of web results, so cached mode returns pre-indexed results instead of fetching live pages. This reduces exposure to prompt injection from arbitrary live content, but you should still treat web results as untrusted. If you are using `--yolo` or another [full access sandbox setting](https://developers.openai.com/codex/security), web search defaults to live results. To fetch the most recent data, pass `--search` for a single run or set `web_search = "live"` in [Config basics](https://developers.openai.com/codex/config-basic). You can also set `web_search = "disabled"` to turn the tool off.117Codex ships with a first-party web search tool. For local tasks in the Codex CLI, Codex enables web search by default and serves results from a web search cache. The cache is an OpenAI-maintained index of web results, so cached mode returns pre-indexed results instead of fetching live pages. This reduces exposure to prompt injection from arbitrary live content, but you should still treat web results as untrusted. If you are using `--yolo` or another [full access sandbox setting](https://developers.openai.com/codex/agent-approvals-security), web search defaults to live results. To fetch the most recent data, pass `--search` for a single run or set `web_search = "live"` in [Config basics](https://developers.openai.com/codex/config-basic). You can also set `web_search = "disabled"` to turn the tool off.

100 118 

101You'll see `web_search` items in the transcript or `codex exec --json` output whenever Codex looks something up.119You'll see `web_search` items in the transcript or `codex exec --json` output whenever Codex looks something up.

102 120