fix: typos in model picker (#6859)

# External (non-OpenAI) Pull Request Requirements

Before opening this Pull Request, please read the dedicated
"Contributing" markdown file or your PR may be closed:
https://github.com/openai/codex/blob/main/docs/contributing.md

If your PR conforms to our contribution guidelines, replace this text
with a detailed and high quality description of your changes.

Include a link to a bug report or enhancement request.

docs/config.md

@@ -64,7 +64,7 @@ Notes:
 The model that Codex should use.
 
 ```toml
-model = "gpt-5.1"  # overrides the default ("gpt-5.1-codex" on macOS/Linux, "gpt-5.1" on Windows)
+model = "gpt-5.1"  # overrides the default ("arcticfox" across platforms)
 ```
 
 ### model_providers
@@ -191,7 +191,7 @@ model = "mistral"
 
 ### model_reasoning_effort
 
-If the selected model is known to support reasoning (for example: `o3`, `o4-mini`, `codex-*`, `gpt-5.1`, `gpt-5.1-codex`), reasoning is enabled by default when using the Responses API. As explained in the [OpenAI Platform documentation](https://platform.openai.com/docs/guides/reasoning?api-mode=responses#get-started-with-reasoning), this can be set to:
+If the selected model is known to support reasoning (for example: `o3`, `o4-mini`, `codex-*`, `arcticfox`, `gpt-5.1`, `gpt-5.1-codex`), reasoning is enabled by default when using the Responses API. As explained in the [OpenAI Platform documentation](https://platform.openai.com/docs/guides/reasoning?api-mode=responses#get-started-with-reasoning), this can be set to:
 
 - `"minimal"`
 - `"low"`
@@ -835,7 +835,7 @@ Users can specify config values at multiple levels. Order of precedence is as fo
 1. custom command-line argument, e.g., `--model o3`
 2. as part of a profile, where the `--profile` is specified via a CLI (or in the config file itself)
 3. as an entry in `config.toml`, e.g., `model = "o3"`
-4. the default value that comes with Codex CLI (i.e., Codex CLI defaults to `gpt-5.1-codex`)
+4. the default value that comes with Codex CLI (i.e., Codex CLI defaults to `arcticfox`)
 
 ### history
 
@@ -938,7 +938,7 @@ Valid values:
 
 | Key                                              | Type / Values                                                     | Notes                                                                                                                      |
 | ------------------------------------------------ | ----------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------- |
-| `model`                                          | string                                                            | Model to use (e.g., `gpt-5.1-codex`).                                                                                      |
+| `model`                                          | string                                                            | Model to use (e.g., `arcticfox`).                                                                                          |
 | `model_provider`                                 | string                                                            | Provider id from `model_providers` (default: `openai`).                                                                    |
 | `model_context_window`                           | number                                                            | Context window tokens.                                                                                                     |
 | `model_max_output_tokens`                        | number                                                            | Max output tokens.                                                                                                         |

docs/example-config.md

@@ -18,12 +18,11 @@ Use this example configuration as a starting point. For an explanation of each f
 # Core Model Selection
 ################################################################################
 
-# Primary model used by Codex. Default differs by OS; non-Windows defaults here.
-# Linux/macOS default: "gpt-5.1-codex"; Windows default: "gpt-5.1".
-model = "gpt-5.1-codex"
+# Primary model used by Codex. Default: "arcticfox" on all platforms.
+model = "arcticfox"
 
-# Model used by the /review feature (code reviews). Default: "gpt-5.1-codex".
-review_model = "gpt-5.1-codex"
+# Model used by the /review feature (code reviews). Default: "arcticfox".
+review_model = "arcticfox"
 
 # Provider id selected from [model_providers]. Default: "openai".
 model_provider = "openai"
@@ -33,7 +32,7 @@ model_provider = "openai"
 # model_context_window = 128000       # tokens; default: auto for model
 # model_max_output_tokens = 8192      # tokens; default: auto for model
 # model_auto_compact_token_limit = 0  # disable/override auto; default: model family specific
-# tool_output_token_limit = 10000  # tokens stored per tool output; default: 10000 for gpt-5.1-codex
+# tool_output_token_limit = 10000  # tokens stored per tool output; default: 10000 for arcticfox
 
 ################################################################################
 # Reasoning & Verbosity (Responses API capable models)
@@ -316,7 +315,7 @@ mcp_oauth_credentials_store = "auto"
 [profiles]
 
 # [profiles.default]
-# model = "gpt-5.1-codex"
+# model = "arcticfox"
 # model_provider = "openai"
 # approval_policy = "on-request"
 # sandbox_mode = "read-only"

docs/exec.md

@@ -99,7 +99,7 @@ codex exec resume --last "Fix use-after-free issues"
 Only the conversation context is preserved; you must still provide flags to customize Codex behavior.
 
 ```shell
-codex exec --model gpt-5.1-codex --json "Review the change, look for use-after-free issues"
+codex exec --model arcticfox --json "Review the change, look for use-after-free issues"
 codex exec --model gpt-5.1 --json resume --last "Fix use-after-free issues"
 ```