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## What changed Replace the selectable personality templates in the bundled `gpt-5.4` and `gpt-5.5` definitions with fixed friendly instructions. Personality selection becomes unavailable for these models in the TUI, and submitted turns omit the personality override. Remove personality overrides from Python SDK examples and the walkthrough notebook. ## Testing Update core and TUI tests to cover fixed friendly instructions, ignored pragmatic updates, unavailable personality selection, and omitted turn overrides. Preserve coverage for selectable personalities in legacy catalogs, and add coverage for resumed legacy sessions and explicit empty instruction overrides. GitOrigin-RevId: 869a71445584272405fcbd1325efc31c224808c8
OpenAI Codex Python SDK
Build Python applications that start Codex threads, run turns, stream progress, and control workspace access.
Install
Install the SDK:
pip install openai-codex
Quickstart
The SDK reuses your existing Codex authentication when one is already available:
from openai_codex import Codex
with Codex() as codex:
thread = codex.thread_start()
result = thread.run("Explain this repository in three bullets.")
print(result.final_response)
thread.run(...) returns a TurnResult containing the final response,
collected items, and token usage.
Authentication
Existing Codex authentication is reused automatically. To start ChatGPT browser login explicitly:
from openai_codex import Codex
with Codex() as codex:
login = codex.login_chatgpt()
print(login.auth_url)
print(login.wait().success)
For device-code login:
with Codex() as codex:
login = codex.login_chatgpt_device_code()
print(login.verification_url, login.user_code)
login.wait()
For API-key login:
with Codex() as codex:
codex.login_api_key("sk-...")
Built-In Help
Use Python's standard help(openai_codex), help(Codex), or
python -m pydoc openai_codex documentation tools.
Documentation
The package is licensed under the repository Apache License 2.0.