A Codex skill for configuring GPT-5.6 defaults, especially gpt-5.6-sol with model_reasoning_effort = "medium".
Raw skill file: SKILL.md
Install or use the Codex skill from this URL: https://codex-use-gpt-5-6.pages.dev/SKILL.md
On first use, the agent should list the available models and reasoning efforts before editing config.
Available models: gpt-5.6-sol, gpt-5.6-terra, gpt-5.6-luna. Available reasoning efforts: low, medium, high, xhigh, max, ultra. Default recommendation: gpt-5.6-sol + medium.
Ask Codex one of these:
Use $codex-use-gpt-5-6 to configure Codex to use GPT-5.6 Sol with medium reasoning.
Use $codex-use-gpt-5-6 to switch my Codex default model to gpt-5.6-sol and set model_reasoning_effort to medium.
For stronger reasoning:
Use $codex-use-gpt-5-6 to switch Codex to gpt-5.6-sol with max reasoning.
Use $codex-use-gpt-5-6 to switch Codex to gpt-5.6-sol with ultra reasoning.
After installing the skill, restart or refresh Codex App if $codex-use-gpt-5-6 is not recognized.
After persistent config is updated, start a new Codex task unless the current surface supports /model or a model picker. If the new task still does not use the expected model, restart or refresh Codex App.
mkdir -p ~/.codex/skills/codex-use-gpt-5-6 curl -fsSL https://codex-use-gpt-5-6.pages.dev/SKILL.md -o ~/.codex/skills/codex-use-gpt-5-6/SKILL.md