developer-roadmap/roadmaps/codex/content/codex-models@29xiIXYlB0bjXKA794qap.md

Codex Models

Codex works with the GPT-6 model family, and each model suits a different kind of work. Astra is the most capable, Sol handles long-running work at a lower cost, Terra is fast with strong visual understanding and computer use, and Luna is the most efficient for high-volume tasks. You pick one with /model, the --model flag, or model in config.toml. Model names and retirements change often, so check the models page for the current list.

Visit the following resources to learn more:

• @official@Models
• @official@Model selection