GPT-5.6 Luna is no longer offered for new selections. Agents already using it keep working.
What's New
- Existing agents - Agents using GPT-5.6 Luna continue to work; no change is required
- Recommended alternative - GPT-6 Luna is the recommended fast, low-cost model
- Every plan - GPT-6 Luna is available on every plan, including Free
Get Started
To switch, open your agent's Settings, choose GPT-6 Luna under AI Model, save your changes, and test the result in the Playground.