Models
Pass any of the supported model identifiers in the modelId field on project or message create calls. If omitted, requests use gpt-6.1-terra.
Available models
| ID | Provider | Label | Images |
|---|---|---|---|
| gpt-6.1-terra | openai | GPT-6.1 Terra | ✓ |
| claude-opus-5-5 | anthropic | Claude Opus 5.5 | ✓ |
| claude-sonnet-5-5 | anthropic | Claude Sonnet 5.5 | ✓ |
| claude-fable-5-1 | anthropic | Claude Fable 5.1 | ✓ |
Choosing a model
gpt-6.1-terra (the default) is fast and affordable and handles most apps well, at medium reasoning. Use claude-opus-5-5 for the most demanding builds, claude-sonnet-5-5 for quick edits, and claude-fable-5-1 when cost matters least. Retired ids such as gpt-5.5 and claude-opus-4-7 are still accepted and map to their current successor.
json{ "prompt": "Add a delete button to each todo", "modelId": "claude-sonnet-5-5" }