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[Bug] Antigravity thinking models fail with Google API error #9302
Description
Bug Description
Antigravity thinking models (e.g., google/antigravity-claude-opus-4-5-thinking) were working until recently but now fail with Google API errors.
Error Message
Invalid JSON payload received. Unknown name "thinking" at 'request.contents[75].parts[0]': Cannot find field.
Debug Info
- Requested Model: antigravity-claude-opus-4-5-thinking
- Endpoint: https://daily-cloudcode-pa.sandbox.googleapis.com/v1internal:streamGenerateContent
- Status: 400
Environment
- Plugin: opencode-antigravity-auth@beta
- OS version: macOS Sequoia 15.7.4
- OpenCode version: 1.1.25
Expected vs Actual
- Expected: Thinking models work as before
- Actual: Google API rejects thinking parameters
Workaround
Non-thinking models still work (e.g., google/antigravity-claude-sonnet-4-5)
This appears to be a recent regression in the Antigravity plugin's Google API integration.
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github-actions commentedon Jan 18, 2026
This issue might be a duplicate of existing issues. Please check:
Both issues report Google API 400 errors with invalid payload formats when using antigravity models. Feel free to ignore if this addresses a specific case with thinking models that isn't covered by #8857.
rekram1-node commentedon Jan 18, 2026
Mind closing here since this support most likely is due to ur plugin?
chindris-mihai-alexandru commentedon Jan 18, 2026
done