
GPT-5.5 vs Claude Sonnet 4.6 vs Gemini 3.1 Pro: Three concrete prompts be sent to GPT-5.5, Claude Sonnet 4.6, and Gemini 3.1 Pro through. Try CometAPI.

The Gemini 3.1 Pro is now available on CometAPI, and you can start using it through CometAPI's services—at a more affordable launch price than the official price. CometAPI already exposes the Gemini 3 family and provides an OpenAI-compatible path to call those models from a single unified gateway; that makes it quick to experiment with Gemini models using existing OpenAI SDKs