Comparison of GPT-5.5, Claude Opus 4.7 and Gemini 3.1 Pro models in 2026

GPT-5.5 was released on April 23, 2026.

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Claude Opus 4.7 was launched on April 16, 2026.

Gemini 3.1 Pro has been in developer preview since February 19, 2026.

All three models target production use for agents and coding tools.

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