Gemini 3.1 Pro
Google's generally available successor to Gemini 3 Pro
Gemini 3.1 Pro is Google’s generally available successor to Gemini 3 Pro, released February 19, 2026 with a 1 million token context window and up to 64,000 tokens of output across text, image, video, and audio. Google reports 80.6 percent on SWE-bench Verified, 94.3 percent on GPQA Diamond, and 77.1 percent on ARC-AGI-2, where it placed second behind OpenAI’s GPT-5.5. Pricing held at $2.00 per million input tokens and $12.00 per million output tokens for prompts under 200,000 tokens, doubling to $4.00/$18.00 beyond that threshold, with cached input available at $0.20 per million. It’s available through the Gemini app, Google AI Studio, Vertex AI, and the Gemini API, and it remained Google’s flagship model until Gemini 3.5 Pro’s rollout later in 2026.