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Gemini 3.1 Pro Preview

Gemini 3.1 Pro Preview is the preview release of Google DeepMind's flagship Gemini 3.1 Pro, launched February 19, 2026 as a Transformer-based Mixture-of-Experts model tuned for deep reasoning, agentic coding and tool use. It is natively multimodal across text, image, video, audio and code, with a roughly 1M-token input context window and up to 65K output tokens, enough for entire codebases, long PDFs, or hours of audio/video in one prompt. It delivers a reported 2x-plus reasoning gain over Gemini 3 Pro and tops many tracked benchmarks, with strong instruction following and long-horizon agentic stability. Best for the most complex reasoning, synthesis and agentic engineering tasks where capability matters more than cost.

Input

Top p
01
Reasoning
Temperature
02
Max completion tokens
1200000
Ready to generateReady to generate

API Reference

POSThttps://api.token360.ai/v1/chat/completions
curl https://api.token360.ai/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer your-api-key" \
  -d '{
  "model": "gemini-3.1-pro-preview",
  "messages": [
    {
      "role": "user",
      "content": "Hello!"
    }
  ],
  "temperature": 0.7,
  "top_p": 1,
  "max_completion_tokens": 4096
}'