Gemini 3.1 Pro
Google's reasoning upgrade to Gemini 3, strong on coding and science benchmarks.
About
Gemini 3.1 Pro launched in preview on February 19, 2026 as a step forward in core reasoning over the original Gemini 3 Pro. Google characterized it as targeting practical applications in science, research, and engineering, and it replaced the 3 Pro preview endpoint as the default pro alias in March 2026.
On Google's reported benchmarks, the model achieved 77.1% on ARC-AGI-2 (more than double Gemini 3 Pro) and 80.6% on SWE-Bench Verified for autonomous software engineering. It is a closed model served through the Gemini API, AI Studio, and Vertex AI.
Specs
Context window
Pricing
Free quota
API access
Weights
Released
Benchmarks
Provider-reported unless a source says otherwise. Benchmarks are marketing-adjacent by nature — treat them as directional.
Use cases
Trust score — 9/10
Scored 9/10 (verified tier, metrics-v1). Evidence: Verified via vendor site/docs/GitHub and reputable coverage, wave 94; Trending score 90/100 from researcher assessment.