Gemini 3.1 Pro Preview Custom Tools
Gemini 3.1 Pro Preview Custom Tools is an API-only (closed weights) language model from Google, released February 19, 2026. The context window is 1M tokens. API price: $2 input / $12 output per million tokens.
Check it against your own PC →
Lab
Google
Released
February 19, 2026
Weights
API-only (closed weights)
Parameters
–
Context
1M
Price / M tokens
$2 / $12 in / out
Epoch ECI
not yet rated
Benchmark results
Epoch AI has not published results for Gemini 3.1 Pro Preview Custom Tools yet. New models are usually evaluated within days to weeks.
More from Google
Gemini 4 Carbon · Gemini 4 Argon · Gemini 3.8 Flash · Gemini 3.7 Flash · Gemini 3.6 Flash · Gemini 3.5 Flash-Lite · Gemini 3.5 Flash Cyber · Gemma 4 E4B