How much does Gemini 3.1 Pro cost?

Gemini 3.1 Pro costs $2 per million input tokens and $12 per million output tokens. The blended average is $7.00 per million tokens.

What is the context window of Gemini 3.1 Pro?

Gemini 3.1 Pro supports a context window of 1000K tokens (1,000,000 tokens) and can generate up to 66K output tokens per request.

What is Gemini 3.1 Pro best for?

Gemini 3.1 Pro is best for: Science & long-context. It supports chat, vision, function_calling, code, reasoning, audio capabilities.

Gemini 3.1 Pro — Pricing, Benchmarks & Specs

Gemini 3.1 Pro

Googleflagship

Tied at the top of the LMArena text leaderboard May 2026 @ ~1505 Elo. GPQA Diamond 94.3%, MMLU-Pro 91.0% — current scientific reasoning leader. 1M token context; fastest frontier model at ~131 tok/s.

Context Window

tokens

Max Output

66K

tokens

Input Price

per 1M tokens

Output Price

$12

per 1M tokens

Speed

131

tokens/sec

Released

Apr 2026

2026-04-09

Blended Cost

$7.00

per 1M tokens

Value Score

13.7

quality per $

Capabilities

ChatVisionFunction CallingCode GenerationReasoningAudio

Benchmarks

Quality Index

MMLU Pro

HumanEval (Coding)

93.2

MATH

92.4

Arena ELO

1505

Try in Playground Use via Swfte Connect Google Docs

Compare With

Quality: 91·$45.00/1M

About Gemini 3.1 Pro

Gemini 3.1 Pro is a flagship AI model by Google, released on April 9, 2026. It supports a context window of 1000K tokens and can generate up to 66K output tokens.

At $2 per million input tokens and $12 per million output tokens, its blended cost of $7.00/1M tokens places it in the premium pricing tier. Its value score of 13.7 reflects the balance of quality and cost.

Using Gemini 3.1 Pro with Swfte

Access Gemini 3.1 Pro through Swfte Connect, our unified LLM gateway. Connect gives you a single API for 50+ models, with automatic routing, cost optimization, and fallback handling. You can also try Gemini 3.1 Pro in our AI Playground before integrating.