flagshipReleased 2026-02

Gemini 3.1 Pro

By Google · Flagship multimodal reasoning, 2M context.

Input / 1M

$2.00

Output / 1M

$12.00

Context

2M tokens

Max output

66K tokens

Gemini 3.1 Pro pricing

Gemini 3.1 Pro costs $2.00 per million input tokens and $12.00 per million output tokens at standard API rates, with cached input at $0.20/M. That makes it cheaper than 8 of 25 other tracked models on input.

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Gemini 3.1 Pro benchmarks

GPQA Diamond94.3%

ARC-AGI-277.1%

SWE-bench Verified80.6%

OSWorld-Verified76.2%

MMLU-Pro90.1%

Arena Elo1485

Ranks #4 on SWE-bench Verified among tracked models.

Specs

Maker: Google
Category: flagship
Released: 2026-02
Modalities: text, vision, audio, video
Open weights: No (proprietary API)
Context window: 2M tokens
Max output: 66K tokens

Official API docs ↗

Compare Gemini 3.1 Pro with

GPT-5.5

OpenAI · $5.00/$30.00 per 1M

GPT-5.4

OpenAI · $2.50/$15.00 per 1M

Claude Opus 4.8

Anthropic · $5.00/$25.00 per 1M

Claude Sonnet 4.6

Anthropic · $3.00/$15.00 per 1M

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Data verified 2026-06-20. Prices are standard USD API rates per 1M tokens.