When was Claude 3.5 Sonnet released?

Claude 3.5 Sonnet was released by Anthropic on Jun 20 2024.

When was Gemini 3.1 Pro released?

Gemini 3.1 Pro was released by Google on Feb 19 2026.

Which is better on GPQA Diamond, Claude 3.5 Sonnet or Gemini 3.1 Pro?

Gemini 3.1 Pro scores higher on GPQA Diamond — Claude 3.5 Sonnet 59.4% vs Gemini 3.1 Pro 94.3%.

Which is better at coding, Claude 3.5 Sonnet or Gemini 3.1 Pro?

On SWE-Bench Verified (real-world software-engineering tasks), Gemini 3.1 Pro leads — Claude 3.5 Sonnet scores 33.4% and Gemini 3.1 Pro scores 80.6%.

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Home/Compare/Claude 3.5 Sonnet vs Gemini 3.1 Pro

Claude 3.5 Sonnet vs Gemini 3.1 Pro

0 vs 2 benchmarks won

	Anthropic Claude 3.5 Sonnet	Google Gemini 3.1 Pro
Overview
Company	Anthropic	Google
Release date	Jun 20 2024	Feb 19 2026
Model type	—	—
Open source	No	No
Specifications
Parameters	—	—
Context window	—	—
Benchmarks
Science reasoning GPQA Diamond	59.4%	94.3%
Software engineering SWE-Bench Verified	33.4%	80.6%
Multimodal understanding MMMU	—	—
Timeline
Release gap	Claude 3.5 Sonnet shipped 609 days before Gemini 3.1 Pro

Which is better: Claude 3.5 Sonnet or Gemini 3.1 Pro?

Gemini 3.1 Pro leads Claude 3.5 Sonnet on 2 of the tracked benchmarks (GPQA Diamond, SWE-Bench Verified, MMMU). Claude 3.5 Sonnet shipped 609 days before Gemini 3.1 Pro, so benchmark comparisons should account for the intervening progress.

Published specifications for these two models are limited — see each model page for the latest details.

On GPQA Diamond, Gemini 3.1 Pro scores 94.3%, 34.9 points above Claude 3.5 Sonnet at 59.4%. On SWE-Bench Verified, Gemini 3.1 Pro scores 80.6%, 47.2 points above Claude 3.5 Sonnet at 33.4%.

Frequently asked questions

When was Claude 3.5 Sonnet released?: Claude 3.5 Sonnet was released by Anthropic on Jun 20 2024.
When was Gemini 3.1 Pro released?: Gemini 3.1 Pro was released by Google on Feb 19 2026.
Which is better on GPQA Diamond, Claude 3.5 Sonnet or Gemini 3.1 Pro?: Gemini 3.1 Pro scores higher on GPQA Diamond — Claude 3.5 Sonnet 59.4% vs Gemini 3.1 Pro 94.3%.
Which is better at coding, Claude 3.5 Sonnet or Gemini 3.1 Pro?: On SWE-Bench Verified (real-world software-engineering tasks), Gemini 3.1 Pro leads — Claude 3.5 Sonnet scores 33.4% and Gemini 3.1 Pro scores 80.6%.