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Claude Sonnet 4.6 vs Gemini 3.1 Pro

Comprehensive comparison between Anthropic's Claude Sonnet 4.6 and Google's Gemini 3.1 Pro. Compare pricing, performance, features, and user reviews.

claude sonnet vs geminisonnet vs gemini promid-tier ai comparison

Claude Sonnet 4.6

Anthropic

Anthropic's most capable Sonnet yet. 1M context window (beta), 30-50% faster than Sonnet 4.5, approaching Opus-level intelligence at 1/3 the cost. Default model on claude.ai. Excels at coding, computer use, agent planning, and long-context reasoning.

$3/$15per M tokens
Details

Gemini 3.1 Pro

Google

Google's most advanced Pro-tier model with 1M context, dynamic thinking, and the highest ARC-AGI-2 score (77.1%) among all models. Excels at multimodal reasoning across text, images, audio, and video. Best price-to-performance ratio among frontier models.

$2/$12per M tokens
Details

Specs Comparison

SpecificationClaude Sonnet 4.6Gemini 3.1 Pro
Context Window1000K1000K
Max Output128K66K
Input (per 1M tokens)$3.00$2.00
Output (per 1M tokens)$15.00$12.00
Reasoning
Open Source

Scenario Score Comparison

Coding
—
vs
85
Writing
—
vs
86

Claude Sonnet 4.6

Pros

  • + 1M context window (beta)
  • + Near-Opus intelligence at Sonnet price
  • + 30-50% faster than Sonnet 4.5
  • + Human-level computer use capability
  • + Excellent for agentic workflows

Cons

  • − 1M context still in beta
  • − Some users report inconsistent reasoning
  • − Still not Opus for most complex tasks

Gemini 3.1 Pro

Pros

  • + Cheapest frontier model ($2/$12)
  • + Highest ARC-AGI-2 score (77.1%)
  • + Native multimodal (text/image/audio/video)
  • + 1M context window
  • + Free tier via AI Studio
  • + Best for frontend/web design

Cons

  • − Weaker at agentic tasks
  • − Context window issues reported
  • − Sometimes skips lines in code edits
  • − CLI/agent harness quality inconsistent

Recommendation

Choose Claude Sonnet 4.6 if you:

  • • Need 1m context window (beta)
  • • Need near-opus intelligence at sonnet price
  • • Need 30-50% faster than sonnet 4.5

Choose Gemini 3.1 Pro if you:

  • • Need cheapest frontier model ($2/$12)
  • • Need highest arc-agi-2 score (77.1%)
  • • Need native multimodal (text/image/audio/video)

Based on scores across 2 scenarios, Gemini 3.1 Pro performs better overall.

Claude Sonnet 4.6 Details Gemini 3.1 Pro Details

Get Started with Claude Sonnet 4.6

1Sign up at claude.ai (free)
2Sonnet is the default model
3Start chatting immediately

💡 Sonnet 4.6 is free to use on claude.ai.

Get Started with Gemini 3.1 Pro

1Visit gemini.google.com
2Sign in with Google account
3Upgrade to Advanced ($20/mo) for Pro

💡 Gemini Advanced is included in Google One AI Premium.

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