Claude Opus 4.6 vs Gemini 3.1 Pro

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

claude opus vs gemini probest ai 2026

Claude Opus 4.6

Anthropic

Anthropic's flagship model with 1M token context (beta), adaptive thinking, and the highest agentic coding scores. Introduced Agent Teams for parallel autonomous coding. Nearly doubled ARC-AGI-2 score over Opus 4.5 (68.8% vs 37.6%).

$5/$25per 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 Opus 4.6Gemini 3.1 Pro
Context Window1000K1000K
Max Output128K66K
Input (per 1M tokens)$5.00$2.00
Output (per 1M tokens)$25.00$12.00
Reasoning
Open Source

Scenario Score Comparison

Coding
96
vs
85
Writing
91
vs
86

Claude Opus 4.6

Pros

  • + Highest SWE-bench score (80.8%)
  • + 128K max output (doubled from 4.5)
  • + Adaptive thinking with effort levels
  • + Agent Teams for parallel coding
  • + Best instruction following in complex contexts

Cons

  • − 2x price of GPT-5.4
  • − Response prefilling removed (breaking change)
  • − 1M context in beta only
  • − Extended thinking deprecated

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 Opus 4.6 if you:

  • • Need highest swe-bench score (80.8%)
  • • Need 128k max output (doubled from 4.5)
  • • Need adaptive thinking with effort levels

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, Claude Opus 4.6 performs better overall.

Claude Opus 4.6 Details Gemini 3.1 Pro Details

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