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Claude Sonnet 4.6 vs Gemini 3.1 Pro Preview Custom Tools

How do these models stack up? Below is an expert side-by-side comparison of specifications, context window capacity, live pricing per million tokens, and standardized benchmark scores for Claude Sonnet 4.6 and Gemini 3.1 Pro Preview Custom Tools.

Anthropic

Claude Sonnet 4.6

Sonnet 4.6 is Anthropic's most capable Sonnet-class model yet, with frontier performance across coding, agents, and professional work. It excels at iterative development, complex codebase navigation, end-to-end project management with...

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Google

Gemini 3.1 Pro Preview Custom Tools

Gemini 3.1 Pro Preview Custom Tools is a variant of Gemini 3.1 Pro that improves tool selection behavior by preventing overuse of a general bash tool when more efficient third-party...

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Technical Specifications

SpecificationClaude Sonnet 4.6Gemini 3.1 Pro Preview Custom Tools
ProviderAnthropicGoogle
Context Window1,000,000 tokens1,048,756 tokens
Agent Suitability94/100N/A
Time to First Token (TTFT)350 msN/A
Deployment Modelmanaged apimanaged api
Production Stabilitystablebeta
API AvailableYesYes
Released Date2026-02-172026-02-25

API Pricing Comparison

Input Price per Million Tokens

Claude Sonnet 4.6

$3.00

Gemini 3.1 Pro Preview Custom Tools

$2.00

Output Price per Million Tokens

Claude Sonnet 4.6

$15.00

Gemini 3.1 Pro Preview Custom Tools

$12.00

Want to test both models live?

Run side-by-side prompt prompts in our dynamic Sandbox. Check execution speeds, latency metrics, and compute actual costs in real-time.

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Benchmark Performance Metrics

Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.

MMLUGeneral knowledge & multi-task understanding
9040.0%vsN/A
Claude Sonnet 4.6
Gemini 3.1 Pro Preview Custom Tools
HumanEvalPython coding & logic synthesis
9370.0%vsN/A
Claude Sonnet 4.6
Gemini 3.1 Pro Preview Custom Tools
MATHComplex mathematical problem solving
8230.0%vsN/A
Claude Sonnet 4.6
Gemini 3.1 Pro Preview Custom Tools
GPQAGraduate-level expert reasoning
6500.0%vsN/A
Claude Sonnet 4.6
Gemini 3.1 Pro Preview Custom Tools
HellaSwagCommonsense reasoning and inference
9600.0%vsN/A
Claude Sonnet 4.6
Gemini 3.1 Pro Preview Custom Tools
MT-BenchMulti-turn conversation flow quality
940.0%vsN/A
Claude Sonnet 4.6
Gemini 3.1 Pro Preview Custom Tools

Claude Sonnet 4.6 Quirks & Gotchas

  • ▸Best balance of speed and capability — default for most Claude integrations
  • ▸Computer-use (beta) feature enables autonomous UI interaction

Gemini 3.1 Pro Preview Custom Tools Quirks & Gotchas

No developer gotchas reported.