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AnthropicClaude Sonnet 4.6VSGoogleGemini 3 Flash

Analysis by:the whichllmmodel Editorial Team|Updated: June 2026

Our Take

Standardized reasoning and coding benchmarks are currently pending verification for one or both of these models. We recommend testing Claude Sonnet 4.6 and Gemini 3 Flash directly in their respective provider playgrounds to see which fits your specific prompt styles best.
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Model Specs

Claude Sonnet 4.6

Benchmarks & Scores

Coding (swe-bench-pro)
N/A

complex codebases, multi-file repositories, and architectural planning

Reasoning (gpqa-diamond)
79.9%

graduate-level science QA

Cost & Context

Cost (per 1M tokens)
$6.00Input: $3.00 | Output: $15.00
Context Window
1.05M tokens
Model Specs

Gemini 3 Flash

Benchmarks & Scores

Coding (swe-bench-verified)
78%

multi-file code and clearly defined tasks

Reasoning (gpqa-diamond)Winner (+10.5%)
90.4%

graduate-level science QA

Cost & Context

Cost (per 1M tokens)5.3x cheaper
$1.13Input: $0.50 | Output: $3.00
Context Window
1.05M tokens

Frequently Asked Questions about Claude Sonnet 4.6 vs Gemini 3 Flash

Gemini 3 Flash is cheaper than Claude Sonnet 4.6. Gemini 3 Flash has a blended cost of $1.13/1M tokens, which is about 5.3x cheaper than Claude Sonnet 4.6 at $6.00/1M tokens.

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