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Anthropic Claude Sonnet 5 VS Google Gemini 2.5 Pro

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

Decision Recommendation

⚖️ Editorial Verdict: In our analysis, Gemini 2.5 Pro is the premium intelligence choice, scoring 3.6% higher on coding benchmarks. It also maintains strong cost efficiency. If you are building high-volume, simple chatbots or processing massive amounts of text where budget is critical, Claude Sonnet 5 offers excellent cost savings. For agentic reasoning, code refactoring, or complex logical tasks, the accuracy premium of Gemini 2.5 Pro fully justifies the cost.
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Model Specs

Claude Sonnet 5

Benchmarks & Scores

Coding (swe-bench-pro)
63.2%

excellent at multi-file repositories, autonomous agents, and industrial codebases

Reasoning (gpqa-diamond)
N/A

graduate-level science QA

Cost & Performance

Cost (per 1M tokens)
$4.00Input: $2.00 | Output: $10.00
Context WindowLarger
1.05M tokens
Model Specs

Gemini 2.5 Pro

Benchmarks & Scores

Coding (swe-bench-verified)
59.6%

good at editing existing code, cross-file updates, and multi-component systems

Reasoning (gpqa-diamond)
84.4%

graduate-level science QA

Cost & Performance

Cost (per 1M tokens)1.2x cheaper
$3.44Input: $1.25 | Output: $10.00
Context Window
1M tokens

Frequently Asked Questions about Claude Sonnet 5 vs Gemini 2.5 Pro comparison

Gemini 2.5 Pro is cheaper than Claude Sonnet 5. Gemini 2.5 Pro has a blended cost of $3.44/1M tokens, which is about 1.2x cheaper than Claude Sonnet 5 at $4.00/1M tokens.

For coding tasks, Claude Sonnet 5 scores 63.2% on swe-bench-pro (excellent at multi-file repositories, autonomous agents, and industrial codebases), while Gemini 2.5 Pro scores 59.6% on swe-bench-verified (good at editing existing code, cross-file updates, and multi-component systems).