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Anthropic Claude Sonnet 5 VS OpenAI GPT-5 mini

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

Decision Recommendation

⚖️ Editorial Verdict: In our analysis, GPT-5 mini is the premium intelligence choice, scoring 17.5% 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 GPT-5 mini fully justifies the cost.
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Model Specs

Claude Sonnet 5

Benchmarks & Scores

Coding (swe-bench-pro)Winner (+17.5%)
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

GPT-5 mini

Benchmarks & Scores

Coding (swe-bench-pro)
45.7%

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

Reasoning (gpqa-diamond)
81.6%

graduate-level science QA

Cost & Performance

Cost (per 1M tokens)5.8x cheaper
$0.69Input: $0.25 | Output: $2.00
Context Window
400k tokens

Frequently Asked Questions about Claude Sonnet 5 vs GPT-5 mini comparison

GPT-5 mini is cheaper than Claude Sonnet 5. GPT-5 mini has a blended cost of $0.69/1M tokens, which is about 5.8x cheaper than Claude Sonnet 5 at $4.00/1M tokens.

Claude Sonnet 5 is better for coding tasks on this benchmark. It scores 63.2% on swe-bench-pro (excellent at multi-file repositories, autonomous agents, and industrial codebases) compared to GPT-5 mini which scores 45.7%.