Claude Sonnet 5 vs Qwen 2 72B

Head-to-head technical comparison of intelligence, capabilities, and API pricing.

Claude Sonnet 5

Anthropic

AI Mastery Index94

LMSYS Arena1356

Technical (MMLU-Pro)94%

Cost per 1M Tokens$2

Qwen 2 72B

Alibaba

AI Mastery Index83.2

LMSYS Arena1245

Technical (MMLU-Pro)86.5%

Cost per 1M Tokens$0

Architect's Verdict

When comparing Claude Sonnet 5 and Qwen 2 72B, Claude Sonnet 5 edges out in overall capabilities according to the AI Mastery Index. However, for cost-sensitive workloads, Qwen 2 72B offers a more economical API at $0 per 1M tokens. Your choice should depend heavily on whether you prioritize raw reasoning (MMLU) or scalable deployment economics.