AI · 1h ago
Claude Sonnet 5 vs Opus 5: Real-World Benchmark and Cost Guide
Anthropic released Claude Sonnet 5 on June 30 and Opus 5 on July 24, 2026. Sonnet 5 scores 72.7% on SWE-bench Verified, a 10.4-point jump over Sonnet 4.6, while Opus 5 leads on agentic benchmarks like Zapier's AutomationBench. The article advises using Sonnet 5 for volume tasks and Opus 5 for complex judgment calls, noting Anthropic used different test suites so direct comparisons are limited.
Meridian48 take
The practical routing advice is useful, but the lack of a head-to-head benchmark for Opus 5 means buyers must trust Anthropic's claims on newer, less standardized tests.
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