Claude Sonnet 5 'Fennec' Is Here — 82.1% SWE-Bench Sets New Coding Benchmark
Anthropic releases Claude Sonnet 5 codenamed Fennec with 82.1% SWE-Bench score, surpassing Opus 4.5. Optimized for Google's Antigravity TPU with 1M token context at $3/M input tokens.
