Claude Sonnet 5 came out this morning. I always head straight for the "what's new" developer docs because they tend to have more actionable information than the official announcement post. …

Claude Sonnet 5 is the most agentic Sonnet model yet, rivaling Opus 4.8 in performance at lower prices, Anthropic said.

Anthropic's Claude Sonnet 5, codenamed Fennec, is reportedly being prepared for release on OpenRouter after months of delays and speculation.