Machine Heart

Jun 30, 2026 · Artificial Intelligence

Anthropic Releases Claude Sonnet 5: Near‑Opus 4.8 Performance and Stronger Agent Skills

Anthropic’s Claude Sonnet 5 arrives with markedly higher reasoning, tool‑use and programming abilities than Sonnet 4.6, closing the gap to Opus 4.8 while offering a lower price tier, improved safety scores, a new tokenizer that raises token counts, higher rate limits, and mixed developer cost feedback.