Anthropic made Sonnet 5 broadly available at $2/$10 per million tokens until August 31. I ran the routing math; it should be your default, not your ceiling.

Claude Sonnet 5 brings near-Opus 4.8 agentic performance at a mid-tier price, from $2/$10 per million tokens until August 31. Here's what is new.

Anthropic released Claude Sonnet 5, which beats its predecessor Sonnet 4.6 across all benchmarks and even edges past the larger Opus 4.8 on the GDPval-AA v2 knowledge work test…