Claude Sonnet 5.5 is here!
We've written a guide to building with it: • choose between Sonnet 5.5 and Opus 5.5 • migrate from Sonnet 5 and adjust the effort • use it in Claude Code
Claude Sonnet 5.5 is officially out.
Pricing stays at $2 per 1M input tokens and $10 per 1M output tokens. Opus 5.5 is priced at $4 and $20. Cache pricing: $2.50 for Sonnet 5.5 vs $5 for Opus 5.5. Anthropic says Sonnet 5.5 is over 30% faster than Sonnet 5 and can cost up to 30%
Sonnet 5.5 was just released yesterday, and there was one thing that shocked me!
Terminal-Bench 4.0 (agentic coding) Sonnet 5.5: 70.6% Opus 5.5: 66.4% So basically, Sonnet 5.5 beats Opus 5.5 in this benchmark. In several other benchmarks, Opus 5.5 still wins, but slightly
Even though it's the same song, the expression changes so much 😳 In Sonnet 5.5, which came out today
Even though it's the same song, the expression changes so much 😳 In Sonnet 5.5, which came out today, I created the lyric motion for "Ninety-Nine" made with Suno. The top is Sonnet 5.5 and the bottom is Opus 5.5. If you compare them, you'll notice that the way the characters appear, how they move, and the way they take the "pauses" on the screen are quite different. Rather than saying which is correct,…
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