Anthropic ships Claude Sonnet 5.5, cheaper and faster
Sorted AI28 SeptAnthropic launched Claude Sonnet 5.5 as a faster, cheaper sibling to Sonnet 5 for everyday coding and agent work. List pricing is $2 / $10 per million input/output tokens, with Terminal-Bench at 70.6% versus 10.3% for an earlier baseline in their materials. The model id on the Claude Platform is claude-sonnet-5-5. Treat lab benches as directional and verify on your own tasks before switching production traffic.
Model pages:Claude Sonnet 5.5 (batch) →Claude Sonnet 5 (batch) →
Why it matters: If Sonnet 5 is your default coding model, Sonnet 5.5 is the first thing to A/B on cost and latency this week before you lock next month’s spend.
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