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Checked Active: 2026-10-15
Anthropic
Claude Sonnet 5.5
Everyday coding, writing and drafting at half the price of Opus 5.5.
Evaluation Analysis: Per Fello AI (Oct 2026): leads Artificial Analysis' Terminal-Bench 4.0 run at 63.6% and LiveBench Coding at 91.4. Anthropic halved its cache read price to $0.10 per 1M tokens on Oct 7, 2026.
Context Window1M tokens (128K max output)
Input Price / 1M$2.00
Output Price / 1M$10.00
Release Date2026-09-28
Specs and prices checked 2026-10-15 against the official page.