Claude Sonnet 5.5
by Anthropic · ID claude-sonnet-5-5 · Released 2026-09 · Proprietary
1477
ELO Score
-
MMLU
-
HumanEval
N/A
Context Window
$2.00
Input Price
About Claude Sonnet 5.5
The Sonnet tier of Anthropic's Claude 5.5 family, announced 28 September 2026 as the successor to Claude Sonnet 5. $2 input / $10 output per million tokens; cache hits cost $0.10, 0.05x the input price, the same discount as Opus 5.5. Prices checked 29 October 2026. Arena text score 1477 (Claude Sonnet 5.5 (xHigh), 10,033 votes), leaderboard of 27 October 2026.
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