Claude Sonnet 5
by Anthropic · ID claude-sonnet-5 · Released 2026-06 · Proprietary
1462
ELO Score
-
MMLU
-
HumanEval
1M
Context Window
$2.00
Input Price
About Claude Sonnet 5
Anthropic's most agentic Sonnet yet (June 30, 2026), approaching Opus 4.8 quality at a fraction of the cost. Best for agentic coding, multi-file refactors, long-document analysis and computer use. Launched at $2/$10 as introductory pricing; on 10 August 2026 Anthropic made that the permanent price and cancelled the planned rise to $3/$15. Prices checked 21 September 2026. Arena text score 1462 (Claude Sonnet 5 (High), 52,952 votes), leaderboard of 27 October 2026.
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