Claude Opus 4
by Anthropic · ID claude-opus-4 · Released 2025-05 · Proprietary
1426
ELO Score
-
MMLU
-
HumanEval
200K
Context Window
$5.00
Input Price
About Claude Opus 4
Anthropic's first Opus 4 generation model with extended thinking capabilities and strong agentic coding performance. Arena text score 1426 (Claude Opus 4 (Thinking 16K, 20250514), 35,904 votes), leaderboard of 27 October 2026.
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