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-4-20250514-thinking-16k, 35,735 votes), leaderboard of 13 September 2026.
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