Anthropic
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Listed August 2025
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Multimodal Foundation
Claude Opus 4.1
Arena #79 • score 1450 ±3
Proprietary model from Anthropic, listed August 2025. Arena text score 1450 (#79 of 414 entries). $15.00 input / $75.00 output per 1M tokens. 200K tokens context.
Parameters
Not disclosed
Context Window
200K tokens
Input / 1M tokens
$15.00
Output / 1M tokens
$75.00
Benchmark Results
- Arena Text Elo: 1450 (#79 of 414 on arena.ai · ±3 · 49,555 votes · variant: claude-opus-4-1-20250805-thinking-16k)
- AA Intelligence Index: 22.8 (Artificial Analysis v4.3 · best setting: Claude 4.1 Opus (Reasoning) · checked 2026-10-11)