Anthropic
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Listed November 2025
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Multimodal Foundation
Claude Opus 4.5
Arena #41 • score 1474 ±4
Proprietary model from Anthropic, listed November 2025. Arena text score 1474 (#41 of 414 entries). $5.00 input / $25.00 output per 1M tokens. 200K tokens context.
Parameters
Not disclosed
Context Window
200K tokens
Input / 1M tokens
$5.00
Output / 1M tokens
$25.00
Benchmark Results
- Arena Text Elo: 1474 (#41 of 414 on arena.ai · ±4 · 37,527 votes · variant: claude-opus-4-5-20251101-high-32k)
- SWE-bench Verified: 76.8% (mini-SWE-agent (bash only) · run 'Claude 4.5 Opus (high)' · 2026-02-17)
- AA Intelligence Index: 29.1 (Artificial Analysis v4.3 · best setting: Claude Opus 4.5 (Reasoning) · checked 2026-10-11)