Anthropic
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Listed May 2026
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Multimodal Foundation
Claude Opus 4.8
Arena #25 • score 1481 ±4
Proprietary model from Anthropic, listed May 2026. Arena text score 1481 (#25 of 414 entries). $5.00 input / $25.00 output per 1M tokens. 1M tokens context.
Parameters
Not disclosed
Context Window
1M tokens
Input / 1M tokens
$5.00
Output / 1M tokens
$25.00
Benchmark Results
- Arena Text Elo: 1481 (#25 of 414 on arena.ai · ±4 · 64,177 votes · variant: claude-opus-4-8-high)
- AA Intelligence Index: 41.8 (Artificial Analysis v4.3 · best setting: Claude Opus 4.8 (Max) · checked 2026-10-11)
- AA Coding Index: 74.3 (Artificial Analysis v4.3 · best setting: Claude Opus 4.8 (Max) · checked 2026-10-11)
- AA Agentic Index: 41.9 (Artificial Analysis v4.3 · best setting: Claude Opus 4.8 (Max) · checked 2026-10-11)