Anthropic
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Listed September 2026
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Multimodal Foundation
Claude Sonnet 5.5
Arena #32 • score 1476 ±9
Proprietary model from Anthropic, listed September 2026. Arena text score 1476 (#32 of 414 entries). $2.00 input / $10.00 output per 1M tokens. 1M tokens context.
Parameters
Not disclosed
Context Window
1M tokens
Input / 1M tokens
$2.00
Output / 1M tokens
$10.00
Benchmark Results
- Arena Text Elo: 1476 (#32 of 414 on arena.ai · ±9 · 4,838 votes · variant: claude-sonnet-5.5-xhigh)
- AA Intelligence Index: 56 (Artificial Analysis v4.3 · best setting: Claude Sonnet 5.5 (Max, Default Fallback) · checked 2026-10-11)