xAI
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Listed March 2026
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Multimodal Foundation
Grok 4.20
Arena #37 • score 1475 ±5
Proprietary model from xAI, listed March 2026. Arena text score 1475 (#37 of 414 entries). $1.25 input / $2.50 output per 1M tokens. 2M tokens context.
Parameters
Not disclosed
Context Window
2M tokens
Input / 1M tokens
$1.25
Output / 1M tokens
$2.50
Benchmark Results
- Arena Text Elo: 1475 (#37 of 414 on arena.ai · ±5 · 27,928 votes · variant: grok-4.20-beta1)
- AA Intelligence Index: 25.7 (Artificial Analysis v4.3 · best setting: Grok 4.20 0309 v2 (Reasoning) · checked 2026-10-11)