Grok 4.20
active
xAI2026-03-09
Specifications
Modalities
text
Context Window1000K tokens
Max Output-
Training Cutoff-
Open SourceNo
Pricing (per 1M tokens)
Input$1.2500
Output$2.5000
Cache Read$0.2000
Benchmarks
Arena score (text)1472
Arena ratings: LMArena leaderboard dataset, CC BY 4.0, snapshot 2026-10-28.
MMLU-Pro-
SWE-Bench-
GPQA Diamond-
HumanEval-
ARC-AGI-
MATH-
API
Model ID
grok-4.20-0309Sources
- xAI: Models | xAI Docs
price input · as of 2026-07-04
- LMArena: Arena leaderboard dataset, text_style_control overall: Grok 4.20 Beta (Reasoning, 0309)
elo rating · as of 2026-10-28