xAIactive

Grok 4.20

grok-4.20

xAI's flagship model optimized for truth-seeking and reasoning.

Context Window

131.1K

tokens

Max Output

16.4K

tokens

Input Price

$2.00

per 1M tokens

Output Price

$6.00

per 1M tokens

Details

Familygrok-4

Training Cutoff2025-12-01

ReleasedMarch 4, 2026

Aliasesgrok-4.20-experimental-beta-0304-non-reasoning, grok-4.20-experimental-beta-0304-reasoning

VisionFunctionsStreamingJSON ModeCodeReasoningTool UseMultimodal

https://api.x.ai/v1/chat/completions

HumanEvalFunction-level Python code generation

92%

MATH-500Competition-style math

90%

MMLU-ProHarder successor to MMLU

82.5%

GPQA DiamondPhD-level science questions

70.5%

SWE-bench VerifiedResolving real GitHub issues

50.8%

curl pikaainews.com/api/models/xai-grok-4-20

npx pika-models info xai-grok-4-20

Official

xAI Console

Official Grok API from xAI.

Grok 4.1 Fast

grok-4-1-fast