AI Model Watch
Models / xAI

Grok 4.20 (0309) Reasoning

GA

Reasoning-optimized variant. Aliases include grok-4.20-reasoning-latest, grok-4.20, grok-4.20-reasoning. Modality 'text, image -> text' per official model page. Pricing and cached-input ($0.20/M) confirmed on official model page. Max output tokens, knowledge cutoff and release date not published on docs. Note: docs warn no logprobs support for grok-4.20+.

Provider
xAI
Status
GA
Input price
$1.25 / 1M tokens
Output price
$2.50 / 1M tokens
Cached input
$0.2 / 1M tokens
Blended price
$1.56 / 1M tokens
Context window
1,000,000 tokens (1M)
Max output
—
Modality
text-in, image-in, text-out
Knowledge cutoff
—
Released
—
API string
grok-4.20-0309-reasoning

Source: xAI official documentation ↗

See also

Compare Grok 4.20 (0309) Reasoning with…

Grok 4.20 (0309) Reasoning vs Claude Opus 4.8→

$1.56 vs $10 blended /M

Grok 4.20 (0309) Reasoning vs Claude Opus 4.7→

$1.56 vs $10 blended /M

Grok 4.20 (0309) Reasoning vs Claude Opus 4.6→

$1.56 vs $10 blended /M

Grok 4.20 (0309) Reasoning vs Claude Opus 4.5→

$1.56 vs $10 blended /M