Compare

Grok 4 vs Grok 4.20 (Reasoning)

List rates and scores as of 2026-08-04. Cheaper is lower $/MTok. Higher scores win. Input edge: Grok 4.20 (Reasoning) Output edge: Grok 4.20 (Reasoning)

Model A

Grok 4

xai/grok-4

reasoningtools

List input$3
List output$15
Context256K
Offers14

On plans: Grok Premium (X Premium), Grok Premium+ (X Premium+), SuperGrok

Model B

Grok 4.20 (Reasoning)

xai/grok-4.20-reasoning

reasoningtools

List input$1.25
List output$2.50
Context2M
Offers6

On plans: SuperGrok, SuperGrok Plus