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Grok 4.5 vs Grok 4.3

List rates and scores as of 2026-09-20. Lower $/MTok is cheaper. Higher scores rank better. Input edge: Grok 4.3 Output edge: Grok 4.3

Model A

Grok 4.5

xAI

xai/grok-4-5

reasoningtools

List input$2
List output$6
Context1M
Offers31
Arena code1555
AA intelligence38.8
AA coding72.4
AA agentic41.2

On plans: Cursor Business, Cursor Pro, Cursor Start, Cursor Ultra

Model B

Grok 4.3

xAI

xai/grok-4-3

reasoningtools

List input$1
List output$2
Context1M
Offers38
Arena codeN/A
AA intelligence24.9
AA coding42.2
AA agentic15.5

On plans: SuperGrok Heavy, SuperGrok Plus

Score sources on /benchmarks.