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Grok 4.20 (Reasoning) API Pricing

Verified against xAI’s pricing page on 2026-07-02.

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Facts

Specs

  • FamilyGrok
  • API IDgrok-4.20-0309-reasoning
  • ModalityText
  • Context window1M tokens
  • Max output—
  • Release dateNot published

Pricing (per 1M tokens)

  • Input$1.25 / 1M tokens
  • Output$2.50 / 1M tokens
  • Cached input$0.20 / 1M tokens
  • Cache write—
  • Batch discount—

Capabilities

reasoning

Worked cost examples

Estimated monthly cost on three common usage shapes

WorkloadEst. monthly cost

Chatbot

800 input / 200 output tokens per request, 100,000 requests/month

$150.00

RAG pipeline

6,000 input / 700 output tokens per request, 30,000 requests/month

$277.50

Batch summarization

20,000 input / 1,500 output tokens per request, 5,000 requests/month

$143.75

Price history

Changes we have documented since we began tracking

No price changes recorded since we began tracking.

Grok 4.20 (Reasoning) pricing FAQ

How much does Grok 4.20 (Reasoning) cost per 1M tokens?
Grok 4.20 (Reasoning) costs $1.25 per 1M input tokens and $2.50 per 1M output tokens.
How much does Grok 4.20 (Reasoning) cost per request?
A typical request of 800 input and 200 output tokens costs about $0.0015 on Grok 4.20 (Reasoning).
Is Grok 4.20 (Reasoning) cheaper than Grok 4.20 (Multi-Agent)?
Grok 4.20 (Reasoning) and Grok 4.20 (Multi-Agent) charge the same per input token.
Does Grok 4.20 (Reasoning) have cache pricing?
Yes — cached input reads cost $0.20 per 1M tokens.

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