Using Grok 4.20 Reasoning on xAI Console

Implementation guide · Grok 4 · xAI

Serverless

xAI Console exposes Grok 4.20 Reasoning through model ID grok-4.20-0309-reasoning. Use the setup steps, sourced pricing, capabilities, and official provider links below to validate this route before deployment.

Last refreshed 2026-07-10. Next refresh: weekly.

Quick Start

  1. 1
    Create an account at xAI Console and generate an API key.
  2. 2
    Use the xAI Console SDK or REST API to call grok-4.20-0309-reasoning — see the documentation for request format.
  3. 3
    You'll be billed $1.25/1M input, $2.50/1M output tokens. See full pricing.
API PortalDocumentationPricingModel Card

Code Examples

See xAI Console documentation for integration details.

Pricing on xAI Console

TypePrice (per 1M)
Input tokens$1.25
Output tokens$2.50

Capabilities

VisionMultimodalReasoningJSON / Tool useStructured Outputs

About Grok 4.20 Reasoning

Grok 4.20 Reasoning is the xAI API reasoning variant launched around March 10, 2026 as grok-4.20-0309-reasoning. The prior May 2026 seed date was a placeholder; this model was already available months earlier and remains active.

Full model details →

Model Specs

Released2026-03-10
Context1m
Knowledge cutoff2024-11

More Models on xAI Console

Grok 4Grok 4.20Grok 4.3Grok 4.20 Multi-AgentGrok 4.1 FastGrok 4 Fast Reasoning
All models on xAI Console →

Also available on(1)

Vercel AI Gateway$1.25/1M
Compare all providers →

Provider

xAI Console

xAI

Burlingame, California, United States