xAI · MultimodalReleased 2026-03-09

grok-4.20

xai/grok-4.20-non-reasoning id

Grok 4.20 Beta is the newest flagship model from xAI with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherence, delivering consistently precise and truthful responses.

Tool useChatWeb searchFastLong context

Type

Use grok-4.20

# Drop-in OpenAI-compatible client
$ import { generateText } from 'ai'
$ 
$ const { text } = await generateText({
$   model: 'xai/grok-4.20-non-reasoning',
$   baseURL: 'https://synapse.garden/api/v1',
$   apiKey: process.env.MG_KEY,
$   prompt: 'Why is the sky blue?',
$ })

CONTEXT WINDOW

MAX OUTPUT

$1.38/M

INPUT · PER M

$2.75/M

OUTPUT · PER M

PRICING

List prices, every modality.

Rate	Per million tokens · USD
Input	$1.38/M
Output	$2.75/M
Cache read	$0.220/M

Honest list pricesHow we calculate prices

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Model

Input

Output

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FAQ · GROK-4.20

Frequently asked

01 / 04

How do I call grok-4.20 from my code?

Use the OpenAI or Anthropic SDK and point baseURL at https://synapse.garden/api/v1. Set model: ‘xai/grok-4.20-non-reasoning’ and supply your Synapse Garden API key. No code changes beyond the base URL.

02 / 04

How much does grok-4.20 cost?

Input: $1.38/M per million tokens. Output: $2.75/M per million tokens. The free tier includes a million tokens every month at no cost.

03 / 04

What's the context window for grok-4.20?

grok-4.20 supports a context window of 2M tokens, with a maximum output of 2M tokens.

04 / 04

Do I need a separate Anthropic or OpenAI account?

No. Synapse Garden is the single API surface — one key gives you OpenAI, Anthropic, Google, Meta, Mistral, DeepSeek, xAI, Cohere, and more. Billing, rate limits, and audit logs are unified.

READY

Try grok-4.20 in three minutes.

Sign up, create a key, drop our base URL into your existing client. The free tier includes a million tokens every month — no credit card.

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