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Free Grok 4.20 API

Updated 6/5/2026

xAI Grok 4.20 with reasoning, non-reasoning and multi-agent variants — free on Cloudflare and Vercel.

About the Model

Grok 4.20

Grok 4.20 提供多种运行档位，适配不同的延迟与质量需求：

  • reasoning：开启扩展推理，攻坚复杂任务（xai/grok-4.20-0309-reasoning）。
  • non-reasoning：跳过思考链，极速响应（xai/grok-4.20-0309-non-reasoning）。
  • multi-agent：多智能体协同（xai/grok-4.20-multi-agent-0309）。

在 Cloudflare（每日免费额度）与 Vercel（$5/月）均可免费调用。

How to call Grok 4.20

javascript
import { streamText } from 'ai';
const { textStream } = streamText({
  model: 'xai/grok-4.20-reasoning',
  prompt: 'Plan a 3-step refactor.',
});
for await (const chunk of textStream) process.stdout.write(chunk);
curl
curl https://ai-gateway.vercel.sh/v1/chat/completions \
  -H "Authorization: Bearer $AI_GATEWAY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"xai/grok-4.20-reasoning","messages":[{"role":"user","content":"Plan a 3-step refactor."}]}'

Compare Free Providers

The following platforms provide free access to Grok 4.20 through free tiers, trial credits, or daily quotas.

ProviderContext WindowFree QuotaRequires CCTrust / VerifiedAction
Vercel AI GatewayN/AMonthly Credits
$5/mo
No
Trust 98
Details
Cloudflare Workers AIN/ARate Limit
100 requests per day
No
Trust 99
Details

Frequently Asked Questions

Is Grok 4.20 free to use?

Yes. Grok 4.20 is available for free through 2 provider(s) listed below, with no purchase required.

What are the rate limits and quotas?

Free access varies by provider — Vercel AI Gateway: Monthly Credits; Cloudflare Workers AI: Rate Limit.

How do I get a free Grok 4.20 API key?

Sign up with Vercel AI Gateway, then create an API key from your dashboard. See the provider details above for the exact steps.

Which providers offer Grok 4.20 for free?

Grok 4.20 is currently available for free via: Vercel AI Gateway, Cloudflare Workers AI.

Know another free provider for Grok 4.20?

Help the community by sharing other ways to access this model for free.