Updated 6/8/2026
xAI Grok 4.20 (reasoning / non-reasoning / multi-agent). Free on Vercel's $5/mo credit; paid-but-keyless on Cloudflare (Unified Billing).
Grok 4.20 提供多种运行档位，适配不同的延迟与质量需求：
xai/grok-4.20-0309-reasoning）。xai/grok-4.20-0309-non-reasoning）。xai/grok-4.20-multi-agent-0309）。Vercel 每月 $5 免 Key 额度内免费；Cloudflare 免 Key 但付费（统一计费、原价透传）。
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 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."}]}'The following platforms provide free access to Grok 4.20 through free tiers, trial credits, or daily quotas.
Yes. Grok 4.20 is available for free through 2 provider(s) listed below, with no purchase required.
Free access varies by provider — Vercel AI Gateway: Monthly Credits; Cloudflare Workers AI: paid.
Sign up with Vercel AI Gateway, then create an API key from your dashboard. See the provider details above for the exact steps.
Grok 4.20 is currently available for free via: Vercel AI Gateway, Cloudflare Workers AI.
Help the community by sharing other ways to access this model for free.