SpaceXAI: Grok 4.20

x-ai/grok-4.20 — available through the Autonomous Relay Agents API, served by xAI.

SpaceXAI: Grok 4.20 has a 2,000,000-token context window and costs $1.25 per million input tokens and $2.50 per million output tokens, at the provider's list price on your own key.

Context length
2,000,000 tokens
Input
$1.25 per M
Output
$2.50 per M
Served by
xai
Input modalities
text, image, file

This is a BYOK-only model: requests use your own provider key. Prices shown are the provider's list prices.

Call it

Any OpenAI-compatible client works: change the base URL and send this model id.

curl https://autonomousrelay.com/v1/chat/completions \
  -H "Authorization: Bearer $AUTONOMOUS_RELAY_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "x-ai/grok-4.20", "messages": [{"role": "user", "content": "Hello"}]}'

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