SpaceXAI: Grok 4.3

x-ai/grok-4.3 — available through the Autonomous Relay Agents API, served by xAI.

SpaceXAI: Grok 4.3 has a 1,000,000-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: 1,000,000 tokens
Input: $1.25 per M
Output: $2.50 per M
Served by: xai
Input modalities: text, image, file

Variants

The same model under another model id, priced or limited differently. Call it by its id; prices are per million tokens.

Variant	Model id	Context	Input	Output
SpaceXAI: Grok 4.3 (batch)	x-ai/grok-4.3:batch	1,000,000	$1.00 per M	$2.00 per M

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-4.3", "messages": [{"role": "user", "content": "Hello"}]}'

Compare

In collections

Documents