Grok 4.3

grok-4.3

Cheaper. More stable. One-stop API aggregation.

Introduction

Grok 4.3 (xAI) is exposed as an API-only text model at official list rates.

Use model id `grok-4.3` with standard chat completions.

It is whitelisted for keys but not shown on the primary marketing cards.

Pricing

Official$1.25 / $2.50 per 1M (in/out)

LumeAPI$1.25 / $2.50 per 1M (in/out)

per 1M tokens (in/out)

Endpoint

Base URL: https://api.lumeapi.site/v1

Auth: Authorization: Bearer <your-lumeapi-key>

Developer docs

Open the integration notes for this model, or the modality guide for request fields and polling.

Model docs All model docs Agent docs (llms.txt)

curl https://api.lumeapi.site/v1/chat/completions \
  -H "Authorization: Bearer $LUMEAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "grok-4.3",
    "messages": [{"role":"user","content":"Hello"}]
  }'

Create API key