Grok 4.3

Overview

Model from xAI's Grok family with fast inference, large context and strong performance on real-time reasoning tasks. Grok 4.3 supports up to 1M tokens of context, native vision input. Served through the FirmLink unified API with OpenAI-compatible endpoints.

API example

Fully OpenAI-compatible — just change the model field.

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

Pricing

More from xAI