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Grok 4.3

xaixai/grok-4.3

xAI's most advanced flagship model — industry-leading non-hallucination rate, agentic tool calling, and instruction following. 1M token context, text + image input, configurable reasoning (none/low/medium/high), function calling, structured outputs.

Context Length
1M
Max Output
66K
Input Priceper 1M tokens
$1.87/ 1M tokens
Output Priceper 1M tokens
$3.76/ 1M tokens

Modalities

textimage→text

Pricing Breakdown

TypeRate
Input$1.87 / 1M tokens
Output$3.76 / 1M tokens

Selling price = 1.25x upstream cost ($1.25/$2.50/$0.20 cached per xAI public pricing 2026-05-19)

Supported Parameters

temperaturemax_tokenstop_ptoolstool_choiceresponse_formatreasoningstop

API Usage Examples

Use the global api.therouter.ai endpoint shown below for new integrations; the legacy China accelerated endpoint is retired.

cURL
curl https://api.therouter.ai/v1/chat/completions   -H "Content-Type: application/json"   -H "Authorization: Bearer $THE_ROUTER_API_KEY"   -d '{
    "model": "xai/grok-4.3",
    "messages": [
      {"role": "user", "content": "Summarize the key points from this input."}
    ]
  }'
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