Grok 4

xaixai/grok-4

xAI's most powerful reasoning model with 256K token context window. Excels at complex reasoning, coding, and multi-step problem solving with function calling and structured outputs.

Context Length

256K

Max Output

66K

Input Price

$5.40/ 1M tokens

Output Price

$27.00/ 1M tokens

Modalities

textimage→text

Pricing Breakdown

Type	Rate
Input	$5.40 / 1M tokens
Output	$27.00 / 1M tokens

Supported Parameters

temperaturemax_tokenstop_ptoolstool_choiceresponse_formatreasoningstop

API Usage Examples

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",
    "messages": [
      {"role": "user", "content": "Summarize the key points from this input."}
    ]
  }'