Grok 4 Fast

xaixai/grok-4-fast-non-reasoning

xAI's fast model with 2M token context window. Optimized for speed without reasoning overhead, supporting text and image inputs with function calling and structured outputs.

上下文长度

最大输出

128K

输入价格

$0.360每百万 Tokens

输出价格

$0.900每百万 Tokens

模态能力

文本图像→文本

价格明细

类型	费率
输入	$0.360 每百万 Tokens
输出	$0.900 每百万 Tokens

支持参数

temperaturemax_tokenstop_ptoolstool_choiceresponse_formatstop

API 使用示例

中国大陆用户：将下方示例中的 api.therouter.ai 替换为 api.therouter.com.cn 可获得更低延迟。

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