Chat completions

POST /v1/chat/completions

Example

curl https://sub2api.lingshichat.top/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "grok-4.5",
    "messages": [
      {"role": "system", "content": "You are a helpful assistant"},
      {"role": "user", "content": "Hello"}
    ],
    "temperature": 0.7,
    "stream": false
  }'

Common parameters

Param	Type	Required	Notes
`model`	string	yes	Prefer `grok-4.5`
`messages`	array	yes	Chat messages
`temperature`	number	no	Sampling temperature
`max_tokens`	integer	no	Max output tokens
`stream`	boolean	no	SSE streaming

Streaming

{
  "model": "grok-4.5",
  "stream": true,
  "messages": [{"role": "user", "content": "Hello"}]
}

For Grok Build, prefer the Responses path (api_backend = "responses").