xAI modelsChat Completions model

x-ai/grok-3

Grok 3 is the latest model from xAI. It's their flagship model that excels at enterprise use cases like data extraction, coding, and text summarization. Possesses deep domain knowledge in finance, healthcare, law, and sc...

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131.1K max output

Input $3.00/M · Output $15.00/M · Cache read $0.75/M

OutputReady

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API details and access

Model Details

ProviderxAI

TypeLlm

Model IDx-ai/grok-3

Capabilities

InputText

OutputText

Context-

Max Output131,072

VisionNot supported

Function CallingSupported

Access details

Chat Completions

Base URLhttps://api.sandbase.ai

API Endpoint/v1/chat/completions

{
  "model": "x-ai/grok-3",
  "messages": [
    {
      "role": "user",
      "content": "Hello"
    }
  ],
  "max_tokens": 512
}

Pricing

Input$3.00 / 1M tokens

Output$15.00 / 1M tokens

Cache read$0.75 / 1M tokens

Production endpoint

Send your first request

OpenAI-compatible endpoint with unified authentication and usage tracking.

POSThttps://api.sandbase.ai/v1/chat/completions

Model IDx-ai/grok-3

Input Schema

12 parameters · 1 required · 11 optional

Parameter	Type	Required	Description
`messages`	object[]	Required	—
`seed`	integer	Optional	—
`stop`	string[]	Optional	—
`tools`	array	Optional	—
`top_p`	number	Optional	Min: 0 · Max: 1
`stream`	boolean	Optional	Default: false
`max_tokens`	integer	Optional	Max: 131072
`temperature`	number	Optional	Min: 0 · Max: 2 · Default: 1
`tool_choice`	string	Optional	—
`response_format`	object	Optional	—
`presence_penalty`	number	Optional	Min: -2 · Max: 2
`frequency_penalty`	number	Optional	Min: -2 · Max: 2

Output Schema

Field	Type	Description
`id`	string	Unique identifier for the completion
`object`	string	Object type, e.g. "chat.completion"
`model`	string	Model used for the completion
`choices`	array	List of completion choices
`choices[].message.content`	string	Generated text content
`choices[].finish_reason`	string	Reason the generation stopped
`usage.prompt_tokens`	integer	Number of tokens in the prompt
`usage.completion_tokens`	integer	Number of tokens in the completion
`usage.total_tokens`	integer	Total tokens used

Code Examples

Ready-to-run snippets

curl https://api.sandbase.ai/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "x-ai/grok-3",
    "messages": [{"role": "user", "content": "Hello"}],
    "temperature": 0.7,
    "max_tokens": 2048,
    "stream": true
  }'

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