Grok 4.3

model: 'grok-4-3'

Available through xai, vertex, and openrouter.

Configuration

// xAI
{
  provider: 'xai',
  model: 'grok-4-3',
  extra: { apiKey: process.env.XAI_API_KEY },
}

// Vertex AI
{
  provider: 'vertex',
  model: 'grok-4-3',
  extra: { project: 'my-gcp-project', location: 'us-central1' },
}

See xAI, Google Vertex AI, or OpenRouter for authentication.

Specifications

Max input tokens	1,000,000
Max output tokens	131,000
Temperature	Not sent — sampling parameters are unsupported on this model

Cost

	Cost
Input tokens	$1.25 / million
Output tokens	$2.50 / million

Costs are estimates. Actual billing depends on the provider and region.

JSON output

JSON enrichers use the OpenAI-compatible response_format: json_schema (strict: true). See JSON output and schemas.

Timeout

timeoutMs applies per individual LLM call within a batch. If unset, no explicit timeout is applied beyond the provider's default.

Related

• xAI
• LLM models overview