Grok 4.3 API: Pricing and Specs

Grok 4.3 API

Grok 4.3 is a large language model by xAI, available on the Venice API as grok-4-3. It runs privately, with zero data retention.Grok 4.3 is a reasoning model from xAI with function calling, structured outputs, and a 1M-token context window. Suited for agentic workflows, instruction-following tasks, and applications requiring high factual accuracy.

Grok 4.3 API pricing

Model ID	Variant	Privacy	Price
`grok-4-3`	Standard	Private	$1.42 / $2.83 per 1M

Grok 4.3 specifications

Spec	Value
Provider	xAI
Released	Apr 18, 2026
Privacy	Private
Status	Stable
Context window	1M tokens
Max output	32K tokens
Reasoning effort	none, low, medium, high

How to use the Grok 4.3 API

Send requests to POST https://api.venice.ai/api/v1/chat/completions with "model": "grok-4-3" and your API key.

curl https://api.venice.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $VENICE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "grok-4-3",
    "messages": [{ "role": "user", "content": "Explain TEE attestation in two sentences." }],
    "reasoning_effort": "low"
  }'

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Grok 4.3 API

Grok 4.3 API pricing

Grok 4.3 specifications

How to use the Grok 4.3 API

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