According to UsagePricing's tracker, Grok 4 Fast costs $0.20 per 1M input tokens and $0.50 per 1M output tokens as of March 2026. The model supports a 2,000,000-token context window.
Near-frontier capability at exceptional value — 2M context window.
Token Costs (per 1M)
Input Price
$0.20
Output Price
$0.50
Technical Specs
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How much does Grok 4 Fast cost per 1M tokens? ▼
Grok 4 Fast costs $0.2 per 1M input tokens and $0.5 per 1M output tokens as of March 2026.
What is Grok 4 Fast's context window? ▼
Grok 4 Fast has a context window of 2,000,000 tokens, meaning it can process approximately 1,500,000 words in a single request.
Who makes Grok 4 Fast? ▼
Grok 4 Fast is made by xAI. You can access it via the xAI API.