price tracker · updated 2026-07-20
Cheapest Grok 4 Fast API
llm · per 1M output tokens
xAI's cost-efficient Grok 4 Fast (2M-token context) is $0.50 per 1M output tokens on xAI's own API and via OpenRouter, far below the full Grok 4's $15.
Grok 4 Fast
llm · per 1M output tokens
Cheapest verified endpoint: xAI at $0.50 (llm · per 1M output tokens). Prices normalized per unit, ex. egress.
How we track this
We re-pull every known provider that serves Grok 4 Fast weekly, normalize to a single unit (llm · per 1M output tokens), and pin the price the moment a provider posts it — we don't average across stale snapshots. Switching providers is usually a one-line base-URL change. Spot a stale price? tell us.
Frequently asked questions
What is the cheapest Grok 4 Fast API?
xAI currently has the lowest price for Grok 4 Fast at $0.50 (llm · per 1M output tokens), based on our 2026-07-20 check across 2 providers.
How much does the Grok 4 Fast API cost?
Prices for Grok 4 Fast range from $0.50 at xAI up to $0.50 at xAI, measured as llm · per 1M output tokens. Same model, different bill: picking the right provider saves up to 0%.
Which providers offer Grok 4 Fast?
We currently track 2 endpoints for Grok 4 Fast: xAI, openrouter. The table above ranks them by effective price, cheapest first.
How often are these prices updated?
We re-check every provider weekly and pin the exact posted price rather than averaging stale snapshots. This table was last refreshed on 2026-07-20.
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