xAI API

x.ai

Provides access to xAI's Grok models for text, code, voice, image, and video generation through an OpenAI-compatible REST API.

The xAI API API uses Bearer token authentication; has usage based pricing; rate limits: Automatically increasing rate limits; custom rate limits available via sales. Verified 2026-07-26 with per-field source links.

AI & Machine Learning Verified 2026-07-26 medium confidence

Base URL

https://api.x.ai/v1

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Auth

Bearer token

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Free tier

not documented null

no source

Pricing model

usage based

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Pricing

Grok 4.5: $2.00/1M input tokens, $6.00/1M output tokens; Voice: Agent $3.00/hour, TTS $15.00/1M chars, STT $0.10-0.20/hour; Imagine: $0.02/image, $0.05/sec video

x.ai ↗

Rate limits

Automatically increasing rate limits; custom rate limits available via sales

x.ai ↗

OpenAPI spec

not documented null

no source

MCP server

not documented null

no source