Open-source AI infrastructure

Grok 4 Fast

Review Grok 4 Fast on xAI: token pricing, context window, capabilities, modalities, and routing details in the Everstack model catalog.

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Grok 4 Fast pricing and limits on xAI

Token pricing through xAI: $0.200 per million input tokens, $0.500 per million output tokens. Limits: 2000K token context window, 30K max output tokens.

Capabilities and modalities

Supported capabilities: chat, function_calling, vision, reasoning. Accepts text, image input. Returns text output. Model family: grok. Catalog status: stable.

Routing Grok 4 Fast through Everstack

Call Grok 4 Fast on xAI through one OpenAI-compatible endpoint, with provider fallback, semantic caching, per-tenant rate limits, and OpenTelemetry traces for latency, tokens, and cost.