Grok 4 Fast is xAI's latest multimodal model with SOTA cost-efficiency and a 2M token context window. It comes in two flavors: non-reasoning and reasoning.
| Router | Input / 1M | Output / 1M | Cached Input / 1M |
|---|---|---|---|
| Vercel AI | $0.20 | $0.50 | — |
| Martian | $0.20 | $0.50 | — |
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