DeepSeek V4 Flash vs Grok 4.1 Fast
A direct API-pricing comparison between DeepSeek V4 Flash and Grok 4.1 Fast. Below: every cost dimension side by side, then the bottom line for a typical workload.
Bottom line
For a typical 5K-in / 1K-out request, DeepSeek V4 Flash is the cheaper choice at $0.0010 per call — 1.5× less than Grok 4.1 Fast at $0.0015.
| DeepSeek V4 FlashDeepSeek | Grok 4.1 FastxAI | |
|---|---|---|
| Input / 1M tokens | $0.140 | $0.200 |
| Output / 1M tokens | $0.280 | $0.500 |
| Cached input / 1M | $0.014 | — |
| Context window | 128K | 256K |
| Provider | DeepSeek | xAI |
Green = cheaper on that line. Prices are estimates from public pricing pages; verify against DeepSeek and xAI before relying on them.
Which is cheaper, DeepSeek V4 Flash or Grok 4.1 Fast?
On output tokens — usually the dominant cost — DeepSeek V4 Flash charges $0.280 per million versus $0.500 for Grok 4.1 Fast. The right pick depends on your input/output ratio and how much you can serve from cache. Use the calculator to model your exact traffic.