DeepSeek V4.1 Flash vs LongCat Flash Chat
Both have similar output pricing, while DeepSeek V4.1 Flash offers a larger context window. Choose DeepSeek V4.1 Flash or LongCat Flash Chat based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | DeepSeek V4.1 Flash | LongCat Flash Chat |
|---|---|---|
| Provider | DeepSeek | Vercel AI Gateway |
| Input / 1M tokens | $0.14 | — |
| Output / 1M tokens | $0.42 | — |
| Context window | 1M | 128K |
| Parameters | — | — |
| Open weights | — | No |
| Released | — | Sep 2025 |
| Epoch Capabilities Index score | 156 | — |
| LMArena (Chatbot Arena) Elo score | 1464 | 1423 |
| GPQA Diamond score | 93.2 | — |
| LMArena WebDev Elo score | 1664 | — |
| LMArena Vision Elo score | 1278 | — |
FAQ
Is DeepSeek V4.1 Flash or LongCat Flash Chat cheaper?
DeepSeek V4.1 Flash and LongCat Flash Chat have comparable output pricing.
Which has the larger context window, DeepSeek V4.1 Flash or LongCat Flash Chat?
DeepSeek V4.1 Flash has the larger context window (1M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.