DeepSeek V3.1 vs LongCat Flash Chat
Both have similar output pricing, while DeepSeek V3.1 offers a larger context window. Choose DeepSeek V3.1 or LongCat Flash Chat based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | DeepSeek V3.1 | LongCat Flash Chat |
|---|---|---|
| Provider | DeepSeek | Vercel AI Gateway |
| Input / 1M tokens | $0.25 | — |
| Output / 1M tokens | $0.95 | — |
| Context window | 164K | 128K |
| Parameters | — | — |
| Open weights | — | No |
| Released | — | Sep 2025 |
| LMArena (Chatbot Arena) Elo score | 1420 | 1423 |
| Epoch Capabilities Index score | 140 | — |
FAQ
Is DeepSeek V3.1 or LongCat Flash Chat cheaper?
DeepSeek V3.1 and LongCat Flash Chat have comparable output pricing.
Which has the larger context window, DeepSeek V3.1 or LongCat Flash Chat?
DeepSeek V3.1 has the larger context window (164K tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.