A side-by-side comparison of Claude Opus 5 and DeepSeek-V4.1-Flash: input/output pricing, capabilities and available endpoints, served live from 24小时不打烊的AI超级便利店. Both are reachable with the same API key.
| Item | Claude Opus 5 | DeepSeek-V4.1-Flash |
|---|---|---|
| Input (per 1M tokens) | $4.5 | $0.165 |
| Output (per 1M tokens) | $22.5 | $0.66 |
| Cache read explicit (per 1M tokens) | $0.45 | $0.0165 |
| Cache write 5m (per 1M tokens) | $5.625 | — |
| Item | Claude Opus 5 | DeepSeek-V4.1-Flash |
|---|---|---|
| Context window | 1,000,000 | 1,000,000 |
| Max output | 128,000 | 393,216 |
| Item | Claude Opus 5 | DeepSeek-V4.1-Flash |
|---|---|---|
| function_calling | Yes | — |
| prompt_caching | Yes | Yes |
| reasoning | — | Yes |
| thinking | — | Yes |
| vision | Yes | — |
On input, DeepSeek-V4.1-Flash is cheaper ($4.5 vs $0.165 per 1M tokens). On output, DeepSeek-V4.1-Flash is cheaper ($22.5 vs $0.66 per 1M tokens). All prices are per million tokens in USD.
both support prompt_caching; only Claude Opus 5 supports function_calling, vision; only DeepSeek-V4.1-Flash supports reasoning, thinking.
Yes. Both are available on 24小时不打烊的AI超级便利店 through one API key and the same OpenAI-compatible endpoint — switching means changing the model field from "claude-opus-5" to "deepseek-v4.1-flash", nothing else.
Both are available on 24小时不打烊的AI超级便利店 under one API key — switching between them means changing the model field and nothing else, so you can use each where it fits rather than picking one.