DeepSeek-V4.1-Flash vs DeepSeek V4 Pro: which should you use?
Prices, limits and measured figures for both models on Wokey, side by side. The data comes first, then when it points to DeepSeek-V4.1-Flash and when to DeepSeek V4 Pro.
Side by side
| Metric | DeepSeek-V4.1-Flash | DeepSeek V4 Pro |
|---|---|---|
| Wokey input price (per 1M tokens) | $0.15 | $0.66 |
| Wokey output price (per 1M tokens) | $0.6 | $1.98 |
| Wokey cache read price | $0.003 | $0.022 |
| Official price (input / output) | $0.3 / $1.2 | $1.32 / $3.96 |
| Context window | 1M | 1M |
| Max output | 393.2K | 384K |
| Image input | Yes | No |
| API forms | /v1/chat/completions · /v1/responses · /v1/messages | /v1/chat/completions |
| Time to first token, short prompts (median / p90) | 2.1 s / 4.8 s | 2.1 s / 3.9 s |
| Time to first token, large agent inputs (median) | 3.6 s | 3.3 s |
| Cache hit rate | 94.2% | 94.7% |
| Accounts in the sample | 200+ | 90+ |
When to use DeepSeek-V4.1-Flash
- Budget matters or volume is high: DeepSeek-V4.1-Flash costs $0.15 input and $0.6 output per million tokens, against $0.66 and $1.98 for DeepSeek V4 Pro — a 3.3× gap on output.
- Single responses are long: DeepSeek-V4.1-Flash returns up to 393.2K tokens, DeepSeek V4 Pro up to 384K.
- Requests include images: DeepSeek-V4.1-Flash accepts image input, DeepSeek V4 Pro is text only.
- Your client speaks /v1/responses, /v1/messages: DeepSeek-V4.1-Flash is served on it, DeepSeek V4 Pro is not.
When to use DeepSeek V4 Pro
- You want the first token sooner: on short prompts the median time to first token is 2.1 s for DeepSeek V4 Pro and 2.1 s for DeepSeek-V4.1-Flash.
- You run agent tasks with long context: on large inputs the median time to first token is 3.3 s for DeepSeek V4 Pro and 3.6 s for DeepSeek-V4.1-Flash.
Where the data comes from
- Prices, context window, max output and API forms come from the Wokey model catalog, the same data billing uses.
- DeepSeek-V4.1-Flash and DeepSeek V4 Pro are priced by time of day: the vendor halves every meter outside its peak hours and Wokey follows. This page shows the tier in effect when it was generated, official and Wokey prices from the same tier; in the other tier the amounts differ by half.
- Time to first token and cache hit rate come from real requests through Wokey over a 28-day window; models without enough samples show no figure.
- Cache hit rate and time to first token depend on the client, prompt length and usage pattern. The two models have different users, so this is not a controlled test on the same requests.
FAQ
Which is cheaper, DeepSeek-V4.1-Flash or DeepSeek V4 Pro?
DeepSeek-V4.1-Flash. On Wokey it costs $0.15 input and $0.6 output per million tokens; DeepSeek V4 Pro costs $0.66 and $1.98.
Which responds faster, DeepSeek-V4.1-Flash or DeepSeek V4 Pro?
On real requests through Wokey, the median time to first token on short prompts is 2.1 s for DeepSeek V4 Pro and 2.1 s for DeepSeek-V4.1-Flash. This is time to first token, not the speed of the full response.
Can I switch between DeepSeek-V4.1-Flash and DeepSeek V4 Pro?
Yes. Both use the same Wokey API key and base URL: change the model ID in the request between deepseek-v4.1-flash and deepseek-v4-pro, and each is billed at its own price.
Why is there no quality score here?
Wokey runs no benchmarks and gives no scores. This page holds only data we have ourselves: catalog prices and limits, and time to first token and cache hit rate measured on real requests. For quality, run your own task on both models.