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Matthew Berman asks DeepSeek for a 1,000-word essay and estimates that it generates at roughly 200 tokens per second. He then highlights the displayed DeepSeek-V4.1-Flash API pricing and calls the model a fast, inexpensive workhorse. The speed and response length are his estimates from one demonstration, not a measured benchmark. The input prices he quotes apply to cache misses; prices and available models can change.
- 1Essay demonstrationBerman requests a 1,000-word essay and estimates its speed at roughly 200 tokens per second.
- 2Input pricesThe September 2026 slide lists $0.15 off-peak and $0.30 peak per million cache-miss input tokens.
- 3Output pricesThe slide lists $0.60 off-peak and $1.20 peak per million output tokens.
Conclusiones
- Berman estimates about 200 tokens per second and six seconds for his requested essay, without providing a measured token count.
- The displayed V4.1 Flash off-peak rate was $0.15 per million cache-miss input tokens and $0.60 per million output tokens.
- The displayed peak rates were $0.30 per million cache-miss input tokens and $1.20 per million output tokens.
- Speed and cost vary with the workload, serving conditions and pricing schedule.
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Speed test and API pricing
Berman demonstrates an essay request and estimates generation speed. He then reviews V4.1 Flash peak and off-peak prices and gives his impression of the model.
I ask DeepSeek for a 1,000-word essay about DeepSeek and am impressed by how quickly the response appears. I estimate around 200 tokens per second and approximately six seconds for the response. This is a visual estimate from one run: the video does not establish the actual output token count, completed word count or a repeatable throughput measurement.
The on-screen DeepSeek-V4.1-Flash API slide lists a September 2026 rate of $0.15 per million input tokens off-peak and $0.30 during peak hours for cache misses. It also shows lower cache-hit rates of $0.003 and $0.006 respectively. These are historical API rates, not a guarantee of current prices.
For output, the slide lists $0.60 per million tokens off-peak and $1.20 at peak. I consider it a fast, efficient and inexpensive workhorse, though actual speed, cost and suitability depend on the task and service conditions.
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