DeepSeek: DeepSeek V4.1 Flash API Pricing
DeepSeek: DeepSeek V4.1 Flash costs $0.049 per 1M input tokens and $0.375 per 1M output tokens (cache reads: $0.0010). Context window: 1.0M. Prices verified 2026-10-21 · source
Alternatives to consider
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Token economics
| Token type | Price | vs base input |
|---|---|---|
| Standard input | $0.049 | — |
| Cache read | $0.0010 | −98% |
| Output | $0.375 | — |
Prompt caching stores repeated context server-side: reads cost far less, but writes carry a one-time premium.
Higher effort = deeper thinking = more reasoning tokens billed as output.
What would DeepSeek: DeepSeek V4.1 Flash cost you per month?
| Workload | Requests/mo | Avg tokens (in/out) | Est. monthly cost |
|---|---|---|---|
| Light chatbot | 10,000 | 800 / 400 | $1.89 |
| Coding agent | 5,000 | 8,000 / 2,000 | $5.71 |
| RAG pipeline | 30,000 | 4,000 / 500 | $11.51 |
| Doc summarizer | 2,000 | 20,000 / 1,000 | $2.71 |
Estimates use list prices without prompt caching. Caching can cut input cost by up to 90% on repeated context.
About DeepSeek: DeepSeek V4.1 Flash
DeepSeek V4.1 Flash is a sparse mixture-of-experts model from DeepSeek, and the first built on the company's Causal Encoder-Decoder (CED) architecture. It activates 8B parameters on input and 16B on...
Compare DeepSeek: DeepSeek V4.1 Flash with
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Popular head-to-heads — see all on the comparisons index.
Frequently asked questions
How much does DeepSeek: DeepSeek V4.1 Flash cost?
DeepSeek: DeepSeek V4.1 Flash costs $0.049 per 1M input tokens and $0.375 per 1M output tokens; cached input tokens cost $0.0010 per 1M. Verified 2026-10-21 — provider source.
What is the context window?
1.0M tokens, with up to 944K output tokens per response. That's roughly 1311 pages of text in a single request.
Does it support prompt caching?
Yes — cached input is $0.0010/1M, about 98% cheaper than standard input. Agents and RAG workloads with repeated context benefit most.
What's a cheaper alternative?
Mistral: Mistral Nemo saves about 79% on a typical workload with comparable quality.
Official resources
- DeepSeek: DeepSeek V4.1 Flash on OpenRouter — live endpoint, pricing source of record.
- Artificial Analysis leaderboard → — independent intelligence and performance rankings.
- DeepSeek platform → — first-party API documentation and pricing.
- Shred your current bill — paste a CSV and see if switching saves money.