One agent session
1M input tokens and 100K output tokens, no caching.
- Input1M x $0.30 = $0.30
- Output0.1M x $1.20 = $0.12
$0.42per session
DeepSeek - Open weights
DeepSeek V4.1 Flash pricing and specs
DeepSeek V4.1 Flash is an open-weights model from DeepSeek that costs $0.30 per 1M input tokens and $1.20 per 1M output tokens on the first-party API, with a 1M-token context window.
Last verified from api-docs.deepseek.com. All sources
- Input / 1M
- $0.30
- Output / 1M
- $1.20
- Context
- 1M tokens
- Weights
- Open
Pricing per 1M tokens
| Item | Price / 1M tokens |
|---|---|
| Input | $0.30 |
| Output | $1.20 |
| Cache read | $0.006 |
Note: Prices are DeepSeek's peak rates. Off-peak rates are half of peak (input 0.15, output 0.6, cache hit 0.003 per 1M): peak hours are 01:00-04:00 and 06:00-10:00 UTC Monday to Friday excluding Chinese public holidays, all other hours (weekends and Chinese public holidays in full) are off-peak. input is the cache-miss price and cache read the cache-hit price; no separate cache write or batch price is published. API model name deepseek-flash currently serves DeepSeek-V4.1-Flash-1017 (updated 2026-10-17, pricing unchanged); legacy names deepseek-v4-flash and deepseek-v4-flash-vision-exp are routed to it at the Flash price. Thinking and non-thinking modes; vision supported. Context is stated as 1M on the pricing page (exact token count not given); max_tokens upper bound is 384K (393216) per the Chat Completions API reference. release date is the V4.1-Flash launch in the change log. The Hugging Face repo (MIT) does not mention the 1017 checkpoint served by the API. Gateway id is the versioned 1017 listing; deepseek/deepseek-v4.1-flash is also listed on the gateway.
Specs
- Context window
- 1,000,000 tokens
- Max output
- 393,216 tokens
- Release date
- Provider
- DeepSeek
- API model id
deepseek-flash- Vercel AI Gateway id
deepseek/deepseek-v4.1-flash-1017- Weights
- Open weights
- License
- MIT
- Weights download
- huggingface.co
What DeepSeek V4.1 Flash costs in practice
Worked from the standard list rates above, with the math shown so you can swap in your own token counts.
A chat app
10,000 requests a day at 2K input and 500 output tokens each.
- Input20M x $0.30 = $6.00
- Output5M x $1.20 = $6.00
$12.00per day
$360.00 per 30-day month
The same session at a 90% cache hit
90% of the input is read from the prompt cache. The one-time cache write premium is not included.
- Cached input0.9M x $0.006 = $0.0054
- Uncached input0.1M x $0.30 = $0.03
- Output0.1M x $1.20 = $0.12
$0.1554per session
Compare with
| Model | Input / 1M | Output / 1M |
|---|---|---|
| DeepSeek V4.1 Flash (this page) | $0.30 | $1.20 |
| GPT-5.6 LunaOpenAI | $0.20 | $1.20 |
| MiniMax-M2.5MiniMax | $0.30 | $1.20 |
| MiniMax-M2.7MiniMax | $0.30 | $1.20 |
| MiniMax-M3MiniMax | $0.30 | $1.20 |
| DeepSeek V4 ProDeepSeek | $1.32 | $3.96 |
Compare
Side-by-side pages with both models' prices, specs, cost examples and like-for-like benchmark rows.
- DeepSeek V4.1 Flash vs Claude Haiku 5.5Open weights vs closed
- DeepSeek V4.1 Flash vs GPT-6 LunaOpen weights vs closed
- DeepSeek V4.1 Flash vs GLM-5.3-FlashSimilar price, same tier
- DeepSeek V4.1 Flash vs Qwen3.8-FlashSimilar price, same tier
- DeepSeek V4.1 Flash vs Gemini 3.5 Flash-LiteSimilar price, same tier
- DeepSeek V4.1 Flash vs MiniMax-M3Similar price, same tier
- DeepSeek V4.1 Flash vs Mistral Small 4Similar price, same tier
Related reading
- DeepSeek V4.1-Flash-1017: Benchmarks vs Opus 5, Pricing, Switch?DeepSeek V4.1-Flash-1017 jumps 11 points on Terminal-Bench 4.0 at the same deepseek-flash price. Benchmarks vs Opus 5, K3, GLM-5.3 and when to switch.
- Where to Run DeepSeek V4.1 Flash Free and CheapDeepSeek V4.1 Flash replaced V4 Flash. Official API: $0.15 input, $0.60 output off-peak. OpenRouter hosts start near $0.05. MIT weights are on Hugging Face.
- DeepSeek 4.1 Flash as a Daily Coding Model: Cache, Peak Hours and LimitsDeepSeek 4.1 Flash as a daily coding model: what a session costs, how peak hours double the bill, why caching matters, and where the subsidy argument holds.
- DeepSeek V4 Flash Vision Exp: Experimental Vision, Limits, and How to Run It in OpenCodeDeepSeek V4 Flash Vision Exp guide: supported image formats, three input methods, the 384-token per-image cap, and how to run it in OpenCode today.
- We Read DeepSeek Harness: What 453K Lines of Agent Runtime Actually SayDeepSeek Harness (dsh) code read: a 453K-line plugin runtime on a vendored Cordis fork, three patterns worth stealing, and the gaps the launch does not mention.
- DeepSeek V4 Flash Is 90% Off Through Novita on Vercel AI Gateway: The Cost MathDeepSeek V4 Flash via Novita on Vercel AI Gateway was 90% off for Pro customers through August 11. The before/after cost math and the provider-pinning setup.
FAQ
How much does DeepSeek V4.1 Flash cost per million tokens?
DeepSeek V4.1 Flash costs $0.30 per 1M input tokens and $1.20 per 1M output tokens on DeepSeek's first-party API, per api-docs.deepseek.com on October 17, 2026. Per 1M tokens, cache reads cost $0.006.
What is DeepSeek V4.1 Flash's context window?
DeepSeek V4.1 Flash has a 1,000,000-token context window and returns up to 393,216 output tokens per response.
Are DeepSeek V4.1 Flash's weights open?
Yes. DeepSeek V4.1 Flash's weights are published at https://huggingface.co/deepseek-ai/DeepSeek-V4.1-Flash under the MIT.
When was DeepSeek V4.1 Flash released?
DeepSeek released DeepSeek V4.1 Flash on September 10, 2026.
Sources
Last verified from api-docs.deepseek.com.
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