DeepSeek V4.1 Flash
DeepSeek V4.1 Flash
Frontier-adjacent answers for thirty cents per million input tokens, with the weights under MIT.
Updated
The read
V4.1 Flash is the first model in DeepSeek's new architecture family, released on 10 September, and it replaced V4 Flash outright on the API. It scores above V4 Pro on both independent leaderboards while costing about a quarter as much, takes a million tokens of context and reads images. The weights are published under MIT. For high-volume work where the bill is the constraint, it is one of the best bargains in the index.
Where it shines
- Beats DeepSeek's own V4 Pro at about a quarter of the price
- MIT licence on the published weights
- Million-token context and 384,000 tokens of output
Worth knowing first
- Self-hosting still means serving a very large sparse model
- Hosted in China, with the data policy questions that brings
Index score
88.3
Provisional. This score is read from the product's public capability, not from the one-prompt rebuild the fully reviewed entries went through, so treat it as a placing rather than a verdict.
- Rank
- 07 of 73
- Builds
- LLMs
- Category
- Open weights
- Output
- MIT-licensed weights, plus a very cheap API
- Pricing
- Free tier
- Best for
- High-volume work where the token bill is the constraint
Scores are our own editorial judgement, weighted craft 55, speed 10, control 15 and value 20.
Also worth a look
Full index- 05GLM-5.3 FlashGLM-5.3 FlashProvisionalA fast, MIT-licensed open model that human voters rank beside the big flagships.Open weightsFree tier89.6
- 06Xiaomi MiMo V2.6 ProMiMo V2.6 ProProvisionalThe strongest large open-weights model on the independent index, under MIT, for under a dollar out.Open weightsFree tier89.4
- 10GLM-5.3GLM-5.3ProvisionalThe same base as GLM-5.2, re-trained into one of the strongest open models available.Open weightsFree tier87.9
