DeepSeek V4.1 Flash
Updated Oct 24, 2026. Checked daily.
DeepSeek
DeepSeek chat is free. Choose V4.1 Flash, or download weights on Hugging Face.
Free (limited)
- Cost
- Chat is free. The API costs a fraction of a dollar per million tokens, with 50% discounts off-peak.
- Free tier
- Yes. The chat site and app are free, with throttling when the service is busy.
- Privacy default
- Possibly. DeepSeek says some optimization data can come from user input, after de-identification. Use the opt-out described in the DeepSeek privacy policy. Source
Where it ranks
Leader history
No leader change mentions this model yet.
Questions
Is DeepSeek V4.1 Flash good for speed & high volume?
DeepSeek V4.1 Flash is the open weights pick for speed & high volume. Fast, extremely cheap, MIT-licensed, and the smartest model in the budget tier.
How much does DeepSeek V4.1 Flash cost?
Chat is free. The API costs a fraction of a dollar per million tokens, with 50% discounts off-peak.
Does DeepSeek V4.1 Flash train on my chats?
Possibly. DeepSeek says some optimization data can come from user input, after de-identification. Use the opt-out described in the DeepSeek privacy policy.