$0.25 per 1M input tokens and $0.95 per 1M output tokens (cheapest host: DeepInfra).
There is no free API; the cheapest paid price is $0.25 per 1M input tokens. The weights are open, so you can run it yourself.
#146 of 334 in Chat & Knowledge, #73 of 239 in Coding, #129 of 242 in Agents & Tool Use, #68 of 195 in Writing & Language.
On Arena Text · creative writing, DeepSeek V3.1 scores 1,401 vs 1,349 — higher.
Through the API of AWS Bedrock, CoreWeave, DeepInfra, Featherless, SambaNova and 1 more.
128K tokens, with up to 33K output tokens.
Released 2025-08-21. It has been superseded by DeepSeek V3.1 Terminus.
Yes, the weights are open (MIT licence).
The weights are open and can be self-hosted; hardware needs are not confirmed yet.
No, it accepts text only.
DeepSeek V3.1 is an open-weights language model from DeepSeek, released Aug 2025, the successor to DeepSeek V3.
GLM 5.3 Flash (cheaper), GPT-5.6 Terra (better), GLM 5.2 (open weights).