DeepSeek releases V4.1-Flash-1017 and open-sources its weights
What happened
On 17 October 2026, DeepSeek released the DeepSeek-V4.1-Flash-1017 model, which is now available on its website, app and API, with model weights open-sourced on Hugging Face and ModelScope. According to The Decoder, the model outperforms larger models on agentic tasks and sharply lowers the cost per task. The release and the open-sourcing of the weights were completed together, with no further reports so far.
Written by AI from the reports · updated 3 h ago
Timeline
Follow the reports to see the event from each side.
- The DecoderSelectedDeepseek V4.1 Flash 1017 beats larger rivals in agentic tasks while once again massively cutting per-task costs
Deepseek has released V4.1-Flash-1017 as an open-weight model that posts better benchmarks, finishes tasks faster, and produces shorter outputs than its predecessor. The company is also opening up its internal search engine through new Search and Fetch APIs at $0.75 per 1,000 calls. API users in tools like Claude Code and Codex get free access for now.
Heat of this event
Current heat 9·Peak in the comparable range 10（Oct 17 19:00）·Change over 24 hours in the comparable range –
The trend compares only the same accounts observed without a break, so its range can be narrower than the current heat count. Move the pointer or tap the chart to see each hour; with a keyboard, use the left and right arrow keys.