DeepSeek-V4.1-Flash
No published training cutoff
deepseek-flash
$0.30 in, $1.20 out per 1M tokens
DeepSeek’s strongest model: long-horizon coding agents, reasoning, 1M-context tasks. Open weights (MIT).
Model iddeepseek-v4-pro
Price$1.32 in, $3.96 out per 1M tokens
Checked29 September 2026
At least1,868events since its release on 24 April 2026
83 historic, 427 major. 203 days of news.
DeepSeek doesn’t publish a training cutoff, so we count from its release date. The real gap is larger.
7 ways to use DeepSeek-V4-Pro, with the model id each provider expects.
| Provider | Model id | Endpoint | Docs |
|---|---|---|---|
| DeepSeek API | deepseek-v4-pro |
https://api.deepseek.com |
api-docs.deepseek.com |
| DeepSeek API (Anthropic format) | deepseek-v4-pro |
https://api.deepseek.com/anthropic |
api-docs.deepseek.com |
| Alibaba Cloud Model Studio | deepseek-v4-pro-0813 |
alibabacloud.com | |
| OpenRouter | deepseek/deepseek-v4-pro-0813 |
openrouter.ai | |
| OpenRouter (preview 0423) | deepseek/deepseek-v4-pro |
openrouter.ai | |
| Hugging Face | huggingface.co | ||
| Web app | chat.deepseek.com |
| Input | $1.32 per 1M tokens |
|---|---|
| Output | $3.96 per 1M tokens |
| Cache read | $0.044 per 1M tokens |
As published: “per 1M tokens (USD), peak-hour list price; off-peak is half (input 0.66, output 1.98, cache hit 0.022). Peak = 01:00-04:00 and 06:00-10:00 UTC Mon-Fri”.
Source: api-docs.deepseek.com, checked 29 September 2026.
What its maker marketed at launch, and what people found later, each with its source.
1.6T total / 49B active parameters, MIT license, 1M-token context (paper: ‘Towards Highly Efficient Million-Token Context Intelligence’).
Found after launch
GA release greatly strengthened agent performance in production (e.g. Terminal Bench 2.1 87.9, Toolathlon-Verified 74.1 per DeepSeek).
Found after launch
Thinking mode supports three effort levels; non-thinking mode also available.
Found after launch
DeepSeek API natively speaks the Responses API format and is adapted for Codex; Anthropic Messages format also supported.
Found after launch
0813 weights ship with an attached DSpark speculative-decoding module for faster inference.
Preview 2026-04-24, GA snapshot DeepSeek-V4-Pro-0813 on 2026-08-13 (same id deepseek-v4-pro). Text-only (no vision). DeepSeek said service continues past 2026-09-14 until further notice. Knowledge cutoff not published.
curl https://api.deepseek.com/chat/completions \
-H "Authorization: Bearer $DEEPSEEK_API_KEY" -H "Content-Type: application/json" \
-d '{"model":"deepseek-v4-pro","reasoning_effort":"high","messages":[{"role":"user","content":"Hello"}]}'
Sources: https://api-docs.deepseek.com/quick_start/pricing · https://api-docs.deepseek.com/updates · https://huggingface.co/deepseek-ai/DeepSeek-V4-Pro-0813
Paste this into a new chat. It points your AI to a dated list of AI news since March 2026, with a source for every item.
Using Gemini, Grok or another assistant? Copy the prompt and paste it into a new chat. Only Claude and ChatGPT have a link that opens with a prompt filled in.
Files for every cutoff, with their sizes: Briefings.
For developers: an MCP server is planned. For AI agents