DeepSeek V4.1 Flash 1017 and DeepSeek V4.1 Flash cost the same for 10,000 requests of 2,000 tokens in and 500 out. Both are below their labs' list prices: 90% for DeepSeek V4.1 Flash 1017 and 90% for DeepSeek V4.1 Flash.
Side by side
| DeepSeek V4.1 Flash 1017 | DeepSeek V4.1 Flash | |
|---|---|---|
| Lab | DeepSeek | DeepSeek |
| Released | Oct 17, 2026 | Sep 10, 2026 |
| Context window | 1M tokens | 1M tokens |
| Max output | 384K tokens | 384K tokens |
| Reads | Text, Images | Text, Images |
| Reasoning levels | none, high, max | none, high, max |
| Price per 1M, in / out | $0.03 / $0.12 | $0.03 / $0.12 |
| Lab list price | $0.30 / $1.20 | $0.30 / $1.20 |
| Cached input per 1M | $0.00074 | $0.00074 |
| 10K typical requests | $1.20 | $1.20 |
Prices in US dollars per 1M tokens on Zurelay, live from the catalog. A typical request is 2,000 tokens in and 500 out. Output limits are each lab's.
What they're for
DeepSeek V4.1 Flash 1017 is the October 17, 2026 update to DeepSeek V4.1 Flash, and the model DeepSeek's own API now serves for Flash requests. DeepSeek reports higher scores on every test it published, faster task completion and shorter outputs, at an unchanged price. The Zurelay DeepSeek V4.1 Flash 1017 API serves it through one OpenAI-compatible endpoint at 90% below DeepSeek's peak list price.
DeepSeek V4.1 Flash is the Flash model DeepSeek released on September 10, 2026, the first in its new architecture family. It reads text and images, holds 1M tokens of context and runs in thinking or non-thinking mode. The Zurelay DeepSeek V4.1 Flash API serves it through one OpenAI-compatible endpoint at 90% below DeepSeek's peak list price.
Try both
Specs don't say which model handles your work better. Send the same requests to both and compare the answers, the tokens and the bill. On Zurelay that's a change of model name.
To price a whole month, use the LLM cost calculator.
from openai import OpenAIclient = OpenAI(base_url="https://api.zurelay.com/v1", api_key="YOUR_ZURELAY_KEY")prompt = [{"role": "user", "content": "Summarize this contract: ..."}]# Same key, same code: only the model name changesfor model in ["deepseek-v4.1-flash-1017", "deepseek-v4.1-flash"]: reply = client.chat.completions.create(model=model, messages=prompt) print(model, reply.usage.total_tokens, reply.choices[0].message.content[:200])FAQ
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DeepSeek V4.1 Flash 1017 and DeepSeek V4.1 Flash cost the same for 10,000 requests of 2,000 tokens in and 500 out. Per 1M tokens, DeepSeek V4.1 Flash 1017 is $0.03 input and $0.12 output, and DeepSeek V4.1 Flash is $0.03 and $0.12.
They're the same on Zurelay: 1M tokens each.
Yes. One Zurelay key calls both. With an OpenAI SDK, point it at https://api.zurelay.com/v1 and change only the model name, deepseek-v4.1-flash-1017 or deepseek-v4.1-flash, to switch.
Yes. Each model is served over several routes run by independent sellers, and every route is tested before it serves requests and every day after, with identity, dated-knowledge and reasoning checks that catch an older or different model sold under the name you asked for.
Create a key in seconds, point the SDK you already use at Zurelay, and every request costs up to 90% less from the first token.