DeepSeek V4.1 Flash 1017 Thinking
DeepSeek V4.1 Flash 1017 Thinking is a reasoning model from DeepSeek released on Sep 8, 2026. It reads text and images and writes text, with a 1.05M token context window and up to 393K tokens per reply.
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It costs $0.15 per million input tokens and $0.60 per million output tokens. Cached input bills at $0.003, 98% less than fresh input.
It supports tool calling, structured JSON output and prompt caching, and its weights are open, so you can host it yourself.
6 providers serve it, including Vercel AI Gateway, DevPass (LLM Gateway) and Kilo Gateway.
- Modalities
- In / out price
- $0.15 / $0.60 per 1M
- Context
- 1.05M
- Max output
- 393K
- Released
- Sep 8, 2026
- Knowledge cutoff
- n/a
- Tool calling
- Structured output
- Reasoning
- Prompt caching
- Open weights
- Free to use
DeepSeek V4.1 Flash 1017 Thinking pricing
USD, as listed on Oct 17, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.
| Input | $0.15 / 1M tokens | |
|---|---|---|
| Output | $0.60 / 1M tokens | |
| Cached input (read) | $0.003 / 1M tokens | 98% off input |
DeepSeek V4.1 Flash 1017 Thinking providers
6 providers serve it, including Vercel AI Gateway, DevPass (LLM Gateway) and Kilo Gateway. Each host sets its own price and limits, so the cheapest one is not always the one with the longest context.
| Provider | Input /M | Output /M | Cache read /M | Context | Max output |
|---|---|---|---|---|---|
| Vercel AI Gateway | $0.15 | $0.60 | $0.003 | 1M | 384K |
| DevPass (LLM Gateway) | $0.15 | $0.60 | $0.003 | 1.05M | 1.05M |
| Kilo Gateway | $0.15 | $0.60 | $0.003 | 1.05M | 393K |
| LLM Gateway | $0.15 | $0.60 | $0.003 | 1.05M | 393K |
| NanoGPT | $0.15 | $0.60 | $0.003 | 1.05M | 393K |
| Requesty | $0.50 | $1.50 | $0.05 | 1.05M | 393K |
What DeepSeek V4.1 Flash 1017 Thinking costs per month
Pick a workload close to yours or type your own volumes.
Supported request parameters
What you can set when you call DeepSeek V4.1 Flash 1017 Thinking through an OpenAI compatible API.
- Tools
tools - Structured outputs
structured_outputs - Reasoning
reasoning
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DeepSeek V4.1 Flash 1017 Thinking questions
How much does the DeepSeek V4.1 Flash 1017 Thinking API cost?
$0.15 per million input tokens and $0.60 per million output tokens, with cached input at $0.003. The estimator on this page turns that into a monthly bill for your own workload.
What is the context window of DeepSeek V4.1 Flash 1017 Thinking?
1,048,576 tokens of input, and it can write up to 393,216 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.
Which providers serve DeepSeek V4.1 Flash 1017 Thinking?
6 providers serve it, including Vercel AI Gateway, DevPass (LLM Gateway) and Kilo Gateway. Prices differ by host, so the Providers table on this page lists each one with its input and output price.
Does DeepSeek V4.1 Flash 1017 Thinking support tool calling?
Yes. It accepts tool definitions and can return JSON that matches a schema, which is what an agent needs to call your APIs.
Is DeepSeek V4.1 Flash 1017 Thinking open source?
Its weights are published, so you can run it on your own hardware or a cloud of your choice. Read the license before commercial use.
When was DeepSeek V4.1 Flash 1017 Thinking released?
Sep 8, 2026.
Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 17, 2026. The summary is written from these facts.