DeepSeek Reasoner
DeepSeek Reasoner is a language model from DeepSeek released on Jan 20, 2025. It reads text and writes text, with a 64K token context window and up to 66K tokens per reply.
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It costs $0.40 per million input tokens and $1.70 per million output tokens. Cached input bills at $0.20, 50% less than fresh input.
It supports tool calling and prompt caching, and its weights are open, so you can host it yourself.
3 providers serve it, including OrcaRouter, NanoGPT and Helicone. The lowest input price is $0.147 per million tokens at OrcaRouter.
- Modalities
- In / out price
- $0.40 / $1.70 per 1M
- Context
- 64K
- Max output
- 66K
- Released
- Jan 20, 2025
- Knowledge cutoff
- Sep 2025
- Tool calling
- Structured output
- Reasoning
- Prompt caching
- Open weights
- Free to use
DeepSeek Reasoner pricing
USD, as listed on Oct 15, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.
| Input | $0.40 / 1M tokens | |
|---|---|---|
| Output | $1.70 / 1M tokens | |
| Cached input (read) | $0.20 / 1M tokens | 50% off input |
DeepSeek Reasoner providers
3 providers serve it, including OrcaRouter, NanoGPT and Helicone. The lowest input price is $0.147 per million tokens at OrcaRouter. 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 |
|---|---|---|---|---|---|
| OrcaRouter | $0.147 | $0.295 | $0.028 | 1M | 384K |
| NanoGPT | $0.40 | $1.70 | $0.20 | 64K | 66K |
| Helicone | $0.56 | $1.68 | $0.07 | 128K | 64K |
What DeepSeek Reasoner 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 Reasoner through an OpenAI compatible API.
- Tools
tools - Temperature
temperature
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DeepSeek Reasoner questions
How much does the DeepSeek Reasoner API cost?
$0.40 per million input tokens and $1.70 per million output tokens, with cached input at $0.20. The estimator on this page turns that into a monthly bill for your own workload.
What is the context window of DeepSeek Reasoner?
64,000 tokens of input, and it can write up to 65,536 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.
Which providers serve DeepSeek Reasoner?
3 providers serve it, including OrcaRouter, NanoGPT and Helicone. The lowest input price is $0.147 per million tokens at OrcaRouter. Prices differ by host, so the Providers table on this page lists each one with its input and output price.
Does DeepSeek Reasoner support tool calling?
Yes. It accepts tool definitions, which is what an agent needs to call your APIs.
Is DeepSeek Reasoner 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 Reasoner released?
Jan 20, 2025, with training data up to Sep 2025.
Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 15, 2026. The summary is written from these facts.
Building on DeepSeek Reasoner?
I test your real tasks on it and the two closest alternatives, then ship the agent on whichever wins on cost and accuracy.
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