DeepSeek R1 — Specifications
Compiled by Mustafa Ihsan from the vendor’s published documentation · Last updated
| Developer | DeepSeek |
|---|---|
| Type | LLM (MoE, reasoning) |
| Modality | Text → Text |
| Parameters | 671B total / 37B active (MoE) |
| Context window | 128K |
| License | MIT (open) |
| Open weights | Yes |
| Released | 2025 |
| Input price | $0.50 /1M |
| Output price | $2.15 /1M |
| API providers | DeepSeek, DeepInfra, OpenRouter |
Run it locally
| VRAM (4-bit) | ~400 GB |
|---|---|
| Minimum GPU | Multi-GPU server |
What is DeepSeek R1?
DeepSeek R1 is the landmark open reasoning model — a 671B mixture-of-experts activating
37B parameters per token, MIT-licensed, with a 128K context window. It delivered
frontier-class chain-of-thought reasoning at a fraction of proprietary cost and is the model
that made open reasoning weights a mainstream option rather than a research curiosity.
Two things follow from the architecture. First, the API is genuinely cheap at $0.50 in /
$2.15 out per million tokens, because only 37B of the 671B parameters are active on any given
token. Second, self-hosting is not cheap at all: the full weights need roughly 400 GB of VRAM
even at 4-bit quantisation, which means a multi-GPU server, not a workstation. The MIT
licence gives you the right to run it, but the hardware bill is what decides whether you
will. For most teams the correct reading is that R1 is an API model that happens to be
auditable and portable — you can move providers, inspect the weights, and never be locked in,
without personally operating an eight-GPU node. If you want R1-style reasoning on hardware
you own, the 70B distill is the model to look at instead.
DeepSeek R1 pricing: API cost per 1M tokens
| Input (per 1M tokens) | $0.500 |
|---|---|
| Output (per 1M tokens) | $2.15 |
| Output/input ratio | 4.3× |
| Blended (4:1 in:out) | $0.830 per 1M tokens |
What DeepSeek R1 costs per month
Real monthly spend at a 4:1 input-to-output mix — the ratio a typical chat or RAG workload actually produces.
| Workload | Tokens / month | Cost / month |
|---|---|---|
| Side project | 1M in / 0.25M out | $1.04 |
| Small team | 20M in / 5M out | $21 |
| Production | 200M in / 50M out | $208 |
Run your own numbers in the AI API cost calculator.
Cheaper alternatives to DeepSeek R1
| Model | Blended $/1M | You save |
|---|---|---|
| DeepSeek V4-Pro open | $0.522 | 37% cheaper |
| DeepSeek V4-Flash open | $0.168 | 80% cheaper |
| Llama 4 Maverick open | $0.320 | 61% cheaper |
Self-host or pay the API?
DeepSeek R1 is open-weight, so you can run it yourself. It needs ~400 GB of VRAM at 4-bit (Multi-GPU server). Self-hosting only beats the API once your volume is high enough to keep that hardware busy — the self-hosting vs API calculator works out the break-even point for your token volume.
Frequently asked questions
How much does DeepSeek R1 cost per 1M tokens?
DeepSeek R1 costs $0.500 per 1M input tokens and $2.15 per 1M output tokens. At a typical 4:1 input-to-output mix that blends to about $0.830 per 1M tokens.
How much does DeepSeek R1 cost per month?
A small-team workload of 20M input and 5M output tokens a month costs about $21 on DeepSeek R1. A side project (1M in / 0.25M out) costs roughly $1.04.
What is a cheaper alternative to DeepSeek R1?
DeepSeek V4-Pro is the strongest cheaper option in our database at $0.522 per 1M blended — about 37% less than DeepSeek R1. It is also open-weight, so self-hosting is an option.
Can I run DeepSeek R1 locally?
Yes. DeepSeek R1 is open-weight and needs about ~400 GB of VRAM at 4-bit quantisation (Multi-GPU server).
Why does DeepSeek R1 charge more for output than input?
Output tokens are generated one at a time and cannot be batched the way a prompt can, so they cost the provider more to serve. DeepSeek R1 charges 4.3× more for output, which is why prompt-heavy workloads are far cheaper to run than generation-heavy ones.
See every DeepSeek model priced side by side: DeepSeek API pricing.
Prices are the published list rates for the model's primary API and are reviewed as providers change them. Volume, batch and cached-input discounts are not included. Compare every model side by side in the AI models database or the LLM leaderboard.