DeepSeekText Generation/v1/ai/chatReasoning

DeepSeek R1 0528 API

Access DeepSeek R1 0528 through one API key. DeepSeek Open Chain-of-Thought Reasoning.

DeepSeek R1 0528 is the May 2025 update to DeepSeek R1, an open-source reasoning model with fully open reasoning tokens. It suits math, logic and coding problems where a visible chain of thought helps, and replaces the retired original DeepSeek R1.

Full Docs Get API Key — Free $5 Credit

No credit card required. Takes 30 seconds.

DeepSeek R1 0528 API pricing

Pay per request from your YepAPI balance — no subscription, no monthly minimum. Prices updated October 23, 2026.

Token type	Price
Input	$0.74 / 1M tokens
Output (incl. reasoning)	$3.18 / 1M tokens
Context window	164K tokens

What it costs	Per job	Per 1,000
Chat reply1K input + 500 output tokens	$0.0023	$2.33
RAG answer8K input + 800 output tokens	$0.0085	$8.46
Agent step with tools30K input + 2K output tokens	$0.029	$28.56
Long document summary100K input + 2K output tokens	$0.08	$80.36

2,400+

Developers

1.2M+

API calls served

100+

Endpoints

$0.01

Per call

Yep, that's it.

Try it live

Send a message and see DeepSeek R1 0528 respond in real time.

POST/v1/ai/chatdeepseek/deepseek-r1-0528

Message *

Max Tokens

Maximum tokens in the response.

Stream

Real-time tokens

Hit "Send Request" to see the response

DeepSeek R1 0528 specs

Provider	DeepSeek
Model ID	deepseek/deepseek-r1-0528
Endpoint	/v1/ai/chat
Type	Text Generation
Context window	164K tokens
Max output	33K tokens
Reasoning	Yes
OpenAI-compatible	Yes — /v1/ai/chat/completions

How to get a DeepSeek R1 0528 API key

1
Create a free account
Sign up at yepapi.com with Google or email. It takes about 30 seconds and needs no card.
2
Create an API key
Open the dashboard, go to API Keys and create a key. Copy it — it starts with yep_sk_.
3
Call DeepSeek R1 0528
Send a request to /v1/ai/chat with the x-api-key header and model "deepseek/deepseek-r1-0528".
4
Pay as you go
Usage is billed per request from your balance. Top up any amount; there is no subscription.

Strengths

✓

Visible reasoning

Writes out its step-by-step reasoning before answering, which helps on hard problems and for auditing answers.

✓

Open source

Open weights, with performance comparable to closed reasoning models of its generation.

✓

Replaces DeepSeek R1

The current R1 version; the original deepseek-r1 alias now points here.

✓

Low cost

$0.74 per 1M input and $3.18 per 1M output tokens.

Quick start

Copy this snippet and start making calls with DeepSeek R1 0528.

const res = await fetch('https://api.yepapi.com/v1/ai/chat', {
  method: 'POST',
  headers: {
    'x-api-key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "model": "deepseek/deepseek-r1-0528",
    "messages": [
      {
        "role": "user",
        "content": "Explain API gateways in 2 sentences."
      }
    ],
    "maxTokens": 256
  }),
});
const { data } = await res.json();
console.log(data.message.content);

DeepSeek R1 0528 vs similar models

Every model below runs on the same API key — switch by changing the model ID.

Model	Provider	Price	Context
DeepSeek R1 0528	DeepSeek	$0.74 in / $3.18 out per 1M	164K
DeepSeek V4 Flash	DeepSeek	$0.13 in / $0.27 out per 1M	1.0M
DeepSeek V3.2	DeepSeek	$0.41 in / $0.62 out per 1M	164K
DeepSeek V4.1 Flash	DeepSeek	$0.44 in / $1.77 out per 1M	1.0M
DeepSeek V4 Pro 0813	DeepSeek	$0.97 in / $2.92 out per 1M	1.0M
DeepSeek V4 Pro	DeepSeek	$1.41 in / $2.82 out per 1M	1.0M
Nemotron 3 Super	NVIDIA	$0 in / $0 out per 1M	262K
Qwen3.7 Flash	Qwen	$0.04 in / $0.19 out per 1M	1M

Why use DeepSeek R1 0528 through YepAPI?

✓One API key for all models — no separate accounts

✓OpenAI SDK compatible — just change the base URL

✓No monthly minimums — pay per token

✓Switch models with one line of code

✓Full provider passthrough — citations, search results, and all extras included

✓Streaming and non-streaming support on every model

✓Works with Cursor, Claude, LangChain, and any LLM tool

✓Unified billing across all providers

DeepSeek R1 0528 API — pricing, context window & access

DeepSeek R1 0528 is the May 2025 update to DeepSeek R1, an open-source reasoning model with fully open reasoning tokens. It pairs a 163,840-token context window with up to 32,768 output tokens per response, at $0.74 per 1M input and $3.18 per 1M output tokens through YepAPI.

Through YepAPI you call DeepSeek R1 0528 on an OpenAI-compatible endpoint with a single key — the same key that reaches GPT-6, Claude, Gemini, Grok and the SEO, SERP and scraping APIs. Input: text.

What is DeepSeek R1 0528?

DeepSeek R1 0528 is the May 2025 update to DeepSeek R1, an open-source reasoning model with fully open reasoning tokens. It has 671B parameters with 37B active per token and shows its reasoning before the final answer. It accepts text as input, handles up to 163,840 tokens of context and returns up to 32,768 output tokens per call.

Build with DeepSeek R1 0528 via YepAPI

YepAPI serves DeepSeek R1 0528 on the OpenAI-compatible /v1/ai/chat endpoint. Point your base URL at YepAPI, add your key, and set the model string to deepseek-r1-0528 (or the full deepseek/deepseek-r1-0528). Function calling, structured outputs and reasoning settings pass straight through, and switching to any other model on the platform is a one-string change per request.

DeepSeek R1 0528 API pricing — $0.74 / 1M input, $3.18 / 1M output

DeepSeek R1 0528 costs $0.74 per 1M input tokens and $3.18 per 1M output tokens through YepAPI, pay per token with no minimums. Failed calls are never charged, and every request is itemised in your dashboard API Logs.

DeepSeek R1 0528 use cases

It suits math, logic and coding problems where a visible chain of thought helps, and replaces the retired original DeepSeek R1.

Try DeepSeek R1 0528 free

Every new YepAPI account includes $5 in free credit with no card required — enough to test DeepSeek R1 0528 on your own prompts before committing to paid usage. Create an account, copy your key, and call deepseek-r1-0528 right away.

Start generating in 30 seconds

$5 free credit on signup. No credit card required. Pay per call.

Get API Key

What developers say

“Switched from SerpAPI and cut our SERP costs by 80%. Same data quality, way simpler billing.”
Marcus T.
SEO Platform Founder

“One API key for AI models, SERP data, and web scraping. Saved us from managing 4 separate providers.”
Priya S.
Full-Stack Developer

“The $5 free credit let us prototype our entire rank tracking feature before committing. No other API does that.”
Jake R.
Indie Hacker

Frequently asked questions

DeepSeek R1 0528 costs $0.74 per 1M input tokens and $3.18 per 1M output tokens through YepAPI, billed per request with no monthly fee. For example, a chat reply (1K input + 500 output tokens) costs about $0.0023.

Sign up at yepapi.com (Google or email, about 30 seconds), open the dashboard and create an API key. The same key works for DeepSeek R1 0528 and every other model — no separate DeepSeek account or waitlist.

New YepAPI accounts in most countries get free signup credit, enough to test DeepSeek R1 0528 without a card. After that you pay per request at the rates above — there is no subscription.

Use "deepseek/deepseek-r1-0528" as the model on /v1/ai/chat. The short alias "deepseek-r1-0528" also works.

Yes. Point the OpenAI SDK at https://api.yepapi.com/v1/ai with your YepAPI key and set model to "deepseek/deepseek-r1-0528". Streaming works the same way, so existing OpenAI code only needs the base URL and key changed.

DeepSeek R1 0528 supports a 164K token context window with up to 33K output tokens per request.