How much does R1 0528 cost?

R1 0528 costs $0.50 per million input tokens and $2.15 per million output tokens on standard pricing. A workload of 20M input and 5M output tokens a month is about $21.

What is the context length of R1 0528?

R1 0528 accepts up to 163,840 tokens (164K) of input and can return up to 32,768 tokens in one response.

Does R1 0528 support tool calling and structured outputs?

Yes, R1 0528 supports function/tool calling and structured (JSON) outputs. Supported tools: Function calling, Structured outputs, JSON mode, Reasoning, Log probabilities, Deterministic seed, Prompt caching.

What inputs and outputs does R1 0528 support?

R1 0528 accepts Text as input and produces Text as output.

When was R1 0528 released?

R1 0528 was released by DeepSeek in 2025-05-28.

R1 0528

deepseek-r1-0528

API Provider site

May 28th update to the [original DeepSeek R1](/deepseek/deepseek-r1) Performance on par with [OpenAI o1](/openai/o1), but open-sourced and with fully open reasoning tokens. It's 671B parameters in size, with 37B active... Built by DeepSeek.

Prices updated recently

Input price

$0.50

per 1M tokens · Standard

Output price

$2.15

per 1M tokens · Standard

Input limit

164K

tokens

Output limit

33K

tokens

Input formats

TextImageVideoAudioPDF

Output formats

TextImageVideoAudioPDF

Compare

R1 0528 price history

2 price records since 9/25/2026

R1 0528 cost calculator

Input20M tokens

Output5M tokens

$21/month

Standard pricing

Overview

What is R1 0528?

R1 0528 is a text & reasoning model from DeepSeek. May 28th update to the [original DeepSeek R1](/deepseek/deepseek-r1) Performance on par with [OpenAI o1](/openai/o1), but open-sourced and with fully open reasoning tokens. It's 671B parameters in size, with 37B active... Its 164K context window and $0.50 input price make it a candidate for quality-focused production applications.

Content workflowsClassification

Rates

R1 0528 pricing

Pricing is based on token usage. Provider-specific caching, batch, regional, and tool charges may affect the final cost.

Input · Standard

$0.50

Per 1M tokens

Cached input · Standard

$0.35

Per 1M tokens

Capabilities

R1 0528 Tools

Tools available when using R1 0528 through supported provider APIs.

Function calling

Supported

Structured outputs

Supported

JSON mode

Supported

Reasoning

Supported

Built-in web search

Not supported

Log probabilities

Supported

Deterministic seed

Supported

Parallel tool calls

Not supported

Prompt caching

Supported

Strengths and limitations

Strengths

Priced at $0.50 input and $2.15 output per million tokens.
A 164K context window covers most focused application workflows.
Supports text & reasoning workloads in one model.

Limitations

Generated tokens cost 4× more than input tokens, which matters for verbose responses.
The 164K context window is smaller than several long-context alternatives.
Arena Elo and MMLU-Pro are directional; test accuracy, latency and reliability on your own workload before committing.

Arena Elo, MMLU-Pro and pricing figures are illustrative; validate current vendor terms before purchase.

Same provider