How much does R1 0528 cost?

R1 0528 costs $0.50/M input tokens and $2.15/M output tokens, with separate rates for Cache Read at $0.35/M tokens.

What is the context length of R1 0528?

R1 0528 has a 163,840 token context window. It supports up to 32,768 completion tokens.

Does R1 0528 support tool calling and structured outputs?

Yes. R1 0528 accepts tools and tool_choice for function calling on 1 of the 3 providers serving it, and requests that send tools are routed to those providers. It also supports structured outputs via a JSON schema in response_format.

Which providers serve R1 0528?

R1 0528 is served by 3 providers on OpenRouter: DeepInfra, SiliconFlow, and StreamLake. Requests are routed to the best available provider, with automatic failover to the others, and you can pin or exclude providers with provider routing.

When was R1 0528 released?

R1 0528 was released on May 28, 2025. Its knowledge cutoff is March 31, 2025.

DeepSeek: R1 0528

deepseek/deepseek-r1-0528

Model weights

Compare

May 28th update to the original DeepSeek R1 Performance on par with OpenAI o1, but open-sourced and with fully open reasoning tokens. It's 671B parameters in size, with 37B active in an inference pass.

Fully open-source model.

Modalities

In / out price

$0.50 / $2.15per 1M

Context

164K

Released

May 28, 2025

Knowledge cutoff

Mar 2025

Providers

Different companies host the same model. OpenRouter routes your request to one of them based on the routing mode you pick: Balanced (price + speed), Nitro (fastest), or Floor (cheapest).

Latency / throughput


$0.571	$2.286	--	3.17s	43 tok/s	100.00%
$0.50	$2.18	--	1.89s	20 tok/s	97.42%
$0.50	$2.15	$0.35	0.76s	13 tok/s	99.00%

Input $0.571Output $2.286
43 tok/s100.00% uptime
Input $0.50Output $2.18
20 tok/s97.42% uptime
Input $0.50Output $2.15
13 tok/s99.00% uptime

Pricing

The average price customers actually pay for this model, next to the prices providers post. Caching and discounts mean the price actually paid is often well below the listed one.

Weighted average

Input

$0.5164/M tokens

Output

$2.239/M tokens

R1 0528 — Price history

Price history

No effective price data for this selection

$0.456	$2.15	29.2%	35.2%
$0.500	$2.18	49.0%	17.2%
$0.571	$2.29	0.0%	47.6%

Effective in $0.456Effective out $2.15
Token share
35.2%
Effective in $0.500Effective out $2.18
Token share
17.2%
Effective in $0.571Effective out $2.29
Token share
47.6%

Performance

Throughput is how fast the model writes (tokens per second — higher is better). Latency is total round-trip time (lower is better). TTFT is time-to-first-token — how long before you see anything appear (lower is better).

Throughput

43tok/s

P50, best across providers

Latency

0.76s

P50, best provider

Latency / throughput

AutoExacto benchmarks

GPQA DiamondTAU-BenchStreamLake80.1%--DeepInfra76.7%--Novita77.9%65.3%SiliconFlow80.3%47.3%auto-routing77.6%48.0%

Uptime

Uptime is the percentage of the past 3 days that at least one provider was responding to requests. Availability is the percentage of time that inference was successfully served. OpenRouter continuously monitors and uses the next-best provider when one returns an error.

Uptime (3d)

100.00%

Availability (3d)

99.01%

Availability over the last 3 days

Last 72 hours

Availability 99.01%

3 Days Ago2 Days AgoYesterdayNow

Availability over the last 24 hours

OpenRouter Availability

98.62%

Without Routing

96.77%

When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the Endpoints API. Learn more about our load balancing and provider routing options.

Benchmarks

Scores on standardized evaluations and this model’s own outputs on shared benchmark prompts. Higher percentages are better — and each rank shows where this model lands among the models evaluated on that source.

Benchmark score summary for DeepSeek: R1 0528 (Artificial Analysis and Design Arena)
Source	Benchmark	Score
Artificial Analysis	DeepSeek R1 0528 (May '25) GPQA Diamond	81.3%
Artificial Analysis	DeepSeek R1 0528 (May '25) HLE	15.8%
Artificial Analysis	DeepSeek R1 0528 (May '25) IFBench	39.6%
Artificial Analysis	DeepSeek R1 0528 (May '25) τ²-Bench Telecom	36.5%
Artificial Analysis	DeepSeek R1 0528 (May '25) AA-LCR	55.7%
Artificial Analysis	DeepSeek R1 0528 (May '25) CritPt	1.4%
Artificial Analysis	DeepSeek R1 0528 (May '25) LiveCodeBench	77.0%
Artificial Analysis	DeepSeek R1 0528 (May '25) Terminal-Bench Hard	15.9%
Artificial Analysis	DeepSeek R1 0528 (May '25) MMLU-Pro	84.9%
Artificial Analysis	DeepSeek R1 0528 (May '25) AIME 2025	76.0%
Artificial Analysis	DeepSeek R1 0528 (May '25) AIME	89.3%
Artificial Analysis	DeepSeek R1 0528 (May '25) MATH-500	98.3%
Design Arena	DeepSeek-R1-0528 Models Arena 3D Elo	1091
Design Arena	DeepSeek-R1-0528 Models Arena Code Categories Elo	1128
Design Arena	DeepSeek-R1-0528 Models Arena Data Visualization Elo	1179
Design Arena	DeepSeek-R1-0528 Models Arena Game Development Elo	1087
Design Arena	DeepSeek-R1-0528 Models Arena SVG Elo	1028
Design Arena	DeepSeek-R1-0528 Models Arena UI Component Elo	1093
Design Arena	DeepSeek-R1-0528 Models Arena Website Elo	1141

Apps

Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for.

Janitor AI

Janitor AI is a chatbot platform where users create and chat with custom AI characters for interactive roleplay, storytelling, and immersive fiction.

15.5Btokens

SillyTavern

SillyTavern is the LLM frontend for power users, a chat interface that connects to any model and gives deep control through character creation, roleplay, and prompt customization.

1.21Btokens

Chub AI

GenAI for everyone

669Mtokens

Sophia's LoreBary

Organize and enhance your roleplay creations.

567Mtokens

Negotiation Research

new

494Mtokens

Top 5 Apps

670M

Rest of OpenRouter

602M

Not currently available through EU in-region routing. In-region routing docs

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Providers