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R1 0528

Open weightTools

DeepSeek · Released May 2025 · Knowledge cutoff March 2025

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...

It is part of DeepSeek's open-weight line, known for delivering near-frontier reasoning and coding quality at a fraction of typical frontier pricing.

Facts and pricing

Provider
DeepSeek
Context window
164K tokens
Input price
5.5 credits / 1M tokens ($0.50 raw)
Output price
23.7 credits / 1M tokens ($2.15 raw)
Vision (image input)
No
Tool calling
Yes
Extended reasoning
No

Credits are what Zeplik bills: 1 credit = $0.10, computed from the raw provider rate with a 1.10x margin. Raw prices shown per 1M tokens.

Try R1 now

R1 0528 is a serving variant of R1, so Zeplik offers the R1 row and routes your prompt there.

Ask R1 anything. Your prompt opens in the Zeplik app with this model selected.

R1

Or open Zeplik with R1 already selected

What R1 0528 is best for

Example prompts

Prompts that suit a open weight model like R1 0528:

DeepSeek family

ModelContextInput cr/MOutput cr/MReleased
DeepSeek V4 Flash Vision Exp1.0M2.47.3August 2026
DeepSeek V4 Pro 08131.0M6.419.1August 2026
DeepSeek V4 Pro 0813 (batch)1.0M14.543.6August 2026
DeepSeek V4 Flash 07311.0M0.722.0July 2026
DeepSeek V4 Flash 0731 (batch)1.0M1.53.1July 2026
DeepSeek V4 Pro 04231.0M9.118.2April 2026
DeepSeek V4 Flash 04231.0M0.931.9April 2026
DeepSeek V3.2164K3.04.4December 2025
DeepSeek V3.2 Exp164K3.04.5September 2025
DeepSeek V3.1 Terminus131K3.011.0September 2025

All 16 DeepSeek models

Frequently asked questions

What is R1 0528?
R1 0528 is an AI model by 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...
How much does R1 0528 cost on Zeplik?
Input tokens cost 5.5 credits per million and output tokens 23.7 credits per million (1 credit = $0.10; the raw provider rates are $0.50 and $2.15 per million). New accounts start with free credits.
How long can a conversation with R1 0528 be?
R1 0528 has a 164K-token context window (163,840 tokens), which covers the conversation plus any documents you attach.
Does R1 0528 support images and tools?
R1 0528 is text-only and supports tool calling.

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More you can do with R1 0528

R1 0528 - DeepSeek AI Model | Zeplik Chat