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R1 0528OPEN
May 28th update to the original DeepSeek R1 Performance on par with OpenAI o1, but open-sourced and with fully open reasoning tokens.
Prices update automatically — checked daily against provider list prices.
- $0.91 per 1M tokens, assuming 3 input for 1 output the convention used by Artificial Analysis
- cheaper than 19% of the 191 open-weight models tracked here
- 11 of 14 DeepSeek models tracked here, from cheapest
Benchmarks & performance
Independent benchmark scores for R1 0528, measured by Artificial Analysis. Higher is better. Measurement mode: May '25.
Models at this level cost $0.85 per 1M tokens (median of 23) — this one costs $0.91.
Cheaper and better on this index: GLM 5.3 Flash · Gemini 3.7 Flash · Gemini 3.7 Flash (batch) and 57 more
About this model
R1 0528 is an open-weight AI model by DeepSeek. You can download and self-host it for free; the prices below are hosted-API list prices, tracked daily, for when you prefer convenience over self-hosting.
Frequently asked questions
What is R1 0528?
R1 0528 is an AI language model from DeepSeek. It is open-weight: you can download it and run it on your own hardware, for free. It scores 20.4 on the Artificial Analysis intelligence index.
Is R1 0528 free?
The weights are free and open — you can self-host R1 0528 and pay nothing per token. If you prefer a hosted API, list prices are $0.5 per million input tokens and $2.15 per million output tokens.
What is R1 0528 good at?
Independent benchmarks from Artificial Analysis give it GPQA 81.3%, MMLU-Pro 84.9%, Humanity's Last Exam 15.8%, Long Context Reasoning 56.7%, LiveCodeBench 77%, SciCode 40.3%, MATH-500 98.3%, AIME 89.3%, AIME 2025 76%, IFBench 39.6%, τ²-Bench 36.5%, Terminal-Bench Hard 15.9%. It is particularly used for mathematical reasoning.
Can I self-host R1 0528?
Yes. R1 0528 has open weights, so you can download it and run it on your own GPU or server with tools like Ollama, vLLM or llama.cpp — with no per-token cost.