DeepSeek-R1-0528
Last Updated on: Sep 12, 2025
DeepSeek-R1-0528
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What is DeepSeek-R1-0528?
DeepSeek R1 0528 is the May 28, 2025 update to DeepSeek’s flagship reasoning model. It brings significantly enhanced benchmark performance, deeper chain-of-thought reasoning (now using ~23K tokens per problem), reduced hallucinations, and support for JSON output, function calling, multi-round chat, and context caching.
Who can use DeepSeek-R1-0528 & how?
  • Developers & Engineers: Integrate state-of-the-art reasoning and function calling in chatbots, code assistants, and automation pipelines.
  • Researchers & Benchmarkers: Study large-token chain-of-thought behaviors and compare performance on open-source models.
  • Enterprises & API Users: Deploy via DeepSeek’s API or private instances for production systems.
  • Tool Makers: Utilize JSON output & function calling to build structured workflows.
  • Open-Source Advocates: Use permissively licensed weights for fine-tuning or distillation.

How to Use DeepSeek R1 0528?
  • Via API or Chat Website: Continue using the DeepSeek-R1 endpoint; “DeepThink” mode activates deeper reasoning.
  • Download Weights: Available under MIT license on Hugging Face (`deepseek-ai/DeepSeek-R1-0528`).
  • Call Features: Supports JSON output, function calling, context caching, and multi-round conversation.
  • Performance Settings: Uses temperature 0.6, top_p 0.95, max gen length 64K tokens.
  • Scale Up: Use distilled Qwen3-8B variant for lighter deployment with similar reasoning behavior.
What's so unique or special about DeepSeek-R1-0528?
  • Benchmarks Leap: MMLU+ 1 pt, GPQA Diamond jumps from 71.5% to 81.0%, AIME accuracy 87.5%.
  • Deeper Reasoning Chains: Now uses ~23K tokens per reasoning step—nearly double previous depth.
  • Structured Output & Functions: Supports JSON, function calling, and persistent context caching for structured applications.
  • Open-Source Release: Fully MIT licensed and available for private deployment or fine-tuning.
Things We Like
  • Significant boosts in reasoning and coding benchmarks
  • Supports function calling and structured JSON output
  • Reduced hallucination rates in complex tasks
  • “DeepThink” mode enables deeper thought chains
  • Fully open-source weights under permissive license
Things We Don't Like
  • Increased compute and memory demands due to deeper reasoning
  • Still slightly behind OpenAI's o4‑mini in some coding benchmarks
  • Distilled variants (Qwen3‑8B) may not fully match full model across all tasks
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FAQs

A May 28, 2025 update to DeepSeek-R1 with deeper reasoning chains, improved benchmarks, reduced hallucinations, and structured output support.
GPQA Diamond rose from 71.5% to 81.0%, AIME accuracy is ~87.5%, and small improvements seen in MMLU & LiveCodeBench.
JSON output, function calling, multi-round conversation context caching, and deeper internal chain-of-thought reasoning.
Yes—weights are available under MIT license on Hugging Face for local or private deployment.
Use the “DeepThink” mode in chat or API—no need for manual prefixes.

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