Open-Source-O1/Open-O1 resource

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

1340 stars · 54 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Open O1 is an open-source effort to replicate the reasoning capabilities of OpenAI's proprietary O1 model by curating chain-of-thought SFT data and fine-tuning LLaMA and Qwen models with it. The project releases the resulting models and datasets on Hugging Face, targeting enhanced long-reasoning and problem-solving abilities in smaller open models.

Use cases

• train an open-source model with o1-like reasoning
• download chain-of-thought SFT data for LLM fine-tuning
• fine-tune LLaMA or Qwen for long-reasoning tasks
• experiment with test-time scaling in open models
• find an open alternative to OpenAI o1
• study chain-of-thought activation data for reasoning

When to choose

• you want open weights approximating o1-style reasoning
• you need CoT SFT data to fine-tune LLaMA/Qwen models
• you want to research test-time scaling and long reasoning in small models

When to avoid

• you need production-grade o1-level performance
• you want a ready-made inference API rather than models to self-host
• you need a fully mature, actively maintained training framework

Facets

dataset · maturity active

llm-training machine-learning data-generation large-language-models deep-learning machine-learning artificial-intelligence python cloud open-source-model chain-of-thought sft-data llama qwen reasoning test-time-scaling huggingface gpu

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markdown · JSON · MCP: product_card(name="Open-Source-O1/Open-O1")