shaffhausenquant/OpenThinker-7B

TEXT GENERATIONPricing:Input $0.4 / Cached $0.08 / Output $0.8Concurrent Unit Cost:1Model Size:7.6BQuant:FP8Context Size:32kTool Calling:SupportedPublished:Aug 11, 2026License:apache-2.0Architecture:Transformer Open Weights Featherless Exclusive Cold

OpenThinker-7B by shaffhausenquant is a 7.6 billion parameter language model, fine-tuned from Qwen/Qwen2.5-7B-Instruct on the OpenThoughts-114k dataset. This model is specifically optimized for reasoning tasks, demonstrating improved performance over its base model and Bespoke-Stratos-7B on benchmarks like AIME24, MATH500, and GPQA-Diamond. It is designed for applications requiring advanced problem-solving and analytical capabilities.

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OpenThinker-7B: Enhanced Reasoning Model

OpenThinker-7B is a 7.6 billion parameter language model developed by shaffhausenquant, built upon the robust Qwen2.5-7B-Instruct architecture. Its primary distinction lies in its fine-tuning on the extensive OpenThoughts-114k dataset, which was distilled from DeepSeek-R1, focusing on complex reasoning examples.

Key Capabilities & Performance

This model demonstrates significant improvements in reasoning benchmarks compared to its predecessor, Bespoke-Stratos-7B, and the base Qwen model. Key performance highlights include:

  • AIME24: Achieves 31.3, outperforming Bespoke-Stratos-7B (22.7).
  • MATH500: Scores 83.0, an improvement over Bespoke-Stratos-7B (79.6).
  • GPQA-Diamond: Reaches 42.4, surpassing Bespoke-Stratos-7B (38.9).
  • LCBv2: Shows enhanced performance across easy, medium, and hard categories, with an overall score of 39.9.

Training and Open-Source Commitment

OpenThinker-7B was trained for 20 hours using four 8xH100 nodes, utilizing specific hyperparameters including a learning rate of 1e-05 and a total batch size of 96. The project emphasizes full transparency and open-source availability, with its model weights, datasets, data generation code, evaluation code (Evalchemy), and training code all publicly accessible. This commitment allows for community inspection and further development.

Good for:

  • Advanced Reasoning Tasks: Excels in mathematical problem-solving, scientific reasoning, and complex question answering.
  • Research and Development: Provides a strong open-source foundation for exploring and building upon reasoning-focused LLMs.
  • Benchmarking: Useful for evaluating and comparing performance on challenging reasoning datasets.