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Allen Institute for AI (Ai2)•November 20, 2025

Olmo-3.1 32B Think

Open Source
open-source
llm
reasoning
ai2

Explore Olmo-3.1 32B Think

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### TL;DR

Olmo-3.1 32B Think is a high-performance 32-billion-parameter language model specialized for complex reasoning, multi-step logic, and advanced chain-of-thought processing. As an open-science model, it provides full transparency into its training data, code, and methodology, making it a powerful resource for researchers and developers in fields like mathematics and programming.

Key Insights & Metrics

Pricing
Free
Cost structure
Version
3.1
Current release version
Hardware
Roughly 64GB to 80GB of VRAM (such as an A100 80GB or multiple 24GB consumer GPUs)
Compute requirements
Category
Open Source
Licensing model
Region
United States
Primary region

Key Features

  • Advanced chain-of-thought reasoning with verifiable internal steps
  • 64,536 token context window for long-horizon tasks
  • Optimized performance for mathematics, coding, and instruction-following
  • Full transparency regarding training data (Dolma 3) and model checkpoints
  • Apache 2.0 licensed for research and educational use

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