Smallest fully open OLMo 2 model, trained on 4T tokens.
Released
May 1, 2025
Context window
4.1K tokens
Max output
Not disclosed
Parameters
1.5B
Input price
Not disclosed
Output price
Not disclosed
Prices are first-party list prices in USD at the standard tier. Last verified Oct 30, 2026.
Pricing
No first-party API. This is an open-weights release you can run yourself.
Specifications
- Developer
- Allen Institute for AI
- Model type
- Text LLM
- Architecture
- Dense
- Parameters
- 1.5B
- Input
- Text
- Output
- Text
- Knowledge cutoff
- Not disclosed
- License
- Apache License 2.0
- API access
- No first-party API
- Capabilities
- Small LM