OLMo
Fully open language models with open data and training code.
Full OLMo record →Head to head
OLMo vs ChatGPT
OLMo (Allen Institute for AI) and ChatGPT (OpenAI) both sit in Writing. ChatGPT shipped more tracked changes in the last 30 days (12 vs 0). Every value below comes from the latest crawl of the vendors' own pages.
| Attribute | OLMo Allen Institute for AI | ChatGPT OpenAI |
|---|---|---|
| Segment | Writing | Writing |
| Version | OLMo 3 | GPT-6 Astra |
| Entry cost | Open weights, free | Pricing not published in the provided documentation |
| Pricing tiers | — | Free Tier free |
| Model stack | OLMo 3 | GPT Image · GPT-5.2 · GPT-5.2 Thinking · GPT-5.4 · gpt-5.6 · gpt-6-astra |
| Context window | — | 196K tokens on Plus |
| Public API | ||
| Routes models | ||
| Changes / 30d | 0 | 12 |
| Origin | Global | Global |
| Capabilities | Open data, Open checkpoints, Full recipe | Voice mode, Deep research, Canvas, Agent mode, Projects, Connectors, Realtime API, Voice agents |
ChatGPT
The most widely used consumer AI assistant, spanning writing, analysis, images and voice.
Full ChatGPT record →