Reflection AI, a Brooklyn-based company founded in 2024, builds open-weight frontier models for coding, reasoning and agents. It raised $2 billion in October 2025 and released the weights for Beam, a 501 billion parameter mixture-of-experts model, under an Apache 2.0 licence in October 2026.
At a glance
| Price from | Free (open weights) |
| Best for | Developers who want a US-built open model under a permissive licence |
From Reflection AI's own website.
What stands out
- Permissive open licence
- Very well funded
Worth knowing
- First model only just released
- Short track record
How it ranks
Reflection AI is ranked 5th of 10 in Best Open-Source AI Startups (Lister Score 92.2).
#5 in Best Open-Source AI Startups · Lister Score 92.2
Reflection published Beam's weights on Hugging Face under Apache 2.0 on 16 October 2026..
| Rank | Best Open-Source AI Startups | Score |
|---|---|---|
| 1 | Mistral AI | 97.3 |
| 2 | Moonshot AI | 96.0 |
| 3 | Together AI | 94.8 |
| 4 | Black Forest Labs | 93.5 |
| 5 | Reflection AI | 92.2 |
| 6 | Ollama | 90.9 |
| 7 | LangChain | 89.6 |
| 8 | Inferact | 88.3 |
| 9 | Nous Research | 87.0 |
| 10 | Stability AI | 85.7 |
Frequently asked questions
How does Reflection AI rank on Lister?
Reflection AI is ranked 5th of 10 in Best Open-Source AI Startups (Lister Score 92.2).
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