Reflection AI is a Frontier Foundation Labs company founded in 2024 and based in Brooklyn, United States. It has raised $2B in total funding, most recently a Series B in 2025 at a $8B valuation.
| Date | Stage | Amount | Valuation | Lead investors |
|---|---|---|---|---|
| Oct 9, 2025 | Series B | $2B | $8B | Nvidia, Lightspeed Venture Partners |

Built In profiles Reflection AI, covering its company background, model lineup and open-weight strategy.

Meta releases open weights for Muse Spark Open, now the strongest American open model, as Reflection's Beam and Mistral Large 4 also land.
Reflection AI launches Beam, a 501B-parameter open-weight MoE model trained from scratch on 23.8T tokens.
An autonomous coding and software-engineering agent introduced in July 2025, built as a collection of cooperating agents that retrieve and synthesize information from codebases and organizational knowledge to answer questions and complete development tasks.