Reflection Beam (501B open-weight model)

US lab Reflection released Beam, its first model, as Apache 2.0 open weights on Hugging Face.

Beam is a text-only mixture-of-experts model with 501B total and 23B active parameters and a 1M-token context, built for coding and agent work. Self-hosting needs data-center GPUs (Hugging Face suggests four B200s for the 4-bit version); hosted inference providers also offer it.

Status

Released

Date

Oct 16, 2026

Maker

Reflection AI

Type

Software

Price

Free weights (Apache 2.0)

Categories

AI

Sources

• Hugging Face blog
• Hugging Face model page

Launch dates can change. Check the sources for the latest. Last reviewed Oct 17, 2026.