Peaked at #1 Now #1
Reflection Releases Beam Open Weights
Reflection releases Beam with Apache 2.0 open weights and 40+ partners, including weights, tokenizer, reference implementation and the Mirror CLI.
Key points
- Reflection AI released Beam with open weights under the Apache 2.0 license, in collaboration with 40+ partners.
- The release includes weights, tokenizer, a reference implementation, BF16, FP8 and NVFP4 weights, a DFlash2 drafter, and the Mirror CLI harness.
- Arena reports Beam-1.0-501B-A23B ranked #12 among open weight models in Agent Arena with -3.67% Net Improvement, and #22 among open in Code Arena: WebDev with 1438 pts.
- Arena says Beam 1.0 is the top-ranked US model among open models on the Agent Arena leaderboard, ahead of Hy3, MiMo V2.5 Pro and MiniMax M3, with a margin of error of ±3.84%.
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Reflection AI's open Beam-1.0-501B-A23B ranked #12 among open-weight models in Agent Arena and #22 in Code Arena WebDev, under Apache 2.0.
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Reaction on X: Replies are mostly brief, enthusiastic welcomes to the release, with no substantive questions or corrections. The original poster added a thread reply describing Beam as an "open operating system" built with OSS tools alongside existing developer projects.
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From @reflection_ai, @huggingface, @lmstudio and others. Spam removed, with English and Chinese translations.
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