Our token counts matched MISSINGNO. to the tokenizer family behind Beam on all 24 phrases, five days before Reflection named it.
Independent benchmark card by Stealth Models: our test results and findings for this model.
StealthMark results for the released Beam 1.0:
Open each result · Visual Intelligence: Beach 52.4 · Raccoon 46.3 · Selfie 45.4 · Mona Lisa 0.7
General Intelligence: Foresight 49.4 · Latch 37.3 · Ground Truth 27.9 · Newton's Mirror 21.7
All results and comparisons on stealthmodels.com ↗
Sources: Reflection's Beam launch post · our token-count test
Facts as text
| Fact | Value |
|---|---|
| First seen | 10 Oct 2026 |
| Revealed | 16 Oct 2026 |
| Developer | Reflection AI |
| Context | 262,144 tokens |
| Input | Text |
| Tool calls | Yes, including parallel calls |
| Speed in our tests | about 846 tok/s |
| Access | Preview ended; the released Beam is available |
Run it
Official weights of the released Beam reflection/Beam-1.0-501B-A23B · license: Apache 2.0, read it · GGUF: Unsloth · Local: 501B parameters, 23B active; this needs a large multi-GPU server.
Model guide · StealthMark · Play the benchmarks · Follow for new reveals
This card and its images: CC BY 4.0, credit stealthmodels.com. The model's weights have their own license. Updated 28 October 2026.