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Add card (28 Oct 2026)

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+ ---
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+ pipeline_tag: text-generation
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+ license: cc-by-4.0
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+ tags:
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+ - missingno
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+ - beam
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+ - stealth-model
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+ - stealthmark
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+ - coding
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+ - reasoning
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+ - tool-use
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+ thumbnail: https://stealthmodels.com/missingno/assets/social-card.png
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+ new_version: reflection/Beam-1.0-501B-A23B
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+ ---
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+
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+ <table>
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+ <tr>
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+ <td width="65%" valign="middle">
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+ <h1>MISSINGNO.</h1>
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+ <p><em>A perfect disguise.</em></p>
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+ <p><strong>Revealed as a preview of Reflection's Beam.</strong></p>
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+ <p>MISSINGNO. answered at about 846 tokens per second in our tests, a coding preview with tool calling that Reflection named as Beam on 16 October.</p>
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+ <p><a href="https://stealthmodels.com/missingno/"><strong>Meet MISSINGNO. ↗</strong></a></p>
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+ </td>
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+ <td width="35%" align="center" valign="middle">
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+ <a href="https://stealthmodels.com/missingno/">
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+ <img src="https://stealthmodels.com/missingno/assets/social-card.png" width="260" alt="MISSINGNO., the purple mystery jelly in a fake moustache.">
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+ </a>
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+ </td>
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+ </tr>
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+ </table>
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+
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+ > Independent benchmark card by [Stealth Models](https://stealthmodels.com/): our test results and findings for this model.
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+
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+ ## Facts
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+ | First seen | Revealed | Developer | Context | Input | Tool calls | Speed in our tests | Access |
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+ |---|---|---|---|---|---|---|---|
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+ | 10 Oct 2026 | 16 Oct 2026 | Reflection AI | 262,144 tokens | Text | Yes, including parallel calls | about 846 tok/s | Preview ended; the released Beam is available |
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+
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+ ## StealthMark results
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+ StealthMark results for the released Beam 1.0:
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+
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+ | Model | Benchmark score | General Intelligence | Visual Intelligence |
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+ |---|---|---|---|
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+ | Beam 1.0 501B A23B (released) | 31.9 | 30.9 | 33.8 |
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+
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+ Beam's highest result is Foresight, which tests anticipating threats and planning ahead: 49.4 out of 100.
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+ StealthMark 1.8.8, results read 28 October 2026. [Beam's full results](https://stealthmodels.com/benchmarks/models/beam-1.0-501b-a23b) · [On the map](https://stealthmodels.com/benchmarks/map)
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+
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+ <img src="https://stealthmodels.com/benchmarks/media/6dea244dd66e5ac6.png" width="360" alt="The released Beam's Beach result, scored at 52.4 out of 100.">
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+
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+ ## How it was revealed
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+ - **16 Oct 2026:** Reflection's [Beam launch post](https://reflection.ai/blog/beam-is-available) credits a MissingNo demo to Beam, released that day as Beam 1.0 with open weights.
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+ - **15 Oct 2026:** The preview Cat Jam matched the same 24 counts in our test; Reflection names it as a Beam preview too. [Cat Jam guide](https://stealthmodels.com/cat-jam/).
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+ - **11 Oct 2026:** Our token-count test matched MISSINGNO. on all 24 phrases to the tokenizer family that Beam turned out to use, five days before Reflection named it. [Details on the model guide](https://stealthmodels.com/missingno/).
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+
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+ ## Run it
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+ Official weights of the released Beam [reflection/Beam-1.0-501B-A23B](https://huggingface.co/reflection/Beam-1.0-501B-A23B) · license: Apache 2.0, [read it](https://huggingface.co/reflection/Beam-1.0-501B-A23B/blob/main/LICENSE) · GGUF: [Unsloth](https://huggingface.co/unsloth/Beam-1.0-501B-A23B-GGUF) · Local: 501B parameters, 23B active; this needs a large multi-GPU server.
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+
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+ ---
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+ [Model guide](https://stealthmodels.com/missingno/) · [StealthMark](https://stealthmodels.com/stealthmark) · [Play the benchmarks](https://stealthmodels.com/play) · [Follow for new reveals](https://huggingface.co/stealth-model)
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+ This card and its images: CC BY 4.0, credit stealthmodels.com. The model's weights have their own license. Updated 28 October 2026.