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Studio-level card: key art, verdict, results and case-file panels (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.
 
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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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+ <a href="https://stealthmodels.com/missingno/?utm_source=huggingface&utm_medium=referral&utm_campaign=missingno-card"><img src="https://huggingface.co/stealth-model/missingno/resolve/main/panels/hero.webp" alt="MISSINGNO., the purple mystery jelly in a fake moustache, at a Nous Portal checkpoint."></a>
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+
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+ **Our token counts matched MISSINGNO. to the tokenizer family behind Beam on all 24 phrases, five days before Reflection named it.**
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+
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+ *Independent benchmark card by [Stealth Models](https://stealthmodels.com/?utm_source=huggingface&utm_medium=referral&utm_campaign=missingno-card): our test results and findings for this model.*
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+
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+ StealthMark results for the released Beam 1.0:
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+
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+ <a href="https://stealthmodels.com/benchmarks/models/beam-1.0-501b-a23b?utm_source=huggingface&utm_medium=referral&utm_campaign=missingno-card"><img src="https://huggingface.co/stealth-model/missingno/resolve/main/panels/verdict.webp" alt="StealthMark 1.8.8 results for the released Beam 1.0: benchmark score 31.9 out of 100, General Intelligence 30.9, Visual Intelligence 33.8. Beam, the model behind MISSINGNO., is strongest at composing a whole scene: 52.4 on Beach."></a>
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+
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+ <a href="https://stealthmodels.com/benchmarks/models/beam-1.0-501b-a23b?utm_source=huggingface&utm_medium=referral&utm_campaign=missingno-card"><img src="https://huggingface.co/stealth-model/missingno/resolve/main/panels/results.webp" alt="Every StealthMark result of the released Beam 1.0: Beach 52.4, Foresight 49.4, Raccoon 46.3, Selfie 45.4, Latch 37.3, Ground Truth 27.9, Newton's Mirror 21.7, Mona Lisa 0.7."></a>
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+
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+ **Open each result** · Visual Intelligence: [Beach&nbsp;52.4](https://stealthmodels.com/benchmarks/models/beam-1.0-501b-a23b/beach?utm_source=huggingface&utm_medium=referral&utm_campaign=missingno-card) · [Raccoon&nbsp;46.3](https://stealthmodels.com/benchmarks/models/beam-1.0-501b-a23b/raccoon?utm_source=huggingface&utm_medium=referral&utm_campaign=missingno-card) · [Selfie&nbsp;45.4](https://stealthmodels.com/benchmarks/models/beam-1.0-501b-a23b/selfie?utm_source=huggingface&utm_medium=referral&utm_campaign=missingno-card) · [Mona&nbsp;Lisa&nbsp;0.7](https://stealthmodels.com/benchmarks/models/beam-1.0-501b-a23b/mona-lisa?utm_source=huggingface&utm_medium=referral&utm_campaign=missingno-card)<br>
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+ General Intelligence: [Foresight&nbsp;49.4](https://stealthmodels.com/benchmarks/models/beam-1.0-501b-a23b?utm_source=huggingface&utm_medium=referral&utm_campaign=missingno-card#game-foresight-self-improvement) · [Latch&nbsp;37.3](https://stealthmodels.com/benchmarks/models/beam-1.0-501b-a23b?utm_source=huggingface&utm_medium=referral&utm_campaign=missingno-card#game-latch-five-levels) · [Ground&nbsp;Truth&nbsp;27.9](https://stealthmodels.com/benchmarks/models/beam-1.0-501b-a23b/ground-truth?utm_source=huggingface&utm_medium=referral&utm_campaign=missingno-card) · [Newton's&nbsp;Mirror&nbsp;21.7](https://stealthmodels.com/benchmarks/models/beam-1.0-501b-a23b/newtons-mirror?utm_source=huggingface&utm_medium=referral&utm_campaign=missingno-card)
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+
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+ **[All results and comparisons on stealthmodels.com ↗](https://stealthmodels.com/benchmarks/models/beam-1.0-501b-a23b?utm_source=huggingface&utm_medium=referral&utm_campaign=missingno-card)**
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+
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+ <a href="https://stealthmodels.com/missingno/?utm_source=huggingface&utm_medium=referral&utm_campaign=missingno-card"><img src="https://huggingface.co/stealth-model/missingno/resolve/main/panels/case.webp" alt="The case file. 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. 11 Oct 2026, our finding: Our token-count test matches all 24 phrases to the tokenizer family Beam turned out to use. 15 Oct 2026, our finding: The Cat Jam preview matches the same 24 counts in our test. 16 Oct 2026: Reflection releases Beam 1.0 with open weights and credits the MissingNo demo to it."></a>
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+
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+ Sources: [Reflection's Beam launch post](https://reflection.ai/blog/beam-is-available) · [our token-count test](https://stealthmodels.com/missingno/?utm_source=huggingface&utm_medium=referral&utm_campaign=missingno-card)
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+
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+ <details><summary>Facts as text</summary>
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+
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+ | Fact | Value |
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+ |---|---|
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+ | First seen | 10 Oct 2026 |
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+ | Revealed | 16 Oct 2026 |
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+ | Developer | Reflection AI |
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+ | Context | 262,144 tokens |
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+ | Input | Text |
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+ | Tool calls | Yes, including parallel calls |
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+ | Speed in our tests | about 846 tok/s |
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+ | Access | Preview ended; the released Beam is available |
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+
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+ </details>
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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/?utm_source=huggingface&utm_medium=referral&utm_campaign=missingno-card) · [StealthMark](https://stealthmodels.com/stealthmark?utm_source=huggingface&utm_medium=referral&utm_campaign=missingno-card) · [Play the benchmarks](https://stealthmodels.com/play?utm_source=huggingface&utm_medium=referral&utm_campaign=missingno-card) · [Follow for new reveals](https://huggingface.co/stealth-model)<br>
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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.
 
 
 
 
 
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