Card text in the human style, two targeted links
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README.md
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**Our reasoning study pointed to Qwen two days before Callstack revealed Pixel Canary as Apex, a Qwen-based coding model built for React Native.**
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<a href="https://stealthmodels.com/benchmarks/models/pixel-canary?utm_source=huggingface&utm_medium=referral&utm_campaign=pixel-canary-card"><img src="https://huggingface.co/stealth-model/pixel-canary/resolve/main/panels/verdict.webp" alt="StealthMark 1.8.8 results for Pixel Canary (Callstack Apex): benchmark score 49.5 out of 100, General Intelligence 40.4, Visual Intelligence 59.6. Strongest at characters that interact: 76.8 on Raccoon."></a>
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<a href="https://stealthmodels.com/benchmarks/models/pixel-canary?utm_source=huggingface&utm_medium=referral&utm_campaign=pixel-canary-card"><img src="https://huggingface.co/stealth-model/pixel-canary/resolve/main/panels/results.webp" alt="Every StealthMark result of Pixel Canary (Callstack Apex): Raccoon 76.8, Selfie 74.1, Beach 61.4, Mona Lisa 45.9, Ground Truth 44.1, Newton's Mirror 32.7, Latch 100.0 (partial run, 1 of 5 levels). Not tested yet: Foresight."></a>
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General Intelligence: [Ground Truth 44.1](https://stealthmodels.com/benchmarks/models/pixel-canary/ground-truth?utm_source=huggingface&utm_medium=referral&utm_campaign=pixel-canary-card) 路 [Newton's Mirror 32.7](https://stealthmodels.com/benchmarks/models/pixel-canary/newtons-mirror?utm_source=huggingface&utm_medium=referral&utm_campaign=pixel-canary-card) 路 [Latch 100.0 (1 of 5 levels)](https://stealthmodels.com/benchmarks/models/pixel-canary?utm_source=huggingface&utm_medium=referral&utm_campaign=pixel-canary-card#game-latch-five-levels)
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**[All results and comparisons on stealthmodels.com 鈫梋(https://stealthmodels.com/benchmarks/models/pixel-canary?utm_source=huggingface&utm_medium=referral&utm_campaign=pixel-canary-card)**
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<a href="https://stealthmodels.com/pixel-canary/?utm_source=huggingface&utm_medium=referral&utm_campaign=pixel-canary-card"><img src="https://huggingface.co/stealth-model/pixel-canary/resolve/main/panels/case.webp" alt="The case file. First seen 25 Sep 2026, revealed 1 Oct 2026, developer Callstack (Poland), context 262,144 tokens, input Text, tool calls unknown, speed in our tests about 255 tok/s. 26 Sep 2026: A tokenizer study by AI鏅傜煭銉┿儨 links its vocabulary to Qwen. 29 Sep 2026, our finding: Our reasoning study puts Qwen3.8-Flash closest, two days before the reveal. 1 Oct 2026: Callstack reveals Apex: a Qwen foundation with React Native post-training."></a>
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<details><summary>Facts as text</summary>
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@@ -46,8 +43,8 @@ Sources: [Callstack's announcement](https://www.callstack.com/blog/apex-agetic-c
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</details>
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## Run it
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Callstack serves Apex as a hosted model
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[Model guide](https://stealthmodels.com/pixel-canary/?utm_source=huggingface&utm_medium=referral&utm_campaign=pixel-canary-card) 路 [StealthMark
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**Our reasoning study pointed to Qwen two days before Callstack revealed Pixel Canary as Apex, a Qwen-based coding model built for React Native.**
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By [Stealth Models](https://stealthmodels.com/?utm_source=huggingface&utm_medium=referral&utm_campaign=pixel-canary-card).
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<a href="https://stealthmodels.com/benchmarks/models/pixel-canary?utm_source=huggingface&utm_medium=referral&utm_campaign=pixel-canary-card"><img src="https://huggingface.co/stealth-model/pixel-canary/resolve/main/panels/verdict.webp" alt="StealthMark 1.8.8 results for Pixel Canary (Callstack Apex): benchmark score 49.5 out of 100, General Intelligence 40.4, Visual Intelligence 59.6. Strongest at characters that interact: 76.8 on Raccoon."></a>
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<a href="https://stealthmodels.com/benchmarks/models/pixel-canary?utm_source=huggingface&utm_medium=referral&utm_campaign=pixel-canary-card"><img src="https://huggingface.co/stealth-model/pixel-canary/resolve/main/panels/results.webp" alt="Every StealthMark result of Pixel Canary (Callstack Apex): Raccoon 76.8, Selfie 74.1, Beach 61.4, Mona Lisa 45.9, Ground Truth 44.1, Newton's Mirror 32.7, Latch 100.0 (partial run, 1 of 5 levels). Not tested yet: Foresight."></a>
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[Compare it with the Qwen 3.8 family](https://stealthmodels.com/benchmarks?models=qwen3.8-max-0902,qwen3.8-27b,pixel-canary,qwen3.8-flash,qwen3.6-27b&utm_source=huggingface&utm_medium=referral&utm_campaign=pixel-canary-card)
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<a href="https://stealthmodels.com/pixel-canary/?utm_source=huggingface&utm_medium=referral&utm_campaign=pixel-canary-card"><img src="https://huggingface.co/stealth-model/pixel-canary/resolve/main/panels/case.webp" alt="The case file. First seen 25 Sep 2026, revealed 1 Oct 2026, developer Callstack (Poland), context 262,144 tokens, input Text, tool calls unknown, speed in our tests about 255 tok/s. 26 Sep 2026: A tokenizer study by AI鏅傜煭銉┿儨 links its vocabulary to Qwen. 29 Sep 2026, our finding: Our reasoning study puts Qwen3.8-Flash closest, two days before the reveal. 1 Oct 2026: Callstack reveals Apex: a Qwen foundation with React Native post-training."></a>
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[See our reasoning study](https://stealthmodels.com/pixel-canary?utm_source=huggingface&utm_medium=referral&utm_campaign=pixel-canary-card#reasoning-comparison)
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<details><summary>Facts as text</summary>
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</details>
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## Run it
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Callstack serves Apex as a hosted model, so there are no weights to download.
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[Model guide](https://stealthmodels.com/pixel-canary/?utm_source=huggingface&utm_medium=referral&utm_campaign=pixel-canary-card) 路 [StealthMark leaderboard](https://huggingface.co/spaces/stealth-model/stealthmark) 路 [Follow us](https://huggingface.co/stealth-model)<br>
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Text and images: CC BY 4.0, stealthmodels.com.
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