Our reasoning study pointed to Qwen two days before Callstack revealed Pixel Canary as Apex, a Qwen-based coding model built for React Native.
By Stealth Models.
Compare it with the Qwen 3.8 family
Facts as text
| Fact | Value |
|---|---|
| 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 |
| Access | Active as a hosted API |
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Callstack serves Apex as a hosted model, so there are no weights to download.
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Text and images: CC BY 4.0, stealthmodels.com.
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