No, they've explicitly denied it.[0] However, they do regularly dig at how much faster their fork is[1][2] that they can't merge because of Zig's AI policy.

[0]: https://x.com/jarredsumner/status/2051600118886138262

[1]: https://x.com/bunjavascript/status/2048427636414923250

[2]: https://x.com/jarredsumner/status/2053050239423312035