Releasing this under the Apache license is a shot at competitors that want to license their models on Open Router and enterprise.
It eliminates any reason to use an inferior Meta or Chinese model that costs money to license, thus there are no funds for these competitors to build a GPT 5 competitor.
There are lots more applications than coding and Open Router hosting for open weight models that I'd guess just got completely changed by this being an Apache license. Think about products like DataBricks that allow enterprise to use LLMs for whatever purpose.
I also suspect the new OpenAI model is pretty good at coding if it's like o4-mini, but admittedly haven't tried it yet.
It eliminates any reason to use an inferior Meta or Chinese model that costs money to license, thus there are no funds for these competitors to build a GPT 5 competitor.