I didn't say that I thought they would likely extend it, but I stand by my statement that it's a possibility.

Neither company have expressed that the six month thing is a hard limit.

The fact that OpenAI shipped their version within two weeks of Anthropic's announcement suggests to me that they're competing with each other for credibility with the open source community.

(Obviously if you make decisions based on the assumption that the program will be expanded later you're not acting rationally.)