The advice I've always been given in (admittedly: small) business startup sessions was "focus on quality rather than price because someone will always undercut you on price".

The models are in a constant race on both price and quality, but right now they're so cheap that paying for the best makes sense for any "creative" task (like writing software, even if only to reduce the number of bugs the human code reviewer needs to fix), while price sensitivity only matters for the grunt work classification tasks (such as "based on comments, what is the public response to this policy?")