Updates README: change model to gpt-4o-mini, it is more modern model and affordability#29

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GromNaN merged 1 commit intoopenai-php:mainfrom

princeaden1:update_model

Jul 4, 2025

Commits on Jul 3, 2025

Moves model to 4o-mini as it is cheaper and typically better than 3.5
princeaden1
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