This may be because they recently found ways to make GPT3.5 much more efficient. https://openai.com/blog/introducing-chatgpt-and-whisper-apis https://openai.co

This may be because they recently found ways to make GPT3.5 much more efficient. https://openai.com/blog/introducing-chatgpt-and-whisper-apis https://openai.com/blog/introducing-chatgpt-and-whisper-apis