Have you tried Groq? We did a few days testing on replacing gpt4-turbo with it and, while incredibly fast, the results were horrible, even after a lot of specific prompt engineering. So many hallucinations and such. Our products all have to do with strict generation and software quality; it basically has to fill in the blanks but it was incredibly hit or miss. Some results came in within a second so even a few iterations beat gpt4 when correct, but some needed so many (that we quit) iterations that gpt4 beat it hands down.