FastAPI is modern and async, delivering higher performance with auto-generated OpenAPI documentation and strong typing via Pydantic, making API development faster and safer. Flask is lightweight and has a huge ecosystem, making it great for prototypes or when flexibility is key. For fast, stable, and well-documented modern APIs, choose FastAPI. Use Flask for small apps or when deep custom setups are required.
Related FastAPI Questions And Answers
- What is FastAPI used for?
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- FastAPI vs Django: which is better for full-stack Python?
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- What combination of technologies is best to use with FastAPI for an AI/ML API?
- What to avoid combining with FastAPI in early development?
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