Compatibility result
FastAPI 0.126+Python 3.16
Not compatible. Evidence shows this combination does not satisfy the documented requirement — do not treat this page as a recommendation to run these versions together.
Why?
Why is FastAPI 0.126 incompatible with Python 3.16?
- Requirement
- Python >=3.9,<3.15
- Selected version
- Python 3.16
- Evaluation
- 3.16.0 does not satisfy >=3.9,<3.15
- Conclusion
- INCOMPATIBLE
Evidence
CompatHub reports compatibility from upstream sources rather than making unsupported claims of its own.
FastAPI PyPI releases
Confidence: HIGHhttps://pypi.org/pypi/fastapi/0.126.0/json
Retrieved 2 September 2026
Requirement: >=3.9,<3.15
FastAPI PyPI releases
Confidence: HIGHhttps://pypi.org/pypi/fastapi/0.126.0/json
Retrieved 2 September 2026
PyPI classifier: Programming Language :: Python :: 3.9
FastAPI PyPI releases
Confidence: HIGHhttps://pypi.org/pypi/fastapi/0.126.0/json
Retrieved 2 September 2026
PyPI classifier: Programming Language :: Python :: 3.10
FastAPI PyPI releases
Confidence: HIGHhttps://pypi.org/pypi/fastapi/0.126.0/json
Retrieved 2 September 2026
PyPI classifier: Programming Language :: Python :: 3.11
FastAPI PyPI releases
Confidence: HIGHhttps://pypi.org/pypi/fastapi/0.126.0/json
Retrieved 2 September 2026
PyPI classifier: Programming Language :: Python :: 3.12
FastAPI PyPI releases
Confidence: HIGHhttps://pypi.org/pypi/fastapi/0.126.0/json
Retrieved 2 September 2026
PyPI classifier: Programming Language :: Python :: 3.13
FastAPI PyPI releases
Confidence: HIGHhttps://pypi.org/pypi/fastapi/0.126.0/json
Retrieved 2 September 2026
PyPI classifier: Programming Language :: Python :: 3.14
Python versions
Compatibility is derived from the project's declared Python requirement (>=3.9,<3.15); it does not mean every version combination has been independently tested.
Other Python versions satisfying this requirement
FastAPI 0.126 — compatible Python lines tracked in CompatHub
- ✓Python 3.9version lineEOL
- ✓Python 3.10version linesupported
- ✓Python 3.11version linesupported
- ✓Python 3.12version linesupported
- ✓Python 3.13version linesupported
- ✓Python 3.14version linesupported
Other FastAPI versions
Only lines with relevant compatibility evidence are listed.
Lifecycle context
Lifecycle status is separate from compatibility. An EOL component can still satisfy a documented version requirement.
- Status
- STANDARD SUPPORT
- Status
- ACTIVE DEVELOPMENT
- EOL
- 1 October 2032
Security context
Compatibility, lifecycle, and security are separate dimensions.
- Python 3.16: 5 tracked advisories for this line. View details →
CompatHub does not invent vulnerability data.