Support Gradio ≥5.27.0 by updating FastAPI and Typer dependency bounds

[nok]

Search before asking

• I have searched the Inference issues and found no similar bug report.

Bug

When trying to add both inference and a modern version of gradio (≥5.27.0) into the same project, pip (via uv) is unable to resolve the dependency graph due to incompatible pins on FastAPI and Typer:

• inference (all released versions) pins:

  • typer==0.9.0
  • fastapi>=0.100,<0.111

• gradio≥5.27.0 pins:

  • fastapi>=0.115.2
  • typer>=0.12

Because there is no overlap in acceptable versions of FastAPI or Typer, it’s currently impossible to install both in the same environment. The version 5.27.0 of gradio added the neat feature ImageSlider to compare differences between images. The latest version of gradio is 5.35.0.

Environment

• Python: 3.9 (resolution also failed for higher Python versions e.g. 3.10–3.13)
• inference: any version (0.9.18 → 0.51.1)
• gradio: ≥5.27.0

Minimal Reproducible Example

uv init --bare --python 3.9
uv add inference "gradio>=5.27.0" --prerelease=allow

You'll see an error similar to:

... Because inference>=0.9.18 depends on typer==0.9.0, and gradio>=5.27.0 depends on typer>=0.12:
  inference>=0.9.18 and typer>=0.12 are incompatible.
... Because inference>=0.10.0 depends on fastapi<0.111, and gradio>=5.27.0 depends on fastapi>=0.115.2:
  inference>=0.10.0 and fastapi>=0.115.2 are incompatible.
...
Your project's requirements are unsatisfiable.

Additional

Thank you for your work on inference. I'm looking forward to a resolution so we can build neat Gradio demos on Hugging Face! 😄

Are you willing to submit a PR?

• Yes I'd like to help by submitting a PR!

[grzegorz-roboflow]

Hi @nok,

Thank you for submitting this issue, and also thank you for running preliminary research on this issue!

I am testing relaxing fastapi and typer dependencies in #1407, but I also realized you can install gradio alongisde inference:

mkdir /tmp/tst
cd /tmp/tst
echo gradio > requirements.txt
echo inference >> requirements.txt
python3.11 -m venv venv
source venv/bin/activate
pip install -r requirements.txt
deactivate
cd ~
rm -rf /tmp/tst

we list typer in requirements for inference-cli, so:

mkdir /tmp/tst
cd /tmp/tst
echo gradio > requirements.txt
echo inference-cli >> requirements.txt
python3.11 -m venv venv
source venv/bin/activate
pip install -r requirements.txt
deactivate
cd ~
rm -rf /tmp/tst

however this does not fail neither

[grzegorz-roboflow]

Hi @nok , in v0.51.3 we relaxed typer and fastapi dependencies, please reopen this issue if the problem you encountered still persists. Thanks!