Python Bindings support for Python 3.14

[skhasibulalam]

Intro

Hi!
I am a graduate student, and I've been using MuJoCo for my research with reinforcement learning.

My setup

Python: 3.14.2
MuJoCo: 3.4.0 (PyPI)
OS: RHEL 8.10; also tried on Windows 11

My question

I'm trying to install MuJoCo via pip install mujoco
But during the installation on, it throws this error:

RuntimeError: MUJOCO_PATH environment variable is not set.
note: This error originates from a subprocess, and is likely not a problem with pip.

This error only appears if I use Python 3.14.x. But for Python 3.13.x, pip install mujoco works fine.
Is there an estimated timeline for the availability of wheels for Python 3.14.x?
Thank you.

Minimal model and/or code that explain my question

No response

Confirmations

• I searched the latest documentation thoroughly before posting.
• I searched previous Issues and Discussions, I am certain this has not been raised before.

[reneleonhardt]

Interestingly, the bindings advertise Python 3.9 (EOL) to 3.12 support, but 2 weeks ago wheels for 3.10 to 3.13 (without free-threading) have been released:
https://pypi.org/project/mujoco/3.4.0/#files

Can the build be synchronized with the actual Python support range, hopefully including 3.14?

[AdarshCodes1221]

This is expected behavior with Python 3.14.

Currently, MuJoCo does not provide prebuilt wheels for Python 3.14.
When using Python 3.14, pip falls back to building from source, which
requires MUJOCO_PATH to be set, hence the error.

For Python 3.13 and below, wheels are available, so installation works
without needing MUJOCO_PATH.

Recommended workaround:

• Use Python 3.13 (or lower) for now
• Install MuJoCo normally via pip

Example:
pyenv install 3.13.2
pyenv global 3.13.2
pip install mujoco

Regarding timeline:
There is no announced release date yet for Python 3.14 wheels.
Support typically follows once Python 3.14 stabilizes and upstream
dependencies are updated.

So for now, sticking with Python 3.13 is the safest option.