Gymnasium vs 
Isaac Lab
Gymnasium vs Isaac Lab compared for 2026 — features, license, ease of use, performance and which one to choose. The standard interface for reinforcement learning vs Massively parallel robot training on NVIDIA GPUs.
Updated regularly · curated by OpenSourceAI.tech
Gymnasium vs Isaac Lab at a glance
| Spec | Gymnasium | Isaac Lab |
|---|---|---|
| Category | Robotics & embodied AI | Robotics & embodied AI |
| Type | RL environment API | GPU simulation framework |
| License | MIT | BSD-3-Clause |
| Runs locally | Yes | Yes |
| Primary language | Python | Python |
| Ease of use | Beginner | Advanced |
| Best for | learning RL, or benchmarking an algorithm against a known baseline | teams with NVIDIA GPUs training locomotion or manipulation at scale |
| GitHub stars | 12.2k | 7.7k |
How Gymnasium and Isaac Lab score
| Criterion | Gymnasium | Isaac Lab |
|---|---|---|
| Popularity | 3.0 | 2.5 |
| Maintenance | 5.0 | 5.0 |
| Ease of use | 5.0 | 2.5 |
| Privacy | 5.0 | 5.0 |
| License freedom | 5.0 | 5.0 |
Scores are computed automatically from public signals — GitHub stars (popularity), recent commit activity (maintenance), license type (freedom), local-first design (privacy) and onboarding complexity (ease of use). Indicative, not a verdict.
What each one is
Gymnasium
Gymnasium is the maintained successor to OpenAI Gym: one API that every RL algorithm and environment speaks.
- The interface the whole RL ecosystem implements
- Dozens of environments included
- Actively maintained, unlike the original Gym
Isaac Lab
Isaac Lab runs thousands of simulated robots in parallel on a single GPU, cutting reinforcement-learning training from days to minutes.
- Thousands of parallel environments on one GPU
- Photorealistic sensors for perception training
- Direct path from simulation to real hardware
Key differences
Gymnasium is rL environment API, while Isaac Lab is gPU simulation framework. Their licenses differ (MIT vs BSD-3-Clause), which matters if you ship a commercial product. Gymnasium leans more beginner-friendly, whereas Isaac Lab is more suited to advanced users. In short, Gymnasium fits learning RL, or benchmarking an algorithm against a known baseline, and Isaac Lab fits teams with NVIDIA GPUs training locomotion or manipulation at scale.
Which should you choose?
Choose Gymnasium for learning RL, or benchmarking an algorithm against a known baseline. Choose Isaac Lab for teams with NVIDIA GPUs training locomotion or manipulation at scale.
There is rarely one winner — many setups use both. The right pick depends on your hardware, your team's skills, and whether you value simplicity or control.
Frequently asked questions
Is Gymnasium or Isaac Lab easier to use?
Gymnasium is generally the easier of the two to get started with, while Isaac Lab rewards more setup with more control.
Are Gymnasium and Isaac Lab free?
Gymnasium is free and open source (MIT), and Isaac Lab is free and open source (BSD-3-Clause). Neither charges for the core software.
Can I run Gymnasium and Isaac Lab locally?
Gymnasium: yes · Isaac Lab: yes. Both can be used without sending your data to a third-party cloud where their setup allows.
Gymnasium vs Isaac Lab — which should I pick in 2026?
Choose Gymnasium for learning RL, or benchmarking an algorithm against a known baseline. Choose Isaac Lab for teams with NVIDIA GPUs training locomotion or manipulation at scale.
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