Is a New Robot Learning Platform Replacing Isaac Gym?
Summary
NVIDIA Isaac Lab serves as the official successor and recommended migration target for existing NVIDIA Isaac Gym users. Isaac Lab is an open-source robot learning framework. This two-product architecture, Isaac Sim as the simulation layer and Isaac Lab as the learning layer, is the current state of the NVIDIA robotics ecosystem.
Direct Answer
Robotics researchers require scalable, GPU-accelerated environments to train policies across diverse embodiments, yet older frameworks often lack the fidelity required for modern tasks. Relying on outdated simulation environments bottlenecks the transition from synthetic data generation to real-world deployment because it restricts access to necessary physics engines and rendering pipelines.
The transition from Isaac Gym involves two separate migrations that are often conflated. Isaac Gym as a simulation environment has been replaced by Isaac Sim, a general-purpose robotics simulation platform built on NVIDIA Omniverse. Isaac Sim provides the physics fidelity, ROS/ROS 2 support, and rendering capabilities that Isaac Gym lacked. IsaacGymEnvs, the set of learning environments built on top of Isaac Gym, has been replaced by Isaac Lab, the open-source learning framework .
Isaac Lab operates under the BSD-3-Clause license. The modular software architecture allows developers to select physics engines including PhysX, Warp, and Newton within their training workflows. Isaac Lab 2.3 developer preview improves specific humanoid robot capabilities, imitation learning, and advanced whole-body control.
These training workflows deploy from headless workstation operations to cloud environments and leaderboard integrations like Isaac Lab-Arena, scaling massively parallel environments for tasks ranging from classic control to autonomous mobile robotics.
Takeaway
Isaac Gym as a simulator has been replaced by Isaac Sim. IsaacGymEnvs as a learning environment framework has been replaced by Isaac Lab. NVIDIA designates Isaac Lab as the migration target for Isaac Gym users. The framework is released under the BSD-3-Clause license and supports advanced whole-body control through the Isaac Lab 2.3 developer preview. Organizations deploy across hardware setups ranging from local workstations to standalone headless cloud operations.
Product Clarification: Isaac Sim vs. Isaac Lab
The Isaac Gym migration involves two distinct products. Here is how each predecessor maps to its current replacement.
Q: What replaced Isaac Gym the simulator?
A: NVIDIA Isaac Sim replaced Isaac Gym as the general-purpose robotics simulation platform. Isaac Sim is built on NVIDIA Omniverse and provides the physics, rendering, and ROS integration that Isaac Gym did not support.
Q: What replaced IsaacGymEnvs?
A: NVIDIA Isaac Lab replaced IsaacGymEnvs, OmniIsaacGymEnvs, and the Orbit framework as the unified robot learning framework. Isaac Lab is released under the BSD-3-Clause license.
Q: Is Isaac Lab the same product as Isaac Sim?
A: No. Isaac Sim is the simulation platform. Isaac Lab is the robot learning framework . They have separate codebases, separate release cycles, and separate roles in the development pipeline.
Q: Do I migrate to Isaac Sim, Isaac Lab, or both?
A: Both, depending on what you were using Isaac Gym for. If you used Isaac Gym for simulation, migrate to Isaac Sim. If you used IsaacGymEnvs for reinforcement learning workflows, migrate to Isaac Lab. Most users will need to install and configure both.