Unity ML-Agents
Open-source Unity toolkit for training intelligent agents using reinforcement learning, imitation learning, and curiosity
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What is Unity ML-Agents?
Unity ML-Agents is Open-source Unity toolkit for training intelligent agents using reinforcement learning, imitation learning, and curiosity It's designed for game devs and researchers training agents in unity.
Unity ML-Agents Tutorial
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About Unity ML-Agents
Key Strengths
- Free, open-source toolkit for training game agents with reinforcement learning
- Actively maintained, with releases in 2026 (4.1.0 in July)
- Runs trained models in-engine via Unity's Inference Engine
Limitations to Consider
- Unity briefly labeled it 'deprecated' by mistake, which created confusion
- Requires Python training plus Unity know-how
- RL training is compute- and time-hungry
Best For
Game devs and researchers training agents in Unity.
Skip it if: You want scripted NPC dialogue rather than RL.
Pricing
a completely free service with no subscription required
Free (open source). Unity licensing applies to the editor. (checked Oct 11, 2026)
Sources
- https://github.com/Unity-Technologies/ml-agents/blob/develop/com.unity.ml-agents/CHANGELOG.md
- https://discussions.unity.com/t/is-ml-agents-being-deprecated/1643681/3
Pros, cons and pricing compiled from public sources (official pricing/docs pages, published reviews, user reports), not hands-on testing.
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Try UnityFrequently Asked Questions
What is Unity ML-Agents?
Unity ML-Agents is Open-source Unity toolkit for training intelligent agents using reinforcement learning, imitation learning, and curiosity It's designed for game devs and researchers training agents in unity.
How much does Unity ML-Agents cost?
Unity ML-Agents offers a completely free service with no subscription required You can get started for free on their official website.
Who should use Unity ML-Agents?
Unity ML-Agents is best suited to game devs and researchers training agents in unity.