AI Learns to Play Dota 2 with Human Precision

Developers from the California-based non-profit OpenAI announced today that their five deep learning neural networks they call “OpenAI Five” beat amateur human…

Nefi Alarcon
2 min readintermediate
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Overview

OpenAI has developed 'OpenAI Five', a set of five deep learning neural networks that have achieved human-level performance in Dota 2 by defeating amateur teams. The AI trains through self-play using advanced reinforcement learning techniques, leveraging significant computational resources.

What You'll Learn

1

How to utilize reinforcement learning for complex game strategies

2

Why self-play is effective for training AI in dynamic environments

3

When to apply deep learning techniques in competitive gaming scenarios

Key Questions Answered

How does OpenAI Five learn to play Dota 2?
OpenAI Five learns to play Dota 2 through self-play, utilizing a scaled-up version of Proximal Policy Optimization. It trains on millions of hours of game footage without using human data, allowing it to develop recognizable strategies independently.
What technology does OpenAI use to train its AI?
OpenAI employs 256 NVIDIA Tesla P100 GPUs and 128,000 CPU cores on Google Cloud to train its neural networks. This setup enables the AI to play 180 years of gameplay against itself every day, achieving a total of 900 years of gameplay across all AI players.
What is the goal of OpenAI Five in Dota 2?
The goal of OpenAI Five is to compete against top professional human gamers at The International, an annual Dota 2 eSports tournament, aiming to demonstrate its capabilities against the best in the field.
What challenges does OpenAI face in Dota 2?
OpenAI acknowledges that Dota 2 is a complex and popular eSports game with a dynamic environment that changes frequently. The competition includes highly skilled professionals who train year-round for a substantial prize pool, making success uncertain.

Key Statistics & Figures

Training capacity
180 years of gameplay per day
This is the amount of gameplay OpenAI Five can simulate against itself daily.
Total gameplay across AI players
900 years of gameplay per day
This figure represents the cumulative gameplay when considering all five AI players.
Computational resources used
256 NVIDIA Tesla P100 GPUs and 128,000 CPU cores
These resources are utilized to train the OpenAI Five neural networks.
Prize pool for Dota 2
$40M
This is the largest annual prize pool in eSports, highlighting the competitive nature of Dota 2.

Technologies & Tools

Hardware
Nvidia Tesla P100
Used for training the OpenAI Five neural networks.
Algorithm
Proximal Policy Optimization
The reinforcement learning algorithm employed for training the AI.

Key Actionable Insights

1
Implementing self-play in AI training can significantly enhance learning efficiency.
By allowing AI to learn from its own experiences rather than relying on human data, developers can create systems that adapt to complex environments, such as competitive gaming.
2
Utilizing high-performance computing resources is crucial for training advanced AI models.
OpenAI's use of 256 GPUs and 128,000 CPU cores illustrates the importance of computational power in achieving rapid learning and performance improvements in AI systems.
3
Understanding the dynamics of the game environment is essential for AI development.
As Dota 2 receives updates every two weeks, developers must ensure that their AI can adapt to these changes to remain competitive.

Common Pitfalls

1
Underestimating the complexity of training AI in dynamic environments.
Many developers may not realize that frequent updates in games like Dota 2 require continuous adaptation of AI strategies, which can complicate the training process.