[OpenAI · openai.com](<https://openai.com/index/openai-baselines-acktr-a2c/>)

# OpenAI Baselines: ACKTR & A2C

We’re releasing two new OpenAI Baselines implementations: ACKTR and A2C. A2C is a synchronous, deterministic variant of Asynchronous Advantage Actor Critic (A3C) which we’ve found gives equal performance. ACKTR is a more sample-efficient reinforcement learning algorithm than TRPO and A2C, and requires only slightly more computation than A2C per update.

1. [New Releases · OpenAI](<https://curation.space/openai/new-releases>)