Papers › Soft Actor-Critic for Discrete Action Settings

Soft Actor-Critic for Discrete Action Settings

16 Oct 2019arXiv:1910.07207archive 2025-07-28

Petros Christodoulou

Soft Actor-Critic is a state-of-the-art reinforcement learning algorithm for continuous action settings that is not applicable to discrete action settings. Many important settings involve discrete actions, however, and so here we derive an alternative version of the Soft Actor-Critic algorithm that is applicable to discrete action settings. We then show that, even without any hyperparameter tuning, it is competitive with the tuned model-free state-of-the-art on a selection of games from the Atari suite.

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Code

Syntology Ran 4 of 18 code samples harvested from 4 repositories linked to this paper; 14 have no recorded run. Of those that ran: 2 ran · honoured contract; 1 ran · violated contract; 1 ran with no contract checked.

By repository: official repository: 2 samples from 1 repository, 0 ran; community (archive-listed): 13 samples from 3 repositories, 1 ran; 3 identical to code first harvested elsewhere. The run record, sample by sample. “Ran” means executed on a synthesized input, not that the code is correct or reproduces the paper.

13 repositories listed; official and paper-mentioned ones first.

p-christ/Deep-Reinforcement-Learning-Algorithms-with-PyTorch officialmentioned in papermentioned on GitHubpytorchMIT report
Epsilon10/MARL mentioned on GitHubpytorch report
ac-93/soft-actor-critic mentioned on GitHubtf report
cindycia/Atari-SAC-Discrete mentioned on GitHubpytorchMIT report
keraJLi/rejax mentioned on GitHubjaxApache-2.0 report
ku2482/rljax mentioned on GitHubjaxMIT report
ku2482/rltorch mentioned on GitHubpytorchMIT report
ku2482/sac-discrete.pytorch mentioned on GitHubpytorch report

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Code Syntology ran Syntology

18 samples harvested; 4 ran; 2 honoured the contract we drafted; 14 have no recorded run. Read from Syntology's graph 2026-09-24; that is when this build read the record, not when the samples ran.

2ran · honoured contract
1ran · violated contract
1ran
14unverified

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make_atari_game p-christ/Deep-Reinforcement-Learning-Algorithms-with-PyTorch/environments/Atari_Environment.py official repository unverified MIT (permissive) · 5518bf3701f7ad8c · report
wrap_deepmind p-christ/Deep-Reinforcement-Learning-Algorithms-with-PyTorch/environments/Atari_Environment.py official repository unverified MIT (permissive) · f22df3c0c0b99757 · report
to_batch cindycia/Atari-SAC-Discrete/rltorch/agent/utils.py community (archive-listed) ran MIT (permissive) · 3afd917c65b80e08 · report
EpsilonGreedyPolicy keraJLi/rejax/src/rejax/networks.py community (archive-listed) unverified Apache-2.0 (permissive) · 159ca677b48225e4 · report
EpsilonGreedyPolicy keraJLi/rejax/src/rejax/algos/iqn.py community (archive-listed) unverified Apache-2.0 (permissive) · 6fe3b3b62f1d627e · report
create_dqn_base cindycia/Atari-SAC-Discrete/rltorch/network/builder.py community (archive-listed) unverified MIT (permissive) · c010a6ac8668e20d · report
create_linear_network cindycia/Atari-SAC-Discrete/rltorch/network/builder.py community (archive-listed) unverified MIT (permissive) · 95498252faaec791 · report
evaluate_single keraJLi/rejax/src/rejax/evaluate.py community (archive-listed) unverified Apache-2.0 (permissive) · 098ce6dc4eff278c · report
initialize_weights cindycia/Atari-SAC-Discrete/rltorch/network/builder.py community (archive-listed) unverified MIT (permissive) · a6efcc2f264c05c0 · report
make_atari cindycia/Atari-SAC-Discrete/rltorch/env/atari_wrappers.py community (archive-listed) unverified MIT (permissive) · 4bc698f17fe89d85 · report
make_pytorch_env cindycia/Atari-SAC-Discrete/rltorch/env/atari_wrappers.py community (archive-listed) unverified MIT (permissive) · 20aa2a394b00c4d7 · report
make_pytorch_env ku2482/rltorch/rltorch/env/atari_wrappers.py community (archive-listed) unverified MIT (permissive) · 4710cb8bbbee96dd · report
register_init keraJLi/rejax/src/rejax/algos/algorithm.py community (archive-listed) unverified Apache-2.0 (permissive) · e62f6ecb2ba1c892 · report
update_rms keraJLi/rejax/src/rejax/algos/mixins.py community (archive-listed) unverified Apache-2.0 (permissive) · ea614117ba22d252 · report
wrap_deepmind_pytorch cindycia/Atari-SAC-Discrete/rltorch/env/atari_wrappers.py community (archive-listed) unverified MIT (permissive) · 4d7ad6b7f3100923 · report
process_action identical code first harvested elsewhere ran · honoured contract fingerprinted licence of this copy not recorded · e5cbade112f15d84 · report
process_observation identical code first harvested elsewhere ran · honoured contract fingerprinted licence of this copy not recorded · 22e993f58f0d200b · report
process_reward identical code first harvested elsewhere ran · violated contract fingerprinted licence of this copy not recorded · 1deaa4d231ac8f53 · report

Tasks

Atari GamesReinforcement LearningReinforcement Learning (RL)reinforcement-learning

Results from the paper archive 2025-07-28

TaskDatasetModelMetricValueRank at snapshotLeaderboardReport
Atari Games Atari 2600 Alien SAC Score 216.9 #47 of 49 Archive leaderboard report
Atari Games Atari 2600 Amidar SAC Score 7.9 #48 of 48 Archive leaderboard report
Atari Games Atari 2600 Assault SAC Score 350 #45 of 45 Archive leaderboard report
Atari Games Atari 2600 Asterix SAC Score 272 #49 of 49 Archive leaderboard report
Atari Games Atari 2600 Battle Zone SAC Score 4386.7 #46 of 47 Archive leaderboard report
Atari Games Atari 2600 Beam Rider SAC Score 432.1 #48 of 49 Archive leaderboard report
Atari Games Atari 2600 Breakout SAC Score 0.7 #58 of 58 Archive leaderboard report
Atari Games Atari 2600 Crazy Climber SAC Score 3668.7 #48 of 49 Archive leaderboard report
Atari Games Atari 2600 Enduro SAC Score 0.8 #44 of 48 Archive leaderboard report
Atari Games Atari 2600 Freeway SAC Score 4.4 #51 of 59 Archive leaderboard report
Atari Games Atari 2600 Frostbite SAC Score 59.4 #53 of 53 Archive leaderboard report
Atari Games Atari 2600 James Bond SAC Score 68.3 #44 of 45 Archive leaderboard report
Atari Games Atari 2600 Kangaroo SAC Score 29.3 #46 of 47 Archive leaderboard report
Atari Games Atari 2600 Ms. Pacman SAC Score 690.9 #45 of 47 Archive leaderboard report
Atari Games Atari 2600 Pong SAC Score -20.98 #52 of 52 Archive leaderboard report
Atari Games Atari 2600 Q*Bert SAC Score 280.5 #53 of 57 Archive leaderboard report
Atari Games Atari 2600 Road Runner SAC Score 305.3 #42 of 44 Archive leaderboard report
Atari Games Atari 2600 Seaquest SAC Score 211.6 #55 of 57 Archive leaderboard report
Atari Games Atari 2600 Space Invaders SAC Score 160.8 #54 of 55 Archive leaderboard report
Atari Games Atari 2600 Up and Down SAC Score 250.7 #44 of 44 Archive leaderboard report

Ranks are positions in the archive's leaderboards as they stood at the 2025-07-28 snapshot. Results published since then are not among these rows, so a rank here is not a current standing.

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