Marc Lanctot

Research Scientist at Google DeepMind, multiagent RL

Why they matter

Research Scientist at Google DeepMind, multiagent RL with public evidence across Agents & robotics, AI research, Models & releases.

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past 30d
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4d ago
View every signal from Marc Lanctot β†’
Research Scientist at Google DeepMind, interested in multiagent reinforcement learning, game theory, games, and search/planning. Lover of Linux 🐧, coffee β˜•, and retro gaming. Big fan of open-source. #gohabsgo πŸ‡¨πŸ‡¦ For more info: https://linktr.ee/sharky6000

Articles & links

↻ Marc Lanctot reposted
Eugene Vinitsky @eugenevinitsky.bsky.social

In our Nature paper, we introduce the first superhuman Stratego AI, which we built using general techniques that we developed for RL & test-time compute under imperfect information. www.nature.com/articles/s41...

Scalable decision-making for games of imperfect information - Nature nature.com
AI Weekly's analysis β†’
  • Ataraxos beat Pim Niemeijer, the most decorated Stratego player, by 15 wins, 1 loss and 4 draws over 20 games.
  • Training cost was under $8,000, versus an estimated $3–4.5 million for DeepMind's prior Stratego system DeepNash.
  • The same self-play plus test-time search recipe also produced a superhuman Barrage Stratego AI and state-of-the-art bots for Hanabi and dou dizhu.
Read full analysis β†’
View on Bluesky β†’
↻ Marc Lanctot reposted
Eugene Vinitsky @eugenevinitsky.bsky.social

In our Nature paper, we introduce the first superhuman Stratego AI, which we built using general techniques that we developed for RL & test-time compute under imperfect information. www.nature.com/articles/s41...

Scalable decision-making for games of imperfect information - Nature nature.com
AI Weekly's analysis β†’
  • Ataraxos beat top Stratego player Pim Niemeijer 15 wins to 1, with 4 draws over 20 games, which the authors call the first superhuman result in Stratego's history.
  • The system was trained for roughly $8,000 on 16 NVIDIA H100 GPUs for a week, against an estimated $3-4.5 million for the prior DeepNash effort.
  • The same approach set a new state of the art in cooperative Hanabi across 2-5 player variants and defeated PerfectDou and DouZero at Dou Dizhu.
Read full analysis β†’
View on Bluesky β†’
↻ Marc Lanctot reposted
Eugene Vinitsky @eugenevinitsky.bsky.social

In our Nature paper, we introduce the first superhuman Stratego AI, which we built using general techniques that we developed for RL & test-time compute under imperfect information. www.nature.com/articles/s41...

Scalable decision-making for games of imperfect information - Nature nature.com
AI Weekly's analysis β†’
  • Ataraxos defeated Stratego's most decorated player Pim Niemeijer 15-1-4 in a 20-game official series, an 85% effective win rate.
  • The system trained on 16 NVIDIA H100 GPUs for one week at a cost of a few thousand dollars, roughly 1/500th of DeepMind's DeepNash.
  • The same method set new state-of-the-art on Barrage Stratego, 2-to-5-player Hanabi, and Dou dizhu, not just Stratego.
Read full analysis β†’
View on Bluesky β†’
↻ Marc Lanctot reposted
Eugene Vinitsky @eugenevinitsky.bsky.social

In our Nature paper, we introduce the first superhuman Stratego AI, which we built using general techniques that we developed for RL & test-time compute under imperfect information. www.nature.com/articles/s41...

Scalable decision-making for games of imperfect information - Nature nature.com
AI Weekly's analysis β†’
  • Ataraxos beat the most decorated human Stratego player 15 wins to 1 loss with 4 draws, which the authors call the first superhuman Stratego result.
  • The system ran on 16 NVIDIA H100 GPUs for a week, about $8,000 of compute, versus the roughly $3-4.5 million spent on prior Stratego AI DeepNash.
  • The same recipe produced a superhuman Barrage Stratego AI and state-of-the-art results on cooperative Hanabi and the Chinese card game dou dizhu.
Read full analysis β†’
View on Bluesky β†’
↻ Marc Lanctot reposted
Eugene Vinitsky @eugenevinitsky.bsky.social

In our Nature paper, we introduce the first superhuman Stratego AI, which we built using general techniques that we developed for RL & test-time compute under imperfect information. www.nature.com/articles/s41...

Scalable decision-making for games of imperfect information - Nature nature.com
AI Weekly's analysis β†’
  • Ataraxos defeated Pim Niemeijer, the most decorated human Stratego player of all time, 15 games to 1 with 4 draws over a 20-game series.
  • Training cost under $8,000 at 2025 pricing versus roughly $3-$4.5 million for DeepNash: 1/500th the compute, 1/30th the self-play games.
  • Same recipe hit a new state-of-the-art in Hanabi across 2-5 players and beat PerfectDou and DouZero in dou dizhu.
Read full analysis β†’
View on Bluesky β†’
↻ Marc Lanctot reposted
Eugene Vinitsky @eugenevinitsky.bsky.social

In our Nature paper, we introduce the first superhuman Stratego AI, which we built using general techniques that we developed for RL & test-time compute under imperfect information. www.nature.com/articles/s41...

Scalable decision-making for games of imperfect information - Nature nature.com
AI Weekly's analysis β†’
  • Ataraxos beat Pim Niemeijer, the most decorated Stratego player in the game's history, 15 wins to 1 loss with 4 draws over 20 games.
  • Training ran roughly $8,000 on 16 NVIDIA H100s for a week, about 1/500th the compute cost of DeepMind's prior DeepNash system.
  • The same recipe set new state-of-the-art marks on Hanabi for 2 to 5 players, Barrage Stratego, and Dou Dizhu.
Read full analysis β†’
View on Bluesky β†’
↻ Marc Lanctot reposted
Eugene Vinitsky @eugenevinitsky.bsky.social

In our Nature paper, we introduce the first superhuman Stratego AI, which we built using general techniques that we developed for RL & test-time compute under imperfect information. www.nature.com/articles/s41...

Scalable decision-making for games of imperfect information - Nature nature.com
AI Weekly's analysis β†’
  • Ataraxos defeated Pim Niemeijer, Stratego's most decorated player, with 15 wins, 1 loss and 4 draws across a 20-game series.
  • The system was trained for 'a few thousand dollars' on 16 H100 GPUs for one week, versus $3-4.5 million for DeepMind's DeepNash.
  • It also beat top Barrage Stratego players, PerfectDou and DouZero at Dou Dizhu, and set new Hanabi scores across 2-5 players.
Read full analysis β†’
View on Bluesky β†’

Recent commentary

I'm delighted to announce the release of OpenSpiel 2.0! β™ŸοΈπŸŽ²β™¦οΈπŸŽ‰ Structured types for states, observations, and actions, standard trajectories (based on JSON), 19 new games, AlphaZero ported to JAX, Windows PyPI support, language model fine-tuning examples and an MCP server (demo below πŸ€©πŸ‘‡)! 🧡 1/N

View on Bluesky Β· β™₯ 65 ↻ 13 ↩ 4 Β· 96d ago

The For You feed is getting amazingly good. Lately I feel like it's Twitter circa 2014. I have found more relevant stuff in my AI research meets retro games meets cat & dog memes niche than ever before, despite zero or negative DAU growth. Well done @spacecowboy17.bsky.social .. keep this up! πŸ«΅πŸ‘πŸ™Œ

View on Bluesky Β· β™₯ 73 ↻ 6 ↩ 0 Β· 100d ago

Had a great time @coop-ai.bsky.social summer school yesterday! Learned many new things, was made aware of some great work, and met some people! I got all nostalgic being on UofT campus.. somehow haven't returned to the campus since we left Toronto 14 years ago. Saw some old faves downtown, too πŸ˜πŸπŸ¦«πŸ‡¨πŸ‡¦

View on Bluesky Β· β™₯ 5 ↻ 0 ↩ 3 Β· 75d ago

These days you're not a serious AI startup unless you're using "in-" as a prefix for your name: - Inflection - Ineffable - Inherent Let's look for a few more!

View on Bluesky Β· β™₯ 1 ↻ 0 ↩ 5 Β· 138d ago

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