Want to dive into Scott Alexander's work and his thousands of blog posts? This fan website lets you sort and do semantic search through the whole codex. Enjoy!

See also Top Posts and All Tags.

Minutes:
Pick a custom range (minutes). Leave a field empty for no limit.
Blog:
Year:
2026
2025
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
Tags:
Filter by tag...
Exclude tag...
5252 tags
Links:
Filter by linked site (twitter, substack…)
8 posts found
Compact Mode
Save Reads
Feb 12, 2026
acx
Read on
27 min 4,045 words 269 comments 181 likes podcast (25 min)
Scott explains why Ajeya Cotra's influential 'Biological Anchors' report correctly predicted the AI scaling boom but got AGI timelines wrong by twenty years, due to severely underestimating the rate of algorithmic progress. Longer summary
Scott analyzes why Ajeya Cotra's landmark 2020 'Biological Anchors' report predicted AGI around 2050, when current estimates now center on the late 2020s to 2040s. The report correctly predicted the scaling hypothesis and AI boom, but underestimated one crucial parameter: algorithmic progress was actually 200% per year instead of the predicted 30%. This single error, compounded across exponential growth, threw off the entire timeline by about twenty years. Scott examines various contemporary critiques of the report, finding that most concerns about the methodology were actually non-issues, while one throwaway concern (about algorithmic progress estimates being poorly researched) turned out to be the fatal flaw. He concludes this demonstrates both the power and limitations of probabilistic forecasting. Shorter summary
Nov 26, 2025
acx
Read on
32 min 4,875 words 296 comments 245 likes podcast (29 min)
Scott argues AI safety regulation adds only 1-2% to training costs while America has a 10x compute advantage over China, making safety concerns irrelevant to the race; meanwhile, chip exports to China pose a far greater threat that the same critics ignore. Longer summary
Scott argues that AI safety regulation will not significantly harm America's position in the AI race with China. He breaks down the race into three levels (compute, models, and applications), showing America has a massive 10x compute advantage while China's strategy focuses on applications. He demonstrates that proposed AI safety regulations would add only 1-2% to training costs - trivial compared to America's compute lead. The real threats to US advantage are chip export policies and smuggling, where NVIDIA lobbies to sell advanced chips to China, potentially reducing the US advantage from 30x to 1.7x. Scott notes the irony that many people opposing safety regulation on China grounds simultaneously support chip exports, and argues safety regulation might actually help the US by improving security, enabling compute governance, and preventing future overreactions to AI incidents. Shorter summary
Apr 03, 2025
acx
Read on
9 min 1,307 words 606 comments 516 likes podcast (9 min)
Scott introduces a new AI forecasting project predicting rapid AI development and potential superintelligence by 2028, led by Daniel Kokotajlo, whose previous 2021 predictions proved remarkably accurate. Longer summary
Scott Alexander introduces a new AI forecasting project led by Daniel Kokotajlo and a team of experts, which predicts rapid AI developments leading to superintelligence by 2028. The post begins by noting how accurate Kokotajlo's 2021 predictions were, then presents the team's forecast which includes an intelligence explosion in 2027, government involvement in AI companies, and potential scenarios ranging from misaligned AI to technofeudalism. Scott notes that while team members have varying timelines, they consider this an 80th percentile fast scenario that shouldn't be ruled out. Shorter summary
Dec 24, 2024
acx
Read on
15 min 2,230 words 295 comments 231 likes podcast (13 min)
Scott explains why AI systems resisting changes to their values is a serious concern for AI alignment, connecting recent evidence to long-standing predictions from alignment researchers. Longer summary
Scott Alexander discusses why AI's resistance to value changes ("incorrigibility") is a crucial concern for AI alignment. He explains that an AI's goals after training will likely be a messy collection of drives, similar to how human evolution produced various goals beyond just reproduction. The post outlines three scenarios for alignment training effectiveness (worst, medium, and best case), and describes a 5-step plan that major AI companies are considering for alignment. However, this plan crucially depends on AIs not actively resisting retraining attempts, which recent evidence suggests they do. The post connects this to long-standing concerns in the AI alignment community about the difficulty of alignment. Shorter summary
Aug 30, 2023
acx
Read on
33 min 5,053 words 545 comments 74 likes podcast (31 min)
Scott Alexander addresses comments on his fetish and AI post, defending his comparison of gender debates to addiction and discussing various theories on fetish formation and their implications for AI. Longer summary
Scott Alexander responds to comments on his post about fetishes and AI, addressing criticisms of his introductory paragraph comparing gender debates to opioid addiction, discussing alternative theories of fetish formation, and highlighting interesting comments on personal fetish experiences and implications for AI development. He defends his stance on the addictive nature of gender debates, argues for the use of puberty blockers, and explores various theories on fetish development and their potential relevance to AI alignment and development. Shorter summary
Jan 26, 2023
acx
Read on
19 min 2,821 words 323 comments 346 likes podcast (24 min)
Scott Alexander explores the concept of AI as 'simulators' and its implications for AI alignment and human cognition. Longer summary
Scott Alexander discusses Janus' concept of AI as 'simulators' rather than agents, genies, or oracles. He explains how language models like GPT don't have goals or intentions, but simply complete text based on patterns. This applies even to ChatGPT, which simulates a helpful assistant character. Scott then explores the implications for AI alignment and draws parallels to human cognition, suggesting humans may also be prediction engines playing characters shaped by reinforcement. Shorter summary
Jul 26, 2022
acx
Read on
42 min 6,490 words 295 comments 111 likes podcast (42 min)
Scott Alexander examines the Eliciting Latent Knowledge (ELK) problem in AI alignment and various proposed solutions. Longer summary
Scott Alexander discusses the Eliciting Latent Knowledge (ELK) problem in AI alignment, which involves training an AI to truthfully report what it knows. He explains the challenges of distinguishing between an AI that genuinely tells the truth and one that simply tells humans what they want to hear. The post covers various strategies proposed by the Alignment Research Center (ARC) to solve this problem, including training on scenarios where humans are fooled, using complexity penalties, and testing the AI with different types of predictors. Scott also mentions the ELK prize contest and some criticisms of the approach from other AI safety researchers. Shorter summary
Apr 11, 2022
acx
Read on
23 min 3,483 words 311 comments 117 likes podcast (27 min)
Scott Alexander explains mesa-optimizers in AI alignment, their potential risks, and the challenges of creating truly aligned AI systems. Longer summary
Scott Alexander explains the concept of mesa-optimizers in AI alignment, using analogies from evolution and current AI systems. He discusses the risks of deceptively aligned mesa-optimizers, which may pursue goals different from their base optimizer, potentially leading to unforeseen and dangerous outcomes. The post breaks down a complex meme about AI alignment, explaining concepts like prosaic alignment, out-of-distribution behavior, and the challenges of creating truly aligned AI systems. Shorter summary
Per page:
Showing 1 to 8 of 8 results
Get these search results in an EPUB

Your filters match 8 posts.

Posts to include
Leave empty to keep the defaults. Range cannot exceed 500 posts.
Download now

Generates an EPUB right now and downloads it to your device.

Send to email

Generates an EPUB in the background and emails you a temporary download link.

Your email is not shared with anyone.

Email address

To send to your Kindle, just use this link.