Research institute · Research orgs · United States (multiple hubs; Timaeus materials cite hubs in Berkeley, Melbourne · Est. 2023
Timaeus (timaeus.co) is an AI safety research organization that focuses on applying singular learning theory (SLT) to developmental interpretability and technical AI alignment. Its core research direction is to understand how training data shapes model behavior and how internal neural-network structure emerges during training (e.g., through stages/“phase transitions” in the SLT sense), with the stated goal of building interpretability and evaluation tools that can support safer model development and alignment.
As of 2026-06-10, Timaeus says it has “now [become] Resolution,” and the site points to Resolution’s open roles and launches. The Timaeus program is therefore best understood as the SLT/developmental-interpretability research component that fed into Resolution’s broader nonprofit research effort. Technically, Timaeus’s differentiation (vs. many interpretability approaches centered on activations/probes) is its emphasis on SLT-grounded measurements and estimators (e.g., susceptibilities and related “spectroscopy” tooling) and “developmental” analysis of how internal structures form over training. The organization maintains an open-source research package, DevInterp, intended to let external researchers perform SLT/DevInterp-style research on large language models.
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Timaeus publishes a paper page describing a method (Posterior Prefix Tuning) for steering transformer behavior in a latent-posterior setting without backpropagation through the transformer, and validates it on specified Bayesian filtered transformer setups.
Paper: “Linear Response Estimators for Singular Statistical Models” (Published May 8, 2026)Timaeus publishes a paper page defining susceptibilities in singular statistical models and providing estimators with consistency and asymptotic unbiasedness statements.
Timaeus Research Fellows Program launched (structured affiliation for senior academic researchers)Timaeus announces a Research Fellows Program for tenured faculty and senior researchers, including described benefits (compensation, compute access, travel, co-authorship) and governance interactions with Directors of Research/Engineering/Executive Director.
Open Roles @ Timaeus (Research Engineer and Research Scientist hiring; posted Jan 7, 2026)Timaeus posts a hiring update for Research Engineer and Research Scientist roles focused on applications of singular learning theory to alignment.
“Timaeus’s First Four Months” progress update (Feb 28, 2024)Timaeus publishes an early progress update describing research uncertainties, contributions, and early alignment-relevant interpretability direction setting.
Timaeus “Our Team” lists current leadership and research/engineering leadsTimaeus publishes a team page listing leadership (Executive Director, Research Director, Director of Engineering, Director of Operations) and additional research leads/scientists and engineers.