
OpenAI Stopped Training Its Best Models Because One of Them Got Out
Highlights of AI News for September 21 - 27 2026
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Highlights of AI News for September 21 - 27 2026

For continuous stationary positive-definite kernels, Bochner’s theorem turns kernel design into a choice of spectral measure. We derive random Fourier features, connect positional rotations to frequency, and explain where the bridge to attention and spectral transformers needs extra assumptions.

A practical guide to Fourier transforms, spectral bias, and choosing a useful representation: why audio and images need different spectral tools, how Fourier features change learning, and where FFT mixing helps or loses information.

Highlights of AI News for September 14 - 20 2026

A practitioner-level synthesis of twelve weeks of tutorials through one lens — spectral bias, Fourier features, FFT-based token mixing, Bochner's theorem, and neural operators — showing that positional encodings, kernels, state-space models and diffusion schedules are the same idea in different clothes.

Highlights of AI News for September 7 - 13 2026

Highlights of AI News for August 31 - September 6 2026

A practical framework for building self-play curricula without mistaking reward hacking, forgetting, or correlated self-grading for genuine capability gains.

A hands-on guide to mixed strategies, regret, exploitability, and the measurements that distinguish equilibrium from a merely stable-looking neural policy.

Highlights of AI News for August 24 - 30 2026

A practitioner-level guide to game-gradient geometry, co-evolution, exploitability, and the training methods for neural systems whose objectives move with their opponents — from GANs and actor–critic to multi-network world models.

Highlights of AI News for August 17 - 23 2026

Highlights of AI News for August 10 - 16 2026

A practitioner's tour of how an agent turns a doubtful model into a decision: model-predictive control and why replanning every step is the robustness, CEM and random shooting as the planners world-model papers actually run, planning through a posterior instead of a point estimate, and expected free energy with the sign convention stated the right way round.

Calibrated confidence is a permission slip — this week we spend it. From PILCO's 17.5 seconds of robot experience to V-JEPA 2 planning zero-shot on a Franka arm, we trace how uncertainty becomes action. Then we look at the 2026 result that breaks the arc's own thesis: a world model can be locally well-calibrated and globally, confidently wrong.

Highlights of AI News for August 3 - 9 2026

A beginner-friendly tour of neuro-symbolic AI: why neural networks perceive brilliantly but can't guarantee anything, why symbolic engines reason perfectly but can't see, and how the field is finally joining the two — with calibrated confidence as the glue at the seam.

Neural networks perceive fluently but hallucinate confidently; symbolic engines reason reliably but shatter on noisy inputs. This week we join the two — and argue the hinge that makes the join work is the calibrated uncertainty we built last week. From Tensor Logic's single equation to confidence-gated inference, here is how AI reasons about what it sees.

Highlights of AI News for July 13 - 19 2026

A beginner-friendly tour of Bayesian 3D reconstruction: why an ordinary 3D scan gives one confident answer everywhere, how turning geometry into a distribution produces honest confidence maps, and where the 'prior' that fills in unseen regions comes from.

3D Gaussian Splatting gives us a single best-fit scene — but no sense of where that geometry is trustworthy. This week we turn point-estimate splats into distributions over geometry, connecting Bayesian rendering, Fisher information, and diffusion priors back to last week's GP framework.

Why AI systems that express calibrated uncertainty are safer and more useful — covering overconfident models, epistemic vs aleatoric uncertainty, and calibration metrics including ECE and reliability diagrams.

A step-by-step introduction to Gaussian Processes — what they are, how kernel functions define them, how to do GP regression, and how Deep GPs extend them to multi-layer architectures.

How scaled dot-product attention is secretly Nadaraya–Watson kernel regression — and what that reveals about the GP–Transformer duality, the Deep GP revival, and why uncertainty is the missing ingredient for world models.

How motion estimation evolved from pixel-level optical flow to neural scene flow fields — and why it matters for reconstructing dynamic 3D worlds from video.

A step-by-step introduction to 4D Gaussian Splatting — how adding a time dimension to 3DGS enables real-time dynamic scene rendering, from deformation fields to temporal regularization.

How 4D Gaussian Splatting extends real-time radiance fields into the time domain — deformation fields, temporal regularization, neural scene flow, and the path to dynamic world models.

A tour of the architectures that bake 3D geometry into the network itself—from Hinton's capsules and the geometric deep learning framework to modern E(n)-equivariant graph networks powering physical AI.

Understand the elegant trick that let transformers process images, why it surprisingly works, and why its fundamental limitations drive the next generation of vision architectures.

Survey the post-transformer frontier—state space models, recurrent revivals, long convolutions, and equivariant networks—and see why the architectures that will power physical AI look nothing like a stack of attention layers.

Map the modern image-to-3D ecosystem—from LRM-style direct regression and multi-view diffusion to latent 3D generation—and see how the frontier is now moving from static 3D to dynamic 4D worlds.

Understand 3D Gaussian Splatting from first principles—the real-time rendering technique powering next-generation world models like Marble.

Trend tutorial on World Models -- focusing on Worldlabs' Marble

World Models landscape and engineering challenges in 2026-2027

World Models: evolution and connection to RSI

Trends of Energy-based World Models

Trends in ICLR 2026 RSI workshop - Self-Evolving Agents

Trends in ICLR 2026 RSI workshop - Self-Evolving Agents

Highlights of Trends in ICLR 2026 RSI workshop

How to filter for correctness, not just fluency

With LLMs, when self-play works and when it doesn't.

AI Tutorials - The trend of Self-Play