State of Open Models: Summer 2026 Observations

2023, year of open LLMs

OlmoEarth v1.1: A more efficient family of Earth observation models

Evolution through large models

Aurora 1.5: Extending open foundation models for weather and Earth-system applications

Aurora 1. 5 adds 22 more variables, hourly temporal resolution, and probabilistic ensemble forecasting to the Aurora foundation model, making it more useful for real-world weather, climate, and energy applications.

Introducing the Model Spec

OpenAI Scholars 2020: Applications open

We are now accepting applications for our third class of OpenAI Scholars.

OpenAI to acquire Neptune

OpenAI is acquiring Neptune to deepen visibility into model behavior and strengthen the tools researchers use to track experiments and monitor training.

My Workflow for Understanding LLM Architectures

A learning-oriented workflow for understanding new open-weight model releases

Welcome GPT OSS, the new open-source model family from OpenAI!

A Dream of Spring for Open-Weight LLMs: 10 Architectures from Jan-Feb 2026

A Round Up And Comparison of 10 Open-Weight LLM Releases in Spring 2026

OpenAI API

We’re releasing an API for accessing new AI models developed by OpenAI.

OpenAI Scholars 2020: Final projects

Our third class of OpenAI Scholars presented their final projects at virtual Demo Day, showcasing their research results from over the past five months.