Today in AI — 2026-09-23

Top AI stories of the day, ranked by source authority + keyword signal. Auto-curated from 27 trusted sources.

1. Introducing MentalHealthBench

Source: OpenAI Blog · Signal: 81 ·

MentalHealthBench is an expert-informed benchmark for evaluating helpful and safe AI responses across realistic mental health conversations.

2. Two years of OpenAI Academy

Source: OpenAI Blog · Signal: 70 ·

Marking two years of OpenAI Academy and bringing AI skills to even more communities.

3. OpenAI extends cyber access to Ukraine for civilian defense

Source: OpenAI Blog · Signal: 70 ·

OpenAI is extending access to its Daybreak program to the Government of Ukraine to support the cyber defense of civilian infrastructure.

4. Harvey turns legal context into stronger drafts with GPT-6 Astra

Source: OpenAI Blog · Signal: 69 ·

GPT-6 Astra produces more structured, context-aware legal documents, freeing lawyers to focus on strategy.

5. How invideo improves color grading 3x with GPT‑6 Astra

Source: OpenAI Blog · Signal: 69 ·

With GPT‑6 Astra, invideo plans edits with greater precision, improves color correction and grading threefold, and produces 50 custom effects in one day.

6. Sam Altman’s remarks at the United Nations Security Council

Source: OpenAI Blog · Signal: 69 ·

OpenAI CEO Sam Altman discusses AI safety, human control, and international cooperation in remarks to the United Nations Security Council.

7. Grab and OpenAI bring practical AI skills to Southeast Asia

Source: OpenAI Blog · Signal: 69 ·

OpenAI and Grab launch GO Forward with AI, a regional programme helping 30,000 partners build practical AI skills across Southeast Asia.

8. Airbnb widens access to GPT-6 Astra and OpenAI frontier models

Source: OpenAI Blog · Signal: 68 ·

Learn how Airbnb is expanding access to GPT-6 Astra and OpenAI frontier models to help engineering teams solve bugs, design systems, and ship faster.

9. ChatGPT Ads expands to Southeast Asia and Taiwan

Source: OpenAI Blog · Signal: 67 ·

ChatGPT Ads is expanding to Southeast Asia and Taiwan, giving eligible businesses new ways to reach people across more than 60 countries.

10. Gemini 3.8 TTS Playground

Source: Simon Willison Blog · Signal: 65 ·

11. Shadow roots, explained with live examples

Source: Simon Willison Blog · Signal: 65 ·

12. SF October 14th: A Birds of a Feather Session on Agentic Engineering

Source: Simon Willison Blog · Signal: 65 ·