Skip to content

Browse Newsletter

Search Personalize Sign in

Home Browse Newsletter Search

The state of AI, in one place. Curated so you arrive already caught up, not buried in another feed.

Companies New Tech Practical

About Feedback Privacy Terms

© 2026 Signal · An independent AI information hub

The Signal Brief

Thursday, September 24, 2026

3 stories · 1 min read

General edition

Today’s developmentUnverified claim

OpenAI cuts GPT-6 prices in half with Sol and Luna

The essential AI developments selected to keep you current.

SourceThe Next Web ↗context

OpenAI released GPT-6 Sol and GPT-6 Luna at half the per-token price of previous GPT-6 models.

Halving per-token prices reduces operational costs for AI-dependent applications.

Also for you

02CompaniesUnverified claim

Claude Opus 5.5, GPT-6 Sol, GPT-6 Luna, and a new price war

Anthropic released Claude Opus 5.5, and OpenAI released GPT-6 Sol and Luna. GPT-6 models are half the price of GPT-5.6 equivalents, intensifying the market price war.

Simon Willison5d agoCompanies

03Companies

"We have a choice": AI leaders sound alarm at UN

Executives from OpenAI, Anthropic, and Hugging Face warned the UN Security Council that rapid AI advancement outpaces safety safeguards, urging international cooperation and strict control standards.

Axios — Technology4d agoCompanies

Three stories today, selected for signal, not volume. Everything else Signal read today

From the archive

Sat, Sep 26
Fri, Sep 25
Wed, Sep 23
Tue, Sep 22
Mon, Sep 21
Sun, Sep 20
Sat, Sep 19