AI leaders release new models and pricing changes

9/23/2026

Frontier AI models from Anthropic and OpenAI are getting faster and cheaper See what Claude Opus 5.5 and GPT-6 Sol mean for the AI race

Anthropic and OpenAI released new frontier AI models within a short window, underscoring how quickly the two companies continue to compete. Anthropic said Claude Opus 5.5 improves on earlier versions while lowering price, while OpenAI introduced GPT6 Sol and Luna with reduced pricing compared with the models they replace. OpenAI also said it has created an advisory group of mathematicians to help review how its AIgenerated math results are vetted and shared. The group includes wellknown researchers and is intended to provide guidance on correctness, originality, and credit. The newsletter also highlighted practical AI tools and related industry updates, including a guide on using Codex to prepare an app for App Store submission and the launch of the Horowitz Andreessen Academy, a new AIfocused alternative education program.