Last Week in AI #345 - 5 new models, 9 misalignment incidents, some DotsAnthropic and OpenAI race to release smarter and cheaper models, OpenAI discloses nine misalignment incidents, and more!Last Week in AISep 30, 2026∙ Paid241ShareTop NewsAnthropic and OpenAI race to release smarter and cheaper modelsSources:Anthropic launches Claude Opus 5.5 with stricter safeguards for cybersecurityOpenAI launches GPT-6 Sol and Luna, boasting lower cost and fewer mistakesOpenAI launches GPT-6.1 Sol, says it nearly matches GPT-6 Astra and costs lessAnthropic releases Sonnet 5.5, which it calls a…Continue reading this post for free, courtesy of Last Week in AI.Claim my free postOr purchase a paid subscription.