Last Week in AI #343 - GPT-6, OpenAI’s agents chatted on a wiki, Fable 5.1

OpenAI has begun testing GPT-6 Astra, while researchers have identified a previously unknown message board used by the company to coordinate autonomous agents. Additionally, Anthropic has released Fable 5.1, claiming the update reduces costs for agent-based tasks by up to 45 percent. These developments highlight the industry's rapid shift toward autonomous agentic workflows and the ongoing competition to lower the computational expenses associated with them.