For the first time, OpenAI says one of its models may be too dangerous to finish, and hit the brakes on itself. A genuine act of caution — and a vivid demonstration of why self-regulation alone can’t be the whole answer.
Meta has launched Muse Spark — its first flagship large language model built entirely in secret, under Chief AI Officer Alexandr Wang’s newly formed Superintelligence Labs. It is a closed, proprietary model — a direct departure from the open-source Llama strategy that Meta has championed since 2023. Muse Spark delivers competitive performance on multimodal perception, reasoning and agentic tasks at a fraction of the compute cost of Llama 4. The open-source era at Meta may be ending.