[AINews] Muse Spark 1.3 matches GPT-5.6-Sol, confirming Meta Superintelligence as the newest Frontier Lab, >90% discount for training

https://www.latent.space/p/ainews-muse-spark-13-matches-gpt

An update on a story from last week: while Meta's Muse Spark 1.3 and open-weights releases are mentioned in the newsletter, this specific issue is largely a roundup of AI news and links, with no qualifying hard technical content.

Source: Latent Space $2026-09-03$.