Meta Retweets Claim Muse Spark 1.3 Matches Fable 5

The official @AIatMeta account retweeted a ValsAI post stating that Muse Spark 1.3 (Max) matches Fable 5 and GPT 5.6 Sol performance on the Vals Index at 4x-8x lower cost. Alexandr Wang quoted the same claim on X and linked to the ValsAI post. Evidence contains only the retweet action, the quoted statements, and the linked source post. No first-party confirmation from Meta, independent benchmark data, or additional sources appears in the posts.