Meta's Muse Spark 1.3 Ranks Among Top AI Models, Matching GPT-5.6 Sol and Grok 4.6

AI at Meta ·

Key Info

Meta has released Muse Spark 1.3, its fourth Muse Spark model release in five months. The limited-preview "max" variant scores 62 on the Artificial Analysis Intelligence Index, ranking behind only Claude Fable 5.1 and Claude Opus 5, while the currently available "xhigh" variant scores 61, tying GPT-5.6 Sol (max) and Grok 4.6 (high).

Highlights

  • Muse Spark 1.3 (max), available to Meta's partners in limited preview, reached a 62 score on the Artificial Analysis Intelligence Index — third overall, ahead of GPT-5.6 Sol and Grok 4.6.
  • The available Muse Spark 1.3 (xhigh) variant ties GPT-5.6 Sol (max) and Grok 4.6 (high) with a score of 61.
  • The performance gains are driven mainly by improvements in agentic work and scientific capabilities.
  • On the DeepSWE benchmark, Muse Spark 1.3 reportedly achieved 75.4%, placing first ahead of GPT-5.6 Sol and Fable 5.
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