Meta releases Muse Spark 1.3, matching GPT-5.6 Sol on coding

Muse Spark 1.3 scores 62 on the Artificial Analysis Intelligence Index, behind only Claude Fable 5.1 and Opus 5, and tops DeepSWE 1.1 with 75.4%. It is available now in Muse Code and Meta Model API, with open weights coming later.
How this story unfolded
1 day · 6 reports · 26 community posts · from Sep 2
- Sep 2
- Sep 3
[AINews] Muse Spark 1.3 matches GPT-5.6-Sol, confirming Meta Superintelligence as the newest Frontier Lab, >90% discount for traininglatent.space
“Google was ahead only a few hours”: Muse Spark 1.3 edges out Gemini as Meta claims its biggest coding leap yetthenewstack.io
Meta says Muse Spark 1.3 has frontier performance — but its best results come from a model developers can’t broadly use yetventurebeat.com
Meta AI Released Muse Spark 1.3: An Agentic Coding Model That Uses ~20% Fewer Tool Calls and ~25% Fewer Tokens Than Muse Spark 1.2marktechpost.com
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