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Muse Spark 1.3 reportedly lifts average test pass rate from 47.0% to 68.6% at xhigh
A user comparing versions 1.1 and 1.3, both at xhigh, says 1.3 used 39% fewer tokens across the benchmark and brought the number of programs at least 95% resolved from eight to 33.
TLDR
A user reports that Muse Spark’s average test pass rate rose from 47.0% in version 1.1 to 68.6% in 1.3 at xhigh, while token use fell 39% across the benchmark. In a separate comparison, they say Muse Spark at max averaged $6.46 per task and fully resolved five programs, versus GPT-5.6 Sol xhigh at $6.08 and two. They put Opus 5 at nine fully resolved programs and $50.53 per task.
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