GPT-5.4 Nano vs Muse Ember

GPT-5.4 Nano against Muse Ember
GPT-5.4 NanoMuse Ember
Coding index44.864.9
Benchmarks behind it Partial, 2 benchmarks Verified, 3 benchmarks
Output $/Mtok$1.25$0.50
Cost per solved task$0.14Not computable
Context window400K1.05M