Claude Fable 5 vs GPT-5.4

Claude Fable 5 against GPT-5.4
Claude Fable 5GPT-5.4
Coding index79.364.4
Benchmarks behind it Verified, 6 benchmarks Verified, 3 benchmarks
Output $/Mtok$50.00$15.00
Cost per solved task$2.16$1.02
Context window1M1.05M