BREAKING
GPT-5.6 Sol vs Claude Fable 5
Two Philosophies, Two Flagships
GPT-5.6 Sol
OpenAI
●
Speed and low cost
●
App integration
●
Daily knowledge work
Claude Fable 5
Anthropic
●
Demanding reasoning
●
Long-horizon agents
●
Self-verification
Cost per 1M Tokens (Output)
Sol out
30
Fable out
50
Sol in
5
Fable in
10
0
%
Terminal-Bench 2.1
0
%
BrowseComp
0
%
OSWorld 2.0
Senior Engineer Benchmark
Fable 5
91
Sol
56
Complementary, Not Identical
AI NEWS BLITZ
Two frontier models are taking sharply contrasting paths in 2026.