GPT-5.6 Beats Claude Fable 5 at Coding — For 1/3 the Cost
OpenAI shipped GPT-5.6. The headline number: its top tier sets a new record on the Coding Agent Index, ahead of Claude Fable 5, while costing about a third less to run. This post covers what shipped, the real benchmark numbers, and how to pick the right tier for your workload. ...