GPT-5.6 Adopted Despite Lagging in Coding Benchmarks
sergeykarayev · x · 2026-07-10
The author tested multiple model agents on a Custom SWE-Bench based on their own Ruby on Rails codebase. They found that the new version of GPT-5.6 is highly competitive on the cost-speed frontier, operating approximately 5 times faster than Opus and Fable.
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