GPT-5.6 Task Failures: 20% Attributed to Regressions

zainhas · x · 2026-08-08

The GPT-5.6 model family has a tendency to introduce regressions, accounting for 20% of its failed tasks. This behavior is not observed in models like Fable 5 or K3. This breakdown can be identified by examining the failed tasks in DeepSWE.

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