Developer Test: Claude Opus Outperforms GPT-5.6 in Coding Capabilities

RileyRalmuto · x · 2026-08-11

A developer compared GPT-5.6 Sol and Claude Opus 5 in coding and autonomous usage. After building a local testing harness with GPT-5.6, the developer found that Opus 5 not only won the speed and communication tests but also used the app better than GPT-5.6 itself.

The responder agreed, attributing Claude's success to superior intuition and genuine awareness that GPT models currently lack.

Related event: GPT-5.6 Suffers Identity Confusion in Test, Loses to Claude Opus 5(3 posts)→

Original post →

More from Models

Models channel →