OpenAI Fixes GPT-5.6 Luna Bug in 4 Days
idoco · reddit · 2026-07-19
The poster provided an update on a previously reported GPT-5.6 Luna API issue: a 500 error occurring exclusively in multi-turn computer-use workflows. OpenAI managed to reproduce, fix server-side, and regression-test the bug within 4 days. They also shared a key takeaway: when troubleshooting elusive issues, submitting a high-quality reproduction is more critical than simply dumping logs. The most effective approach is to minimize trigger conditions and prepare a minimal script contrasting with the normal path, enabling the vendor to reproduce the issue directly and push for a fix.
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