User says Claude Opus 5 fixed a bug that Codex 5.5 could not identify
It-zubair-huss · reddit · 2026-07-26
A user says Claude Opus 5 solved a client bug that Codex 5.5 could not even identify.
What happened
- They spent a week stuck on a client bug
- They tried fixing it themselves and failed
- Codex 5.5 still could not pinpoint the issue
- Opus 5 immediately spotted the problem and fixed it
The takeaway
The poster says they were genuinely impressed and that usage has been capped for three days, but the model was still worth it. The post is a concise anecdote about the strength of Opus 5 on real debugging work.
More from Models
- Liang says DeepSeek is built by ordinary people focused on one extraordinary goal: AGI — FinanceYF5 · 2026-07-26
- DeepSeek says it will monetize, but cost efficiency matters more than profit maximization — FinanceYF5 · 2026-07-26
- DeepSeek’s Wenfeng Liang says restraint, open source, and low cost are the path to AGI — FinanceYF5 · 2026-07-26
- After two days of testing, antirez says Opus 5 closes the gap but still doesn't beat Sol — antirez · 2026-07-26
- XMihura says GLM 5.2 is already ahead of Opus 4, and collapse fears were wrong — yacineMTB · 2026-07-26
- OpenAI and Claude both ship voice-mode updates, but users wanted a flagship model — FinanceYF5 · 2026-07-26