Claude Opus 5.5: what 186 developers actually say.
186 Hacker News opinions from 175 developers, Nov 2025 – Nov 2026. 148 come from people who say they use it. Here is what they praise, what they complain about, and who switched.
The case for Claude Opus 5.5, in one paragraph.
Claude Opus 5.5 earns 75% approval across 186 opinions. Developers praise its code quality. In the last 90 days it sits at 75%.
Pick it if you
- Want strong code quality on real projects
- Want an agent that works with little supervision
- Already work inside Claude Code
Look elsewhere if you
- Need predictable weekly usage
- Expect stable behavior across long sessions
- Documentation updates are a core task
Where it wins and loses.
Mentions across 186 opinions. Bars are counts, not votes; a tool can be both praised and criticized on the same topic.
View data table
| Topic | Praise | Complaints | Mentions |
|---|---|---|---|
| Code quality | 56 | 16 | 72 |
| Cost & pricing | 27 | 6 | 33 |
| Autonomy | 22 | 3 | 25 |
| Usage limits | 14 | 3 | 17 |
| Speed | 10 | 1 | 11 |
| Reliability | 4 | 9 | 13 |
How opinion has moved.
Monthly approval, Sep 2026 – Oct 2026. Bars show opinion volume; low-volume months are still included but faded.
Not enough monthly data for a trend yet.
What developers say.
Summaries are paraphrased. Each links to the original Hacker News comment.
Praise
4 selectedOpus 5.5 at high effort handles their multi-repo work and can drive phones via adb for testing.
Building a reliable IPTV app with Opus 5.5 works far better than anything else they have tried.
Opus 5.5 is unbeatable right now, with strong taste in the output it produces.
Opus 5.5 at medium effort is enough for most tasks, so high reasoning effort isn't needed.
Complaints
4 selectedOpus 5.5 misses details and needs rewrites, so humans are more trustworthy on some tasks.
Opus 5.5 refuses to write exploits against their own test infrastructure, citing safety.
Opus 5.5 insists on working alone rather than delegating to other agents for evaluation.
Opus 5.5 degrades over long sessions, forgetting instructions and previously given steps.
Questions developers ask.
Is Claude Opus 5.5 worth it?
Is Claude Opus 5.5 better than OpenAI Codex?
Is Claude Opus 5.5 reliable?
The data behind this page.
Developers give Claude Opus 5.5 a 75% approval score across 186 opinions from 175 authors, and 148 of those opinions are firsthand. Code quality drives most of that: 56 positive mentions against 16 negative. Cost and autonomy also get more praise than complaints, while reliability is the one net-negative aspect at 4 positive against 9 negative. Sentiment slips across recent months, from 78 in September 2026 to 73 in October to 70 in November, though November holds only 10 opinions.
Every number comes from public Hacker News comments collected through the HN Search API. A language model tagged each comment for sentiment, first-hand use, topic and switches; a human spot-checks samples. No vendor can pay for placement.
Get the monthly report
Which AI coding tools gained or lost developer approval on Hacker News, and why people switched. One email a month.