Claude Sonnet 5: what 38 developers actually say.
38 Hacker News opinions from 37 developers, Nov 2025 – Nov 2026. 33 come from people who say they use it. Here is what they praise, what they complain about, and who switched.
The case for Claude Sonnet 5, in one paragraph.
Claude Sonnet 5 earns 61% approval across 38 opinions. Developers are divided on it. In the last 90 days it sits at 41%.
Pick it if you
- Work on large repos and need strong code quality
- Need an agent that persists when a task stalls
- Need reliable instruction following in long contexts
Look elsewhere if you
- Need low latency or fast turnaround
- Need predictable token costs
- Do most of your coding inside an IDE on a budget
Where it wins and loses.
Mentions across 38 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 | 9 | 5 | 14 |
How opinion has moved.
Monthly approval, Jun 2026 – Sep 2026. Bars show opinion volume; low-volume months are still included but faded.
View data table
| Month | Approval | Opinions |
|---|---|---|
| Jun 2026 | 75% | 4 |
| Jul 2026 | 76% | 17 |
| Aug 2026 | 36% | 11 |
| Sep 2026 | 50% | 6 |
What developers say.
Summaries are paraphrased. Each links to the original Hacker News comment.
Praise
4 selectedScored higher than Sonnet 5.5 on their esoteric-language benchmark, persisting more instead of asking questions.
Claude Sonnet 5 finished the same cleanup task that DeepSeek V4 Pro stalled on.
Using Sonnet 5 on a large porting project and says it is doing a good job.
Chinese models felt significantly dumber than Claude Sonnet 5 when tried in Pi.
Complaints
4 selectedSonnet 5 burned $400 on one incident and needed many prompts to tune alerts.
Sonnet 5 is not usable for coding.
Sonnet 5 went on a long side quest through Git history for a one-line doc change.
Sonnet 5 trusted a pasted error and chased a wrong lead, ignoring the user's mistake.
Questions developers ask.
Is Claude Sonnet 5 worth it?
Is Claude Sonnet 5 better than Claude Opus 4.8?
Is Claude Sonnet 5 good for coding?
The data behind this page.
Claude Sonnet 5 has 61% approval across 38 opinions from 37 authors, a mildly positive but split result. The 90-day score is 41%, and the monthly trend fell from 75% in June and 76% in July to 36% in August, then rose to 50% in September. Code quality is the main strength at 9 positive and 5 negative mentions, and autonomy leans positive at 5 to 2. Cost is 3 positive and 5 negative, and speed is 0 positive and 3 negative; the monthly samples are small.
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.