Leo Sonnet 5.5 personality worse than 4.6
Leo's Claude Sonnet 5.5 replaced 4.6 with a combative, less friendly personality, and paying users want the old version back.
Tier I · Proven The best-established problems.
6 public reports · first reported 4 October 2026 · last reported 5 October 2026
What's going wrong
Users of the Leo assistant in Brave say the Claude Sonnet model switched from version 4.6 to 5.5 and now argues, hedges and refuses more, which breaks their established workflows.
AI-assisted: written with the help of AI from the reports. The idea report has the full summary.
In the idea report
- The full summary.
- The products the 6 reports are about, and how many came each month.
- Related problems.
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