AIFIRST Claude Code 2.1.198 review: Sonnet 5 becomes default model
The brief
2.1.197 makes Sonnet 5 the default model.
Key points
- 2.1.198 adds background agent auto-PR in worktrees, agent notification hooks, thinking-config inheritance for subagents, and gateway failover improvements.
Sources
- aifirst-reviewgithub.com
- Source codegithub.com