Findings
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[1] 2026-09-28 v2.1.284
What's changed Added Claude Sonnet 5.5 (claude-sonnet-5-5), now the default Sonnet model on the Anthropic API — 1M context, $2/$10 per Mtok with $0.20/Mtok cache reads Added a "Yes, but ask again next time" answer to auto mode's prompt before a read… not repeating text typed very fast (for example over ssh or in tmux) or pasted without bracketed paste, and leaving the prompt in INSERT mode after repeating a change with nothing typed (such as cw then Esc) Fixed vim mode… Changed the notice shown when a Sonnet model's safeguards flag a message to explain why it happened and to offer editing and retrying Changed safety-related model switches in sessions that pin an Opus model with ANTHROPIC_DEFAULT_OPUS_MODEL or modelOverrides: on the…
Where Kimbodo Comes In
Kimbodo builds and operates this in production for businesses — see our Enterprise AI Agent Development practice, or Scope an Enterprise AI Agent.
Sources
- [1] v2.1.284
