Sonnet 4.5 Reportedly Removed for Some Claude Users — 73 Upvotes, 92 Comments Debating Model Deprecation

r/ClaudeAI·low signal

A r/ClaudeAI post with 73 upvotes and 92 comments reports that Sonnet 4.5 has been removed as an option for some users, with a migration message appearing mid-conversation. The comment-to-upvote ratio of 1.26 — the highest in today's batch — indicates significant user concern. No official Anthropic deprecation announcement has been confirmed; the thread may reflect a gradual model rollover or A/B testing rather than a blanket removal.