AI Model Deprecations & Shutdown Schedule
Track official model retirements, shutdown countdown deadlines, and recommended migration alternatives before production pipelines break.
Claude Haiku 4.5 removed from Anthropic models documentation
The Claude Haiku 4.5 entry has been removed from Anthropic's models documentation page. This may indicate a deprecation, retirement, or documentation restructuring, but the diff provides no replacement or sunset details.
Anthropic introduces Claude Fable 5.1, replacing Fable 5
Anthropic's model overview now lists Claude Fable 5.1 as the top-tier model for demanding reasoning and long-horizon agentic work, replacing Claude Fable 5. The new model has a knowledge cutoff of Jun 2026 (vs Jan 2026 for Fable 5). API ID is claude-fable-5-1. This is a new model launch, not a break
Claude Opus 4.8 replaced by Claude Opus 5 in model table
Anthropic updated the models overview page, replacing Claude Opus 4.8 with Claude Opus 5 as the recommended model for complex agentic coding and enterprise work. The new model has a May 2026 knowledge cutoff (vs Jan 2026 for Opus 4.8). Users should migrate to the new model ID claude-opus-5.
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