Users Find Claude's New Checkpoint Seems to Know Events Through Mid-2026
ChrisGPT · x · 2026-11-08
User ChrisGPT reports testing Anthropic's new Fable/Opus checkpoint: asked where Karpathy went in 2026, the new checkpoint gave an answer — and a screenshot shows the model describing its training data as running "through about mid 2026," calling it a fuzzy recollection rather than retrieved info.
- Also reproduced on Sonnet 5.5 Extra high across three different accounts, suggesting Sonnet Extra is being routed to the newest checkpoint more frequently
- Opus mostly knew nothing; reproduced once on a third account
- Unverified user-side observation hinting Anthropic may be silently canarying a new checkpoint
Related event: Claude Checkpoint Leaks Karpathy's Alleged Anthropic Move Offline(4 posts)→
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