alt Hacker NewsFable/mythos are the first models from anthropic that hide 100% of reasoning tokens. So it seems to me like we're about to get a lot more data about to what extent Chinese model progress has been a consequence of distillation techniques.
Fable/mythos are the first models from anthropic that hide 100% of reasoning tokens. So it seems to me like we're about to get a lot more data about to what extent Chinese model progress has been a consequence of distillation techniques.
This isn't correct, Claude hasn't displayed the raw chain of thought for any of the Claude 4 series models, which were released in May 2025. Sonnet 4.6/Opus 4.8 only display a summarized chain of thought, which is produced by a secondary model. Fable displays its summarized chain of thought in the same manner.
The thinking traces disappeared because Anthropic changed them to be hidden by default. The rationale for hiding it was that most people don't look at the thinking traces https://news.ycombinator.com/item?id=47664442 . You can reenable thinking traces in Claude code settings with the flag showThinkingSummaries: true.