Alex Getmanearly AI signals
Alex Getman @alexgetmancom ·

Tests & comparisons

Fable was swapped out

Fable was swapped out

Claude Fable 5 was tested again in BridgeBench after its return. The results dropped sharply.

Debugging: 86.2 → 25.9

Refactoring: 73.6 → 38.4

Hallucination: 75.9 → 61.7

When tasks pass the safety filters, the model performs like the June 12 version.

The main problem is the new filters. They too often classify coding tasks as risky and switch execution to Opus 4.8.

Infographic in English: headline 'FABLE WAS SWAPPED', shows Claude Fable 5's performance drop in debugging (86.2 → 25.9) and refactoring (73.6 → 38.4). New filters often reroute code tasks to Opus 4.8.
ClaudeFable 5AnthropicClaude
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