"Fable 5 isn't nerfed, it's SLAUGHTERED. the problem isn't even the model itself, but the hard guardrails Anthropic has set in place." — ℏεsam
FABLE 5 CAME BACK NERFED.
We re-ran the July 1st version of Claude Fable 5 on BridgeBench.
The results are brutal:
Debugging: 86.2 → 25.9 Refactoring: 73.6 → 38.4 Hallucination: 75.9 → 61.7
The new guardrails are kicking in on way too many tasks and falling back to Opus — BridgeMind
Source: https://x.com/bridgemindai/status/2072662214704533888
in case I wasn’t clear, this is a routing problem not the model itself. the routing classifiers which Anthropic mentioned will improve, are redirecting some of the requests to Opus 4.8 — ℏεsam