Anthropic's system card reveals it deliberately capped AI R&D capabilities in training
dejavucoder · x · 2026-11-10
Anthropic's system card for Claude Fable 5.2 / Mythos 5.2 discloses that during training it deliberately limited advances in capabilities that could most directly accelerate AI development: in accelerator kernel optimization and LLM architecture improvement, the new models only perform at about Opus 5.5 level. Agentic coding, hardware development, and interpretability research abilities were unaffected, no inference-time limits are applied, and a small set of sensitive topics transparently falls back to Opus 5. The poster taunts: "OpenAI, do something."
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