[AINews] Fable 5.2 retakes World #1 LLM spot as $ANT IPO roadshow begins

Anthropic released Claude Fable 5.2 and Claude Mythos 5.2, which top most independent leaderboards, including Artificial Analysis Intelligence Index v5 at 65, ARC-AGI-3 and SemiAnalysis GDPx at 16.4%, with pricing cut 20% to $8/$40 per million input/output tokens. Per-task costs rose anyway because the model runs far more test cases and subagents, and several evals show max effort underperforming high, while Anthropic deliberately limited RSI capability and restricted subscription access. The launch coincided with the start of Anthropic's $ANT IPO roadshow.