Anthropic has released Claude Mythos 5.2 and Fable 5.2 with "improvements in areas like coding, reasoning, and vision," while cutting Fable's input price and claiming 30% faster responses . TechCrunch reports: It's Anthropic's first model release since the arrival of a third-party report from the assessment group METR, which suggested the lab might be approaching recursive self-improvement (RSI) -- or the ability for AI models to carry on model training independently. The METR report found internal models were speeding up Anthropic's AI progress by roughly 2x, although many uncertainties remain. Still, Anthropic's release notes significant ongoing challenges in accurately testing model capabilities. "Claude Mythos 5.2 and Fable 5.2 each voice suspicion that they are being evaluated more often than any of our recent models, which challenges our ability to assess how they will act in real-world settings.…