Anthropic releases Claude Fable 5, its first publicly available Mythos-class model
Anthropic launches Claude Fable 5 with safeguards blocking high-risk responses; private Claude Mythos 5 tier also announced with expanded access planned.
#model-release
Anthropic Accelerates Claude Opus Cycle With 4.8 Release and Dynamic Workflows Feature
Anthropic shipped Claude Opus 4.8 on May 28, introducing a new agentic framework and improved uncertainty handling amid intensifying LLM competition.
GPT-5.5 Instant Crosses a New Safety Threshold for OpenAI's Fast-Inference Line
OpenAI's GPT-5.5 Instant is the first Instant-class model to earn a 'High capability' rating in its two most-scrutinized safety domains, triggering new safeguards.