Artificial Analysis Intelligence Index

Meta released Muse Ember, its smallest and most efficient model to date, targeting high-frequency agent workloads such as tool calling, coding subtasks and long-document parsing. On the Artificial Analysis intelligence index it scores about 36 at top reasoning effort, matching Claude Haiku 5.5 and beating GPT-6 Luna, while costing roughly one-third per task at about $0.136, placing it on a favorable efficiency frontier. It is available now via Meta Model API and Muse Code, with more efficient models reportedly in training.

Anthropic released two flagship models, Claude Fable 5.2 and Mythos 5.2, targeting the most demanding technical tasks just ahead of its IPO. Fable 5.2 tops the Artificial Analysis Intelligence Index v5 with 65 points, five ahead of Gemini 4 Carbon and 15 above its predecessor Fable 5.1, while still leading at lower compute tiers with 62 points and far fewer tokens. Anthropic says it deliberately withheld capabilities that could directly accelerate AI development.