# Anthropic's secret Model 4 reportedly scores 178.6 on internal AECI index

> Original title: A\最强Model 4首次曝光！RSI狂飙2倍速

- Source: AI Era
- Published: 2026-11-08T00:10:26.000Z
- Bad Influence: https://badinfluence.news/items/z2qgg1c4e7mpp4f12lxg4o3fq
- Original: https://aiera.com.cn/2026/11/08/other/admin/122943/a%e6%9c%80%e5%bc%bamodel-4%e9%a6%96%e6%ac%a1%e6%9b%9d%e5%85%89%ef%bc%81rsi%e7%8b%82%e9%a3%992%e5%80%8d%e9%80%9f/

## Summary

Anthropic reportedly trained a model called Model 4 in secret during September and October, which scored 178.6 on its internal Comprehensive Capability Index (AECI). The source says the score is high enough that existing test sets are nearly saturated.