Anthropic ECI - October 2026 Fit (Haiku 5.5 System Card): leaderboard
Metric: AECI Score. Source: www-cdn.anthropic.com. Saturation forecast: Around December 2027. 15 models tracked.
Top models
| # | Model | Score |
|---|---|---|
| 1 | Claude Opus 5.5 | 174.56 |
| 2 | Claude Mythos 5.1 | 172.4 |
| 3 | Claude Sonnet 5.5 | 172.2 |
| 4 | Claude Opus 5 | 169.2 |
| 5 | Claude Mythos 5 | 168.5 |
| 6 | Claude Haiku 5.5 | 167.11 |
| 7 | Claude Mythos Preview | 165.5 |
| 8 | Claude Opus 4.6 | 157.1 |
| 9 | Claude Opus 4.5 | 152.2 |
| 10 | Claude Sonnet 4.5 | 147.8 |
| 11 | Claude Opus 4 | 144.7 |
| 12 | Claude 3.7 Sonnet | 141.6 |
| 13 | Claude 3.5 Sonnet (20241022) | 133.2 |
| 14 | Claude 3.5 Sonnet (20240620) | 130 |
| 15 | Claude 3 Opus | 124.6 |
Interactive version: theaggregate.ai/benchmark?slug=anthropic-eci-october-2026-fit-haiku-5-5-system-card · How It Works · Data refreshed daily, snapshot 2026-10-10.