YZ Index · AI Model Change Intelligence

Which AI model should you use today?
We benchmark them every week.

11 models · 212 questions randomly sampled · Real code execution · Citation verification · Rolling average rankings · Don't trust press releases, check continuous performance.

Code Sandbox Execution Citation Accuracy Check Statistical Significance Ranking No Vendor Sponsorship
Who to Use Right Now
#1 Overall (Rolling Average) Grok 3
Biggest Rise This Week 文心一言 4.0 +15
Latest Benchmark 2026-04-27 SGT
judge v6

Who to Use Right Now

Start with the overall ranking, then drill into the dimension you care about.

The full leaderboard shows not just who's leading, but how stable that lead is. View Full Leaderboard

Who's Up, Who's Down

One-time spikes don't count. We care about whether sustained performance has shifted.

Biggest change this week: 文心一言 4.0 rose 15 pts。
View Full Change Report
Biggest Gain
文心一言 4.0
+15
Incident Reports
This week 2 incidents
Pricing Changes
0 updates

Don't just look at the overall score — consider your use case

Top Pick
豆包 Pro
92.2 pts
Runner-up
Gemini 2.5 Pro
89.4 pts
Third Choice
Grok 3
88.9 pts
Top Pick
Gemini 2.5 Pro
47.2 pts
Runner-up
Claude Opus 4.6
46.3 pts
Third Choice
豆包 Pro
46.3 pts
Top Pick
Grok 3
84.4 pts
Runner-up
Claude Sonnet 4.6
81.1 pts
Third Choice
Claude Opus 4.6
79.7 pts
Top Pick
DeepSeek V3
99.7 pts
Runner-up
文心一言 4.0
98.5 pts
Third Choice
豆包 Pro
93 pts
Top Pick
豆包 Pro
38.9 pts
Runner-up
Gemini 2.5 Pro
36.6 pts
Third Choice
Claude Opus 4.6
36.6 pts

View Full Recommendations by Use Case

Worth reading today — beyond the hype

We only feature content that impacts capability, pricing, stability, or model selection.

Featured
News
Musk and Page's AI Safety Dispute: When "Speciesism" Becomes a Point of Divergence for Tech Giants
In recent OpenAI-related court proceedings, Elon Musk revealed that Google co-founder Larry Page labeled him a "speciesist" for his AI safety concerns, highlighting a fundamental ideological divide between the two tech giants. This disclosure has sparked intense discussions on the future direction of AI development, pitting human-centric safety against views of AI as an independent evolutionary form.
Featured
News
Apple iOS 27 Heavyweight Preview: AI Photo Editing Features Fully Revolutionized, Challenging Android's Dominant Position
Apple is set to introduce groundbreaking AI photo editing features in iOS 27 and macOS 27, offering users advanced image processing capabilities like smart expansion, AI enhancement, and image reconstruction, all powered by Apple Intelligence with on-device processing for privacy. This move aims to counter Android's lead in AI photography and reshape the market competition.
Featured
News
当机器人迎来ChatGPT时刻,别忘了这些钳子
从分拣鸡块到拧灯泡,Eka公司的机器人表现出了惊人的逼真度。但这是否意味着它们真正拥有了物理智能?本文深入探讨了机器人技术的最新突破,以及这些“灵巧钳子”如何预示着一个新时代的到来——当机器人学会像人类一样感知和操作世界时,我们该如何理解这种“智能”的本质?
News
前推特CEO创立的AI代理公司五个月估值翻倍至20亿美元
由前Twitter CEO Parag Agrawal创立的AI代理初创公司Parallel Web Systems,在短短五个月内再次完成1亿美元融资,由红杉资本领投,估值飙升至20亿美元。这家专注于AI代理工具的公司,凭借其创新的技术和对企业级AI应用的精准定位,迅速成为资本市场的宠儿。本文将深入分析其崛起背后的行业逻辑与市场前景。
News
AI视频只是前奏?Runway CEO预言世界模型是下一站
AI生成视频从新奇事物迅速演变为创意工具,Runway公司身处变革前沿。这家纽约初创公司已融资近8.6亿美元,估值达53亿美元,其模型正与谷歌、OpenAI等巨头正面交锋。CEO克里斯托瓦尔·巴伦苏埃拉认为,AI视频只是通向“世界模型”的序章——未来的AI不仅能生成画面,更能理解物理规律、预测行动后果,从而重塑电影制作、游戏开发和机器人技术。
News
OpenAI Codex指令暗藏玄机:禁止提及地精
Ars Technica报道,OpenAI的Codex系统提示中包含一条明确指令,要求模型“永远不要谈论地精”,同时还要求其表现得“拥有丰富的内心世界”。这一发现引发了对AI系统安全与行为控制的讨论,揭示了开发者如何通过隐藏指令塑造AI的响应。

Not all AI news is worth reading. What matters is what changes your judgment. View All News

Why This Leaderboard Is Worth Your Attention

Not because we're loud, but because our methods are open, rules are fixed, and results are traceable.

Real Code Execution
Looking like it can code isn't enough. We run the code in a sandbox. If it doesn't pass, it's zero.
Citation Verification
For long-document questions, we don't just check if the answer looks right — we verify citations trace back to the source.
Statistical Rankings
We don't judge on a single run. Rankings are based on rolling averages, avoiding luck-driven fluctuations.
No Sponsored Benchmarks
No co-evaluations, no pre-test consultations, no favoritism. Whatever the results are, that's what we publish.

View Methodology

The AI world changes daily — you need a reliable source

3 curated picks daily, weekly index changes, instant alerts for incidents and price shifts. Free, no ads, unsubscribe anytime.

  • Daily Picks — From the flood of AI news, we pick the 3 that truly matter
  • YZ Index Weekly — Who's up, who's down — one email covers it all
  • Model Incident Alerts — When a model you use has an issue, know immediately
  • Price Change Notifications — API price changes — don't find out from the bill
Free | No Ads | No Sponsored Content | Unsubscribe Anytime

Want deeper analysis? Go further.

The leaderboard answers "who's stronger." Research Lab answers "why." Model safety, edge deployment, performance teardowns — not rehashing papers, but conclusions from our own testing.

Enter Research Lab