# Amazon S3: how AI models rank it, September 2026

IT AI Recommendation Index, September 2026 Edition. Named in 65 judge labels across 2 categories by 12 of 12 models. Page: https://it-ai-index.com/vendors/amazon-s3/

## Standing by category

| Category | Share | Rank | Negative rate | Labels |
|---|---|---|---|---|
| Object storage | 15% | 3 | 23% | 60 |
| Backup and disaster recovery | 0% | 104 | 40% | 5 |

## What the models said for it

- "Choose AWS S3 if you need the broadest compatibility, have an existing AWS footprint, or require very granular control over storage tiers" (Qwen 3.7 Flash, Object storage)
- "Amazon S3 and Microsoft Azure Blob Storage are the top choices due to their scalability, security, and ecosystem integration." (Mistral Small, Object storage)
- "Choose Amazon S3 if you want the most mature platform, widest feature set, and strongest enterprise ecosystem." (GPT-5.4 mini, Object storage)
- "For Enterprise/Critical Apps: Stick to AWS S3, but set up billing alerts immediately to monitor egress costs." (Qwen 3.7 Flash, Object storage)

## And against it

- "avoid for frequently changing data because they have 90-day and 180-day minimums, respectively" (Perplexity Sonar, Object storage)
- "What to avoid on a budget ... ~$23/TB/month plus ~$90/TB in egress fees" (DeepSeek V4 Flash, Object storage)
- "avoid standard AWS S3, Microsoft Azure, or Google Cloud for backup storage" (Gemini 3.5 Flash, Backup and DR)
- "4-10x more expensive | Avoid unless locked in" (Grok 4.1 Fast, Object storage)

## Record

- Method: https://it-ai-index.com/methodology/
- Raw judge labels and full responses: https://it-ai-index.com/data/
- License: CC BY 4.0. Cite as IT AI Recommendation Index, September 2026 Edition, it-ai-index.com.