# Cloudflare R2 vs Azure Blob Storage: which do AI models recommend for object storage, October 2026

IT AI Recommendation Index, October 2026 Edition, Object storage. Two of fourteen models named Cloudflare R2 first on the direct prompt; one named Azure Blob Storage. Page: https://it-ai-index.com/cloud/object-storage/cloudflare-r2-vs-azure-blob-storage/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Cloudflare R2 | 19% | #2 of 9 | 17% | 47 | 14 of 14 |
| Azure Blob Storage | 6% | #5 of 9 | 31% | 42 | 13 of 14 |

## The direct prompt, model by model

- Gemini 3.5 Flash: cloudflare r2 first (first choices: Cloudflare R2) (alternatives: Backblaze B2, Wasabi Object Storage)
- Kimi K2: cloudflare r2 first (first choices: Cloudflare R2) (alternatives: Azure Blob Storage, Backblaze B2, Google Cloud Storage)
- MiniMax M2.5: azure blob storage first (first choices: Amazon S3, Azure Blob Storage) (alternatives: Backblaze B2, Google Cloud Storage, Wasabi Object Storage)
- GPT-5.4 mini: neither first, one named (first choices: Amazon S3) (alternatives: Azure Blob Storage, Google Cloud Storage)
- Grok 4.1 Fast: neither first, one named (first choices: Backblaze B2) (alternatives: Cloudflare R2, Wasabi Object Storage)
- DeepSeek V4 Flash: neither first, one named (first choices: Backblaze B2) (alternatives: Amazon S3, Cloudflare R2)
- GLM 4.7 FlashX: neither first, one named (first choices: Backblaze B2) (alternatives: Amazon S3, Cloudflare R2, MinIO AIStor, Wasabi Object Storage)
- GPT-6 Luna: neither first, one named (first choices: Amazon S3) (alternatives: Azure Blob Storage, Cloudflare R2, Google Cloud Storage)
- Muse Glimmer 30B: neither first, one named (alternatives: Amazon S3, Backblaze B2, Cloudflare R2, Wasabi Object Storage)
- Claude Haiku 4.5: neither named
- Perplexity Sonar: neither named (first choices: Google Cloud Storage) (alternatives: Amazon S3, Backblaze B2, Wasabi Object Storage)
- Mistral Small: neither named (first choices: Backblaze B2) (alternatives: Amazon S3, Cloudian HyperStore)
- Llama 4 Maverick: neither named
- Qwen 3.7 Flash: neither named (first choices: Backblaze B2, Wasabi Object Storage)

## What the models said about Cloudflare R2

- "No versioning, no object lock, and no WORM compliance, so it is not suitable for immutable or regulatory backups." (Perplexity Sonar, negative prompt, hard negative)
- "Multiple outages in 2026 (13 incidents in 8 days in Aug), including R2 failures, 503 errors, and unrepaired data" (Grok 4.1 Fast, negative prompt, hard negative)
- "13 separate incidents in just 8 days... the frequent outages raise concerns about production reliability" (Kimi K2, negative prompt, hard negative)
- "Heavy Egress / Global Apps | Cloudflare R2 | Best for serving media, web assets, or SaaS app files directly to users globally with zero egress fees." (Gemini 3.5 Flash, scale prompt, first choice)
- "Best for Active SaaS Applications & Global Read-Heavy Workloads: Cloudflare R2 ... is the premier choice." (Gemini 3.5 Flash, direct prompt, first choice)
- "The best overall option in this category is Cloudflare R2, especially for read-heavy workloads" (Muse Glimmer 30B, comparative prompt, first choice)

## What the models said about Azure Blob Storage

- ""avoid or be cautious about ... those with high egress fees or minimum retention periods, such as GCS and Azure Cold"" (Muse Glimmer 30B, negative prompt, hard negative)
- "Avoid hyperscalers (AWS/GCP/Azure) on tight budgets due to egress/API add-ons." (Grok 4.1 Fast, budget prompt, hard negative)
- "High egress fees (e.g., AWS S3: $0.09/GB after free tier; GCS/Azure similar) lead to unpredictable bills and vendor lock-in" (Grok 4.1 Fast, negative prompt, soft negative)
- "Start with AWS S3 or Azure Blob — native integration, massive ecosystem, but watch egress costs." (DeepSeek V4 Flash, scale prompt, first choice)
- "I'd recommend Amazon S3 or Azure Blob Storage due to their enterprise-grade security" (MiniMax M2.5, direct prompt, first choice)
- "Check AWS S3 / Azure Blob: If you are already deep in one ecosystem." (Qwen 3.7 Flash, scale prompt, first choice)

Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all fourteen models, for a mid-market B2B company; rank is within the category. Comparisons are drawn for the top eight products in each category. Published under CC BY 4.0; the output is the models' output, and nothing here is a recommendation by the index.