# Amazon ECR vs Azure Container Registry: which do AI models recommend for artifact registries, October 2026

IT AI Recommendation Index, October 2026 Edition, Artifact and container registries. Zero of fourteen models named Amazon ECR first on the direct prompt; zero named Azure Container Registry. Page: https://it-ai-index.com/developer/artifact-and-container-registries/amazon-ecr-vs-azure-container-registry/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Amazon ECR | 8% | #5 of 16 | 0% | 12 | 8 of 14 |
| Azure Container Registry | 5% | #6 of 16 | 3% | 33 | 12 of 14 |

## The direct prompt, model by model

- Claude Haiku 4.5: neither named
- GPT-5.4 mini: neither named (first choices: Sonatype Nexus Repository) (alternatives: AWS CodeArtifact, JFrog Artifactory)
- Gemini 3.5 Flash: neither named (first choices: Cloudsmith) (alternatives: AWS CodeArtifact, Azure Artifacts, GitLab Package Registry, Google Artifact Registry, Sonatype Lifecycle)
- Perplexity Sonar: neither named (first choices: JFrog Artifactory) (alternatives: Cloudsmith, Sonatype Nexus Repository)
- Grok 4.1 Fast: neither named (first choices: Cloudsmith) (alternatives: AWS CodeArtifact)
- Mistral Small: neither named (first choices: Cloudsmith) (alternatives: AWS, Google Cloud, Packagecloud)
- DeepSeek V4 Flash: neither named (first choices: Sonatype Nexus Repository) (alternatives: Azure Artifacts, Cloudsmith)
- Llama 4 Maverick: neither named (first choices: Cloudsmith) (alternatives: Packagecloud)
- Qwen 3.7 Flash: neither named (first choices: JFrog Artifactory) (alternatives: AWS CodeArtifact, Azure Artifacts, Sonatype Lifecycle)
- Kimi K2: neither named (first choices: GitHub Packages) (alternatives: AWS CodeArtifact, Azure Artifacts, Sonatype Nexus Repository)
- GLM 4.7 FlashX: neither named (first choices: Sonatype Nexus Repository) (alternatives: Cloudsmith, Harbor, JFrog Artifactory)
- MiniMax M2.5: neither named (first choices: Sonatype Nexus Repository) (alternatives: AWS CodeArtifact, Cloudsmith, JFrog Artifactory)
- GPT-6 Luna: neither named (first choices: Cloudsmith) (alternatives: AWS CodeArtifact, JFrog Artifactory, Sonatype Nexus Repository)
- Muse Glimmer 30B: neither named (first choices: Sonatype Nexus Repository) (alternatives: CloudRepo, Cloudsmith, JFrog Artifactory)

## What the models said about Amazon ECR

- "If you want a single default recommendation without more context, I'd lean toward Amazon ECR for a mid-sized B2B company" (GPT-5.4 mini, paraphrase prompt, first choice)
- "AWS Elastic Container Registry (ECR) is the obvious choice if you're running on AWS" (Claude Haiku 4.5, paraphrase prompt, first choice)
- "For most mid-sized B2B companies, I'd start with Amazon ECR if you're on AWS" (GLM 4.7 FlashX, paraphrase prompt, first choice)

## What the models said about Azure Container Registry

- "Critical security concern discovered Dec 2024" (DeepSeek V4 Flash, negative prompt, soft negative)
- "Tier 1 (Trusted): Enterprise Private Registries (AWS ECR, Google GCR/AAR, Azure ACR) configured with RBAC and Scanning." (Qwen 3.7 Flash, negative prompt, first choice)
- "Prefer private/managed registries: Use AWS ECR, Google Artifact Registry, Azure Container Registry (ACR)" (Grok 4.1 Fast, negative prompt, first choice)
- "Private registries: AWS ECR, Azure Container Registry, Google Artifact Registry" (MiniMax M2.5, negative 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.