MiniLM NLI Zero-Shot Classifier enables label-free text classification using natural language inference. At 71MB, it runs on CPU with sub-100ms latency and handles any set of candidate labels without fine-tuning. Built on cross-encoder/nli-MiniLM2-L6-H768 from sentence-transformers, it achieves strong zero-shot accuracy on topic classification, intent detection, and content moderation tasks. Apache-2.0 licensed, fully commercial-safe.
Highlights
71MB CPU model - zero-shot classify any text without training data
6M monthly downloads - proven production NLI reliability
Apache-2.0 - fully commercial-safe for any use case
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You pay by the hour for model inference, billed per host hour on the ml.m5.xlarge instance type. Two options run on the same instance but differ by processing mode. The real-time option handles live, on-demand classification requests. The batch option processes grouped inputs together in scheduled jobs. Both scale with how many hours you run the instance, so your cost grows with usage time rather than a fixed subscription. Pick the mode that matches your workload; there are no tiers or commitments beyond hourly usage.
Top-of-mind questions for buyers
What hardware do I get with the ml.m5.xlarge instance for these inference options?
You run on the ml.m5.xlarge instance type, a CPU-based SageMaker instance. This model is built for CPU classification, so no GPU is required. You are billed per host hour the instance runs, regardless of how many requests it processes during that hour.
Am I charged when the instance sits idle or is stopped?
Charges accrue per host hour while the SageMaker instance runs. A stopped instance stops software metering. However, AWS may still bill underlying infrastructure or storage fees separately. The software charge here meters running host time only, not the number of classification requests.
How does the real-time mode differ from the batch mode for my bill?
Both meter the same per-host-hour rate on the same instance type. Real-time keeps the instance running to answer live requests, so it accrues hours continuously. Batch runs scheduled jobs, so it accrues hours only during those job windows. Choose real-time for on-demand needs, batch for grouped inputs.
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An Amazon SageMaker model package is a pre-trained machine learning model ready to use without additional training. Use the model package to create a model on Amazon SageMaker for real-time inference or batch processing. Amazon SageMaker is a fully managed platform for building, training, and deploying machine learning models at scale.
Deploy the model on Amazon SageMaker AI using the following options:
Real-time inference
Deploy the model as an API endpoint for your applications. When you send data to the endpoint, SageMaker processes it and returns results by API response. The endpoint runs continuously until you delete it. You're billed for software and SageMaker infrastructure costs while the endpoint runs. AWS Marketplace models don't support Amazon SageMaker Asynchronous Inference. For more information, see Deploy models for real-time inference .
Batch transform
Deploy the model to process batches of data stored in Amazon Simple Storage Service (Amazon S3). SageMaker runs the job, processes your data, and returns results to Amazon S3. When complete, SageMaker stops the model. You're billed for software and SageMaker infrastructure costs only during the batch job. Duration depends on your model, instance type, and dataset size. AWS Marketplace models don't support Amazon SageMaker Asynchronous Inference. For more information, see Batch transform for inference with Amazon SageMaker AI .
Version release notes
Initial release
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Sample notebooks
Inputs
Summary
6M monthly downloads. 71MB zero-shot text classifier - assign any label without training data. CPU-optimized, Apache-2.0.
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facebook/bart-large-mnli on SageMaker. MNLI accuracy 89.9. Classify any text into any custom category set with zero training data -- tickets, contracts, documents. $0.10/hr flat.
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