tensorzero
TensorZero creates a feedback loop for optimizing LLM applications — turning production data into smarter, faster, and cheaper models.
Stars: 1963
TensorZero is an open-source platform that helps LLM applications graduate from API wrappers into defensible AI products. It enables a data & learning flywheel for LLMs by unifying inference, observability, optimization, and experimentation. The platform includes a high-performance model gateway, structured schema-based inference, observability, experimentation, and data warehouse for analytics. TensorZero Recipes optimize prompts and models, and the platform supports experimentation features and GitOps orchestration for deployment.
README:
TensorZero creates a feedback loop for optimizing LLM applications — turning production data into smarter, faster, and cheaper models.
- Integrate our model gateway
- Send metrics or feedback
- Optimize prompts, models, and inference strategies
- Watch your LLMs improve over time
It provides a data & learning flywheel for LLMs by unifying:
- [x] Inference: one API for all LLMs, with <1ms P99 overhead
- [x] Observability: inference & feedback → your database
- [x] Optimization: from prompts to fine-tuning and RL (& even 🍓? →)
- [x] Experimentation: built-in A/B testing, routing, fallbacks
Website
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Docs
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Twitter
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Slack
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Discord
Quick Start (5min)
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Comprehensive Tutorial
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Deployment Guide
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API Reference
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Configuration Reference
[!NOTE]
Watch LLMs get better at data extraction in real time with TensorZero!
Dynamic in-context learning (DICL) is a powerful inference-time optimization available out of the box with TensorZero. It enhances LLM performance by automatically incorporating relevant historical examples into the prompt, without the need for model fine-tuning.
https://github.com/user-attachments/assets/4df1022e-886e-48c2-8f79-6af3cdad79cb
- The TensorZero Gateway is a high-performance model gateway written in Rust 🦀 that provides a unified API interface for all major LLM providers, allowing for seamless cross-platform integration and fallbacks.
- It handles structured schema-based inference with <1ms P99 latency overhead (see Benchmarks) and built-in observability, experimentation, and inference-time optimizations.
- It also collects downstream metrics and feedback associated with these inferences, with first-class support for multi-step LLM systems.
- Everything is stored in a ClickHouse data warehouse that you control for real-time, scalable, and developer-friendly analytics.
- Over time, TensorZero Recipes leverage this structured dataset to optimize your prompts and models: run pre-built recipes for common workflows like fine-tuning, or create your own with complete flexibility using any language and platform.
- Finally, the gateway's experimentation features and GitOps orchestration enable you to iterate and deploy with confidence, be it a single LLM or thousands of LLMs.
Our goal is to help engineers build, manage, and optimize the next generation of LLM applications: systems that learn from real-world experience. Read more about our Vision & Roadmap.
Start building today. The Quick Start shows it's easy to set up an LLM application with TensorZero. If you want to dive deeper, the Tutorial teaches how to build a simple chatbot, an email copilot, a weather RAG system, and a structured data extraction pipeline.
Questions? Ask us on Slack or Discord.
Using TensorZero at work? Email us at [email protected] to set up a Slack or Teams channel with your team (free).
Work with us. We're hiring in NYC. We'd also welcome open-source contributions!
We are working on a series of complete runnable examples illustrating TensorZero's data & learning flywheel.
Writing Haikus to Satisfy a Judge with Hidden Preferences
This example fine-tunes GPT-4o Mini to generate haikus tailored to a specific taste. You'll see TensorZero's "data flywheel in a box" in action: better variants leads to better data, and better data leads to better variants. You'll see progress by fine-tuning the LLM multiple times.
Improving Data Extraction (NER) by Fine-Tuning a Llama 3 Model
This example shows that an optimized Llama 3.1 8B model can be trained to outperform GPT-4o on a Named Entity Recognition (NER) task using a small amount of training data, and served by Fireworks at a fraction of the cost and latency.
Improving LLM Chess Ability with Best-of-N Sampling
This example showcases how best-of-N sampling can significantly enhance an LLM's chess-playing abilities by selecting the most promising moves from multiple generated options.
Improving Data Extraction (NER) with Dynamic In-Context Learning
This example demonstrates how Dynamic In-Context Learning (DICL) can enhance Named Entity Recognition (NER) performance by leveraging relevant historical examples to improve data extraction accuracy and consistency without having to fine-tune a model.
Improving Math Reasoning with a Custom Recipe for Automated Prompt Engineering (DSPy)
TensorZero provides a number of pre-built optimization recipes covering common LLM engineering workflows. But you can also easily create your own recipes and workflows! This example shows how to optimize a TensorZero function using an arbitrary tool — here, DSPy.
& many more on the way!
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