
Open-source LLM infrastructure for gateway, observability, optimization, and experimentation
TensorZero is an open-source LLMOps platform that unifies an LLM gateway, observability, optimization, evaluations, and experimentation into a single stack. Written in Rust for extreme performance (<1ms P99 latency overhead at 10,000 QPS), TensorZero provides a unified API for every major LLM provider including OpenAI, Anthropic, Google, AWS Bedrock, Azure, Mistral, and many more. The platform creates a feedback loop for optimizing LLM applications — turning production data into smarter, faster, and cheaper models through prompt optimization, fine-tuning, reinforcement learning, and distillation. TensorZero Autopilot acts as an automated AI engineer that analyzes observability data, optimizes prompts, sets up evaluations, and runs A/B tests. Backed by $7.3M in seed funding and 11K+ GitHub stars, TensorZero is used by companies from frontier AI startups to the Fortune 50.
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