AI Evals That Ship 2026: Braintrust, Langfuse & DeepEval
Choosing an llm evaluation framework in 2026? Compare Braintrust, Langfuse, and DeepEval on CI gating, tracing, and cost before your next deploy.
Chapter 1: Why LLM Evals Became a Deploy Gate in 2026 Somewhere between the first ChatGPT wrapper and the agent fleets running in production today, the industry quietly changed its mind about what "working" means. In 2023, an LLM feature shipped when the demo looked good in a standup. In 2026, it ships when a suite of graded test cases passes a threshold in CI — and it gets blocked when they don't. That transition, from taste to gate, is the single most important shift in applied AI engineering, and it's why an llm evaluation framework is now as much...