Snapshot testing for AI agents.
Record what your agent does today. Get told when it silently changes.
Your agent returns 200 and looks fine. But a model update, a provider change, or a one-line prompt edit just made it skip a clarification, call the wrong tool, or quietly drop output quality. Your tests still pass. Your users notice before you do.
EvalView snapshots your agent's behavior — the tools it calls, in what order, with what output — and tells you the moment that behavior changes. Like Jest snapshots, but for tool-calling, multi-turn agents.
↑ 30-second live demo — no API key needed
Quick Start
OpenAI adapter migration: OpenAI shut down the Assistants API on August 26, 2026. The latest published EvalView release, 0.8.1, still uses that API; the Responses API migration is currently unreleased source. If you use
openai-assistants, follow the migration guide before running your tests. Anassistant_idalone cannot preserve your agent's configuration. Other adapters are unaffected.
