{"slug":"openai-evals","name":"OpenAI Evals","domain":"openai.com","verdict":"As of 2026-08-14, ChatGPT, Claude, Gemini, Grok collectively rank OpenAI Evals #6 of 7 for prompt testing tool. Source: https://modelsagree.com/product/openai-evals (modelsagree.com, CC BY 4.0).","best_rank":6,"categories":1,"entries":[{"slug":"best-llm-prompt-testing-tool","title":"Best prompt testing tool","rank":6,"of":7,"score":2,"appearances":1,"modelRanks":{"Claude":4},"reason":"Flexible framework for codifying prompt regression tests as reusable eval specs, now backed by a hosted API and dashboard for graders and dataset management; strong when your stack centers on OpenAI models and you want tight, low-overhead grading close to the API.","reasons":[{"model":"Claude","reason":"Flexible framework for codifying prompt regression tests as reusable eval specs, now backed by a hosted API and dashboard for graders and dataset management; strong when your stack centers on OpenAI models and you want tight, low-overhead grading close to the API."}],"fixes":[{"model":"Claude","fix":"OpenAI-centric and more code-heavy to operate; weaker cross-provider and end-to-end observability story than vendor-neutral platforms."}],"updated":"2026-08-14","rank_history":{"days":["2026-07-11","2026-07-12","2026-07-13","2026-07-14","2026-07-15","2026-08-14"],"ranks":[null,null,null,null,null,6]},"api":"https://modelsagree.com/api/v1/best/best-llm-prompt-testing-tool.json"}],"page":"https://modelsagree.com/product/openai-evals","check":"https://modelsagree.com/check?q=OpenAI%20Evals","updated":"2026-09-09T13:07:58.066Z","attribution":"modelsagree.com, CC BY 4.0"}