{"slug":"promptfoo","name":"Promptfoo","domain":"promptfoo.dev","verdict":"As of 2026-07-15, ChatGPT, Claude, Gemini, Grok collectively rank Promptfoo first for prompt testing tool (one of 7 leaderboards it appears on). Source: https://modelsagree.com/product/promptfoo (modelsagree.com, CC BY 4.0).","best_rank":1,"categories":7,"brief":{"category":"best-ai-red-teaming-tool","title":"Best AI red teaming and LLM security testing tool","rank":1,"of":8,"top":null,"day":"2026-07-16","why":[{"t":"Strong CI/CD integration","m":["ChatGPT","Gemini","Claude","Grok"],"q":"Strong CI/CD integration"},{"t":"Config-driven developer workflow","m":["Gemini","Claude","Grok"],"q":"easy YAML/config-driven red teaming with auto-generated attacks"},{"t":"Broad app-specific attack coverage","m":["ChatGPT","Claude","Grok"],"q":"50+ vulnerability plugins tailored to app-specific testing (RAG/agents)"},{"t":"Open-source regression testing","m":["ChatGPT","Claude","Grok"],"q":"continuous regression testing with a large plugin set"}],"gap":[],"fix":[{"t":"Make advanced generation fully local","m":["ChatGPT"],"q":"Make advanced red-team generation fully local and open-source"},{"t":"Limited deep offensive discovery","m":["Claude","Grok"],"q":"deep offensive discovery still favors garak/PyRIT"},{"t":"Lacks production monitoring and guardrails","m":["Gemini"],"q":"lacks native live production monitoring or runtime guardrails"}]},"entries":[{"slug":"best-llm-prompt-testing-tool","title":"Best prompt testing tool","rank":1,"of":7,"score":18,"appearances":4,"modelRanks":{"ChatGPT":1,"Claude":1,"Gemini":1,"Grok":3},"reason":"Best overall for most developers: open-source, provider-neutral, declarative test matrices, strong assertions, caching, CI gates, side-by-side prompt/model comparison, and unusually capable red-teaming.","reasons":[{"model":"ChatGPT","reason":"Best overall for most developers: open-source, provider-neutral, declarative test matrices, strong assertions, caching, CI gates, side-by-side prompt/model comparison, and unusually capable red-teaming."},{"model":"Claude","reason":"Purpose-built for exactly this job — declarative test cases with assertions, side-by-side matrix runs across models/prompts, diff-able outputs, and first-class CI integration (GitHub Actions, pre-commit) so prompt regressions fail builds like unit tests; open-source, local-first (no data leaves your machine), and its red-teaming/scanning additions extend the same harness to safety regressions; assumption: the typical practitioner is a developer who wants prompt tests in version control and CI rather than a hosted dashboard"},{"model":"Gemini","reason":"Best-in-class local-first developer experience. It operates via a lightweight CLI using simple YAML configurations, runs 100% locally with built-in red-teaming, and integrates seamlessly as a fast quality gate in CI/CD pipelines without cloud dependencies."},{"model":"Grok","reason":"CLI-native, open-source leader for declarative batch prompt testing, regression checks, red teaming, and multi-provider comparisons with zero-cost core making it ideal for engineering-driven CI/CD"}],"fixes":[{"model":"ChatGPT","fix":"Configuration-heavy at scale and less polished for collaborative dataset curation and human review than hosted platforms."},{"model":"Claude","fix":"Weak as a collaborative platform — no rich hosted UI for PMs/non-engineers to author test cases or review runs, and tracing/production observability is out of scope, so teams usually pair it with a separate observability tool"},{"model":"Gemini","fix":"Lacks a collaborative, production-grade cloud dashboard, making it difficult for non-technical product managers to edit prompts, manage datasets, or link offline runs to online telemetry."},{"model":"Grok","fix":"Enhanced UI/collaboration features for non-technical stakeholders and PMs to participate in eval processes"}],"updated":"2026-07-15","rank_history":{"days":["2026-07-11","2026-07-12","2026-07-13","2026-07-14","2026-07-15"],"ranks":[2,3,1,1,1]},"reasoning_shift":[{"model":"Gemini","from":"2026-07-14","to":"2026-07-15","added":[{"t":"manage datasets","q":"manage datasets"},{"t":"link offline runs to online telemetry","q":"link offline runs to online telemetry"}],"dropped":[{"t":"open-source","q":"open-source"},{"t":"side-by-side model/prompt matrix evaluations","q":"side-by-side model/prompt matrix evaluations"},{"t":"local git hooks","q":"local git hooks"}]},{"model":"ChatGPT","from":"2026-07-14","to":"2026-07-15","added":[{"t":"human review","q":"human review"},{"t":"less polished than hosted platforms","q":"less polished for collaborative dataset curation and human review than hosted platforms"}],"dropped":[{"t":"deterministic and model-graded assertions","q":"broad deterministic and model-graded assertions"},{"t":"minimal setup","q":"with minimal setup"},{"t":"complex multi-step agents","q":"complex multi-step agents"}]},{"model":"Claude","from":"2026-07-13","to":"2026-07-14","added":[{"t":"Diff-able outputs","q":"diff-able outputs"},{"t":"Version-controlled prompt tests","q":"prompt tests in version control"},{"t":"Production observability out of scope","q":"tracing/production observability is out of scope"}],"dropped":[{"t":"Zero cost","q":"zero cost"},{"t":"Annotation queues","q":"annotation queues"},{"t":"Longitudinal experiment tracking","q":"longitudinal experiment tracking"}]}],"api":"https://modelsagree.com/api/v1/best/best-llm-prompt-testing-tool.json"},{"slug":"best-ai-red-teaming-tool","title":"Best AI red teaming and LLM security testing tool","rank":1,"of":8,"score":16,"appearances":4,"modelRanks":{"ChatGPT":1,"Claude":3,"Gemini":1,"Grok":3},"reason":"Best overall mix of broad attack coverage, agent/RAG testing, configurable multi-turn strategies, CI/CD automation, extensibility, and accessible open-source tooling","reasons":[{"model":"ChatGPT","reason":"Best overall mix of broad attack coverage, agent/RAG testing, configurable multi-turn strategies, CI/CD automation, extensibility, and accessible open-source tooling"},{"model":"Gemini","reason":"Leading developer-centric, CLI-first framework that treats adversarial testing like unit tests with excellent CI/CD integration and side-by-side prompt matrix evaluation."},{"model":"Claude","reason":"The best fit for developers hardening their own LLM application — config-driven, drops into CI/CD, auto-generates adversarial test cases mapped to the OWASP LLM Top 10 and other frameworks, and provides continuous regression testing with a large plugin set; open-source with a commercial tier, it delivers the most value per hour for app teams."},{"model":"Grok","reason":"Strong CI/CD integration, 50+ vulnerability plugins tailored to app-specific testing (RAG/agents), easy YAML/config-driven red teaming with auto-generated attacks; widely adopted for developer workflows and regression testing in production pipelines."}],"fixes":[{"model":"ChatGPT","fix":"Make advanced red-team generation fully local and open-source instead of relying partly on hosted services"},{"model":"Claude","fix":"Its strength is testing your own configured app (it needs that context) rather than open-ended model-vuln research; deep offensive discovery still favors garak/PyRIT."},{"model":"Gemini","fix":"Primarily designed for pre-deployment, single-turn testing and lacks native live production monitoring or runtime guardrails."},{"model":"Grok","fix":"More evaluation/red-team hybrid than pure deep offensive probing; less exhaustive on cutting-edge model-level or highly adaptive agentic attacks than specialized scanners."}],"updated":"2026-07-13","rank_history":{"days":["2026-07-12","2026-07-13"],"ranks":[1,3]},"reasoning_shift":[{"model":"Gemini","from":"2026-07-12","to":"2026-07-13","added":[{"t":"Adversarial testing like unit tests","q":"treats adversarial testing like unit tests"},{"t":"Side-by-side prompt matrix evaluation","q":"side-by-side prompt matrix evaluation"},{"t":"No production monitoring or guardrails","q":"lacks native live production monitoring or runtime guardrails"}],"dropped":[{"t":"Over 50 automated test types","q":"support for over 50 automated test types"},{"t":"High customization","q":"high customization"},{"t":"Needs better UI configuration","q":"Needs better out-of-the-box UI-based configuration and visualization to make it accessible to non-developer security teams."}]},{"model":"Claude","from":"2026-07-12","to":"2026-07-13","added":[{"t":"Mapped to OWASP frameworks","q":"auto-generates adversarial test cases mapped to the OWASP LLM Top 10 and other frameworks"},{"t":"Continuous regression testing","q":"provides continuous regression testing"},{"t":"Deep discovery favors alternatives","q":"deep offensive discovery still favors garak/PyRIT"}],"dropped":[{"t":"Active community","q":"active community"},{"t":"Path to enterprise reporting","q":"a smooth path from free local scans to enterprise reporting"},{"t":"Deeper multi-agent runtime simulation","q":"Deeper runtime/production attack simulation for deployed multi-agent systems"}]}],"api":"https://modelsagree.com/api/v1/best/best-ai-red-teaming-tool.json"},{"slug":"best-llm-eval-framework-open-source","title":"Best open-source LLM eval framework","rank":2,"of":8,"score":10,"appearances":3,"modelRanks":{"ChatGPT":4,"Claude":2,"Gemini":2},"reason":"Declarative YAML-based prompt/RAG/agent testing with side-by-side model comparison, caching, and the best open-source red-teaming/vulnerability-scanning suite in the category; language-agnostic CLI fits any stack and runs cleanly in CI without writing code.","reasons":[{"model":"Claude","reason":"Declarative YAML-based prompt/RAG/agent testing with side-by-side model comparison, caching, and the best open-source red-teaming/vulnerability-scanning suite in the category; language-agnostic CLI fits any stack and runs cleanly in CI without writing code."},{"model":"Gemini","reason":"Exceptionally fast, CLI-first, and configuration-driven testing tool optimized for prompt engineering, red-teaming, and regression testing in build pipelines."},{"model":"ChatGPT","reason":"Exceptionally practical for prompt and model comparisons, with declarative configuration, broad provider support, assertions, red-teaming, caching, side-by-side reports, and easy CI integration"}],"fixes":[{"model":"ChatGPT","fix":"Build a deeper library of rigorously validated metrics and standardized benchmarks"},{"model":"Claude","fix":"The config-file paradigm gets unwieldy for deeply programmatic or multi-step pipeline evals, where a code-first framework like DeepEval is a better fit."},{"model":"Gemini","fix":"Enhance native support for complex multi-turn agent trace evaluations and interactive debugging within the CLI."}],"updated":"2026-07-13","rank_history":{"days":["2026-07-12","2026-07-13"],"ranks":[2,2]},"reasoning_shift":[{"model":"Claude","from":"2026-07-12","to":"2026-07-13","added":[{"t":"Language-agnostic CLI","q":"language-agnostic CLI fits any stack"},{"t":"Config gets unwieldy","q":"The config-file paradigm gets unwieldy for deeply programmatic or multi-step pipeline evals"}],"dropped":[{"t":"Built-in graders are thinner","q":"its built-in graders are thinner than DeepEval's research-backed metrics"},{"t":"Custom assertions still required","q":"complex agentic and multi-turn evaluation still requires custom assertions."}]}],"api":"https://modelsagree.com/api/v1/best/best-llm-eval-framework-open-source.json"},{"slug":"best-prompt-engineering-framework","title":"Best prompt engineering framework","rank":4,"of":14,"score":4,"appearances":1,"modelRanks":{"Gemini":2},"reason":"The industry-standard CLI-first testing and red-teaming tool. It allows developers to define YAML-based test cases and run automated local or CI/CD regression tests to catch prompt security and quality issues before deployment.","reasons":[{"model":"Gemini","reason":"The industry-standard CLI-first testing and red-teaming tool. It allows developers to define YAML-based test cases and run automated local or CI/CD regression tests to catch prompt security and quality issues before deployment."}],"fixes":[{"model":"Gemini","fix":"It lacks runtime prompt delivery/hosting and production tracing, requiring integration with other tools for live operational observability."}],"updated":"2026-07-14","api":"https://modelsagree.com/api/v1/best/best-prompt-engineering-framework.json"},{"slug":"best-llm-evaluation-tool","title":"Best LLM evaluation tool","rank":5,"of":7,"score":8,"appearances":3,"modelRanks":{"ChatGPT":4,"Claude":4,"Gemini":2},"reason":"The ultimate developer CLI and configuration-driven (YAML/JSON) tool for rapid prompt engineering, comparison, and red-teaming. Incredibly fast, light, and perfectly suited for developer-focused CI/CD pipelines that test prompts and models systematically. (Near-tie with DeepEval, ranked second because YAML configs can feel rigid for complex, dynamic agent test logic).","reasons":[{"model":"Gemini","reason":"The ultimate developer CLI and configuration-driven (YAML/JSON) tool for rapid prompt engineering, comparison, and red-teaming. Incredibly fast, light, and perfectly suited for developer-focused CI/CD pipelines that test prompts and models systematically. (Near-tie with DeepEval, ranked second because YAML configs can feel rigid for complex, dynamic agent test logic)."},{"model":"ChatGPT","reason":"Highest-value developer-first choice for fast model and prompt comparisons, extensive assertions, provider flexibility, caching, CI gates, and unusually capable red-teaming in a simple open-source CLI workflow"},{"model":"Claude","reason":"The best lightweight open-source harness for offline evals — declarative YAML configs, matrix testing across providers/prompts, CI-native regression gating, and a strong red-teaming/security scanner bolted on; for an engineer who wants evals in a repo next to the code with no platform to adopt, nothing is faster."}],"fixes":[{"model":"ChatGPT","fix":"Less suited to organization-wide production feedback loops, trace analysis, and collaborative evaluation operations"},{"model":"Claude","fix":"Deliberately test-runner-shaped — no production trace capture or online evaluation, so it covers pre-deployment only and teams outgrow it once they need to score live traffic."},{"model":"Gemini","fix":"It lacks robust built-in production runtime tracing and continuous observability, making its web UI mostly a static local test report generator rather than a production feedback loop."}],"updated":"2026-07-15","rank_history":{"days":["2026-06-29","2026-06-30","2026-07-08","2026-07-09","2026-07-10","2026-07-12","2026-07-13","2026-07-14","2026-07-15"],"ranks":[6,7,null,7,null,6,5,6,2]},"reasoning_shift":[{"model":"Gemini","from":"2026-07-14","to":"2026-07-15","added":[{"t":"CI/CD pipelines","q":"perfectly suited for developer-focused CI/CD pipelines"},{"t":"static local test reports","q":"making its web UI mostly a static local test report generator rather than a production feedback loop"}],"dropped":[{"t":"language-agnostic","q":"language-agnostic"},{"t":"built-in adversarial plugins","q":"built-in adversarial plugins"}]},{"model":"ChatGPT","from":"2026-07-14","to":"2026-07-15","added":[{"t":"CI gates","q":"CI gates"},{"t":"organization-wide feedback loops","q":"organization-wide production feedback loops"}],"dropped":[{"t":"declarative test matrices","q":"declarative test matrices"}]},{"model":"Claude","from":"2026-07-14","to":"2026-07-15","added":[{"t":"offline evals","q":"offline evals"},{"t":"no online evaluation","q":"no production trace capture or online evaluation"},{"t":"scores live traffic","q":"teams outgrow it once they need to score live traffic"}],"dropped":[{"t":"model-graded checks","q":"model-graded checks"},{"t":"no data leaves machine","q":"runs fully local with no data leaving your machine"},{"t":"human annotation","q":"weak for PMs/domain experts doing human annotation"}]}],"api":"https://modelsagree.com/api/v1/best/best-llm-evaluation-tool.json"},{"slug":"best-agent-evaluation-platforms-for-tool-calling-reliability","title":"Best agent evaluation platforms for tool-calling reliability","rank":6,"of":7,"score":2,"appearances":2,"modelRanks":{"Gemini":5,"Grok":5},"reason":"Exceptionally lightweight CLI tool for security red-teaming tool abuse, validating JSON/schema parameters, and running rapid deterministic tool-calling evaluations in pre-commit hooks.","reasons":[{"model":"Gemini","reason":"Exceptionally lightweight CLI tool for security red-teaming tool abuse, validating JSON/schema parameters, and running rapid deterministic tool-calling evaluations in pre-commit hooks."},{"model":"Grok","reason":"Declarative CLI with tool-call-f1, trajectory:tool-used and trajectory:tool-args-match assertions plus native multi-provider tool-calling examples; strong CI and red-team fit for catching selection and argument failures early at zero platform cost"}],"fixes":[{"model":"Gemini","fix":"Designed primarily for isolated or shallow tool-calling assertions rather than stateful multi-turn agent trajectory evaluation."},{"model":"Grok","fix":"Not for deep production observability or multi-turn trajectory visualization beyond config-driven runs"}],"updated":"2026-08-10","rank_history":{"days":["2026-08-03","2026-08-10"],"ranks":[7,5]},"api":"https://modelsagree.com/api/v1/best/best-agent-evaluation-platforms-for-tool-calling-reliability.json"},{"slug":"best-ai-evals-platform-for-production","title":"Best AI evals platform for production","rank":7,"of":9,"score":2,"appearances":2,"modelRanks":{"Claude":5,"Gemini":5},"reason":"The de-facto standard for config-driven, CI-first eval and red-teaming — declarative YAML test matrices across providers, deterministic + model-graded assertions, and security/jailbreak scanning that slot directly into pull-request gates with zero infrastructure.","reasons":[{"model":"Claude","reason":"The de-facto standard for config-driven, CI-first eval and red-teaming — declarative YAML test matrices across providers, deterministic + model-graded assertions, and security/jailbreak scanning that slot directly into pull-request gates with zero infrastructure."},{"model":"Gemini","reason":"The best lightweight, CLI-first, open-source tool for quick local prompt testing, assertion verification, and automated security red-teaming."}],"fixes":[{"model":"Claude","fix":"Offline testing only — no production tracing or online evaluation, so it complements rather than replaces an observability platform."},{"model":"Gemini","fix":"It functions primarily as a test runner and lacks production monitoring databases or real-time tracing capabilities."}],"updated":"2026-07-13","rank_history":{"days":["2026-07-11","2026-07-12","2026-07-13"],"ranks":[null,null,6]},"api":"https://modelsagree.com/api/v1/best/best-ai-evals-platform-for-production.json"}],"page":"https://modelsagree.com/product/promptfoo","check":"https://modelsagree.com/check?q=Promptfoo","updated":"2026-08-10T18:18:45.051Z","attribution":"modelsagree.com, CC BY 4.0"}