These tools integrates with
PromptFoovsOpenAI API
CLI/library for prompt testing and red-teaming versus GPT-5 era models, embeddings, and Responses API from OpenAI
Compare interactively in Explore →Choose PromptFoo when…
- •You want CLI-first, config-driven LLM evals
- •Running eval suites in CI/CD pipelines is a goal
- •You need red-teaming and safety testing built in
Choose OpenAI API when…
- •You need the broadest ecosystem and most integrations
- •GPT-4 or o-series reasoning models are required
- •Assistants API, fine-tuning, or batch API are needed
Side-by-side comparison
Field
PromptFoo
OpenAI API
Category
Prompt & Eval
LLM Infrastructure
Type
Open Source
Commercial
Free Tier
✓ Yes
✗ No
Pricing Plans
—
API: Per token
GitHub Stars
⭐ 5,000
—
Health
●95 — Active
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PromptFoo
Test and compare prompts across models. Built-in red-teaming, regression testing, and side-by-side model comparison.
OpenAI API
API access to GPT-5, GPT-5.5, o3/o4 reasoning models, and the Responses API; plus embeddings, image, audio, and Realtime endpoints. The most widely deployed LLM API in production.
Shared Connections3 tools both integrate with
Only PromptFoo (3)
OpenAI APIVellumAgenta
Only OpenAI API (36)
CrewAIAutoGenLlamaIndexLangChainPydanticAIsmolagentsAgnoMastraLiteLLMPortKey
Explore the full AI landscape
See how PromptFoo and OpenAI API fit into the bigger picture — 235 tools, 543 relationships, all mapped.