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OpenAI Moderation API

Free#12 of 27 in AI Content Moderation Software

OpenAI Moderation API: A free moderation API for text and image safety checks. Ranked #12 of 27 in AI Content Moderation Software by our editors (8.0/10); pricing: Free plan; best for free API moderation for text and images.

8.0/10Editor score

Visit OpenAI

OpenAI Moderation API8.0 Visit OpenAI

At a glance

Editor score
8.0 / 10
Pricing
Free plan
Best for
Free API moderation for text and images
Free plan
Yes
Paid from
Free
Text moderation
Yes
Facts checked
21 Sep 2026

Where it wins
- Free for OpenAI API users
- Returns category flags and per-category confidence scores
- Supports moderation for both inputs and generated outputs
Where it doesn't
- Does not classify audio
- Does not classify video
- Policy enforcement and review routing require application logic

Our verdict on OpenAI Moderation API

OpenAI Moderation API is a cloud-based API for developers building applications that need automated checks for potentially harmful content. It classifies standalone text and image inputs, returns category-level violation flags and per-category confidence scores, and reports which input types apply to each category. Applications can use these signals to filter content, enforce their own policies, or route cases for review.

The published Free plan is available to OpenAI API users, and usage does not count toward monthly usage limits. The API supports standalone moderation requests through the moderation endpoint, as well as moderation scores for generated model input and output. This makes it suitable for applications that need checks both before content is processed and after a model produces a response. Its API-only delivery fits teams building their own moderation workflows rather than buyers seeking a separate moderation dashboard.

Its main boundary is coverage. The API classifies text and images, while OpenAI states that the omni-moderation-latest model does not classify audio. Video moderation is also outside the listed input coverage. The API provides signals for custom policies and review routing, but policy enforcement and operational review remain part of the application design. Choose it for free, programmable text and image moderation with confidence scores and input-output checks. Consider another option if audio, video, or a built-in human-review workflow is central to your requirements.

Your product? Our editors can test OpenAI Moderation API in depth and publish a review, labelled as paid · from $149/mo →

OpenAI Moderation API pricing

Plans Free planFree Free to use — no paid tier required for the core job.

See plans on developers.openai.com

All 1 OpenAI Moderation API plans and prices →

OpenAI Moderation API fact sheet

Free plan	Yes
Paid from	Free
Text moderation	Yes
Image moderation	Yes
Audio moderation	No
Video moderation	No
Custom policies	Yes
Human review workflow	Not verified
Deployment options	Cloud
Deployment	Cloud
Support	Docs, Community
Built for	Solo, Small business, Mid-market, Enterprise (editorial estimate)
Pricing	Free plan (source)
Website	developers.openai.com
Facts checked	21 Sep 2026

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Featured on iTechGuides

OpenAI Moderation API is listed in our AI Content Moderation Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update