Originality.ai
Originality.ai is an AI content detection tool that checks whether text was generated by major large language models, offering a free allowance and credit-based paid plans.
About Originality.ai
Originality.ai is an AI content detection tool. According to its official website, it is the most accurate AI detector in multiple third-party studies, and it claims to be effective against major large language models such as GPT-5.6, Claude Fable 5, Gemini 3, and Kimi K3. Users can check up to 2,000 words of text for free, with up to 3 free AI detections per day; those who need to check more content can upgrade to a paid plan. Paid plans are billed by credits, with 1 credit covering 100 words. Subscription credits refresh monthly, and unused credits expire at the end of the month; additional credits can also be purchased as needed. Note that tools that use AI to rewrite or edit text (such as some Grammarly features) may cause false positives, and shorter texts may affect accuracy—the official site enforces a 100-word minimum text length.
Best for
Best use cases
Check the proportion of AI-generated content in articles, manuscripts, or outsourced content before publishing
Set permitted AI usage for a team or project (AI Allowance detection)
Try the AI detection for free before deciding whether to upgrade to a paid plan
Features
AI Content Detection
The official site calls it the most accurate AI detector in multiple third-party studies and claims it is effective against major large language models such as GPT-5.6, Claude Fable 5, Gemini 3, and Kimi K3.
Free Allowance
Free checks cover up to 2,000 words, with up to 3 free AI detections per day—no payment required.
Credit-Based Billing
Paid plans are billed by credits, with 1 credit equal to 100 words; additional credits can be purchased as needed.
AI Allowance Detection
AI Allowance detection (a new feature) lets you align permitted AI usage with project guidelines.
Pros
- The official site says it is the most accurate AI detector in multiple third-party studies
- Offers a free allowance: up to 2,000 words and 3 free AI detections per day
- Flexible credit system—buy additional credits as needed
- Standard support provided; the official site says issues are typically resolved within 24 hours
Cons
- Shorter texts may affect detection accuracy; the official site enforces a 100-word minimum text length
- Tools that use AI to rewrite or edit text (such as some Grammarly features) may trigger false positives
- Subscription credits that go unused in a given month expire at the end of the month
Pricing Plans
Pro (billed annually)
- 2,000 credits per month, with additional credits available as needed
- 1 credit equals 100 words
- Subscription credits refresh monthly; unused credits expire at the end of the month
- Standard support: issues are typically resolved within 24 hours
Enterprise (billed annually)
- 15,000 credits per month, with additional credits available as needed
- 1 credit equals 100 words
- Subscription credits refresh monthly; unused credits expire at the end of the month
Pro (billed monthly)
- 2,000 credits per month, with additional credits available as needed
- 1 credit equals 100 words
- Subscription credits refresh monthly; unused credits expire at the end of the month
Enterprise (billed monthly)
- 15,000 credits per month, with additional credits available as needed
- 1 credit equals 100 words
- Subscription credits refresh monthly; unused credits expire at the end of the month
* Pricing information is for reference only. Please refer to the latest announcement on Originality.ai's official website.