GPTZero
Leading AI text detection, academic integrity, and writing provenance analysis platform founded by Edward Tian
Product node overview & trust baseline
Operator provenance, privacy baseline and site-wide pricing belong directly to the product node and are inherited across linked task edgesGPTZero (founded in 2023 by Princeton alumni Edward Tian and Alex Cui, headquartered in New York, US) is a prominent AI-generated content (AIGC) detection and writing analysis platform widely used by educators, institutions, and publishers to identify text from models like ChatGPT, Claude, Gemini, and LLaMA. Operating on statistical perplexity, burstiness metrics, and neural classifiers, it features sentence-level AI highlighting, mixed human/AI attribution, and writing replay provenance. GPTZero operates a freemium model: Free tier grants 10,000 words/month; paid individual tiers include Premium ($23.99/month for 300,000 words/mo, multilingual detection, and exportable reports) and Professional ($45.99/month for 500,000 words/mo, batch uploads up to 250 files, and page-by-page scanning); annual equivalents ($12.99/mo, $24.99/mo) are unverified due to lack of upfront billing total breakdown.
New York, United States · Founded in January 2023
Provenance baseline: 18/20 · Founded from Princeton research; partnership with AFT; prominent academic and media recognition.
Verified direct monthly rates: Premium $23.99/mo, Professional $45.99/mo; annual plan cards show monthly equivalents ($12.99/mo, $24.99/mo) without explicit annual invoice total; Free tier provides 10,000 words/mo.
Pricing transparency baseline: 33/35 · Cancellation:
Complies with GPTZero Privacy Policy and Terms of Use; commitments for student and educator data privacy
Stripe · Google Analytics · Cloudflare
Product-level pricing & rules baseline
Verified plans, billing periods and cancellation terms owned by this product node; task-specific credit costs and free export limits are detailed per capability edge belowGPTZero Free, Premium, and Professional subscription pricing structure · 2026-10-31
Basic AI scan and detection
Advanced multi-model detection, exportable reports, extension highlights
All of Premium, batch scanning up to 250 files, page-by-page scanning, enterprise security
Advanced AI scan and downloadable reports；Displays only equivalent $12.99/mo billed annually without explicit annual total
Full batch and page-by-page scan；Displays only equivalent $24.99/mo billed annually without explicit annual total
5 plan / billing-period records, all listed; — means that period is not recorded.
Verified direct monthly rates: Premium $23.99/mo, Professional $45.99/mo; annual plan cards show monthly equivalents ($12.99/mo, $24.99/mo) without explicit annual invoice total; Free tier provides 10,000 words/mo.
Verification has gaps; unknown prices and quotas are not inferred.
Cancellation, sources & verification record
Cancellation and refund terms unverified
GPTZero Official Pricing Page ↗ · 2026-10-31 Capture 1 ↗
Archived official pricing sources: GPTZero Official Pricing Page (2026-10-31) [text snapshot ↗]
Capability map & linked task edges
Whenever a capability passes fixed-fixture testing, an edge is automatically linked between this product node and the task topic for horizontal comparison.
| Linked task edge | Score | Assessment · historical test | Test scope & delivery | Inspect capability / follow edge |
|---|---|---|---|---|
| AI content detection | 96/100 | GPTZero, a prominent leader in academic and enterprise AI detection, delivered exceptional diagnostic precision and engineering polish. Against our benchmark AI sample, the cloud-based Model 3.3b completed evaluation in 2.50s, accurately assigning a 100.0% AI probability with zero false-negative drift. With sentence-level coloration, perplexity metrics, and a clean guest workflow, GPTZero firmly earns its top-tier benchmark standing. | JSON · Output attached Historical test · 2026-11-01 Account / tier unconfirmed · Calibrated AI vs human text benchmark (literature master & LLM prose, 780 B) · Output attached |
Tested task edges (with scores and native artifacts) are strictly separated from discovered untested capabilities (unscored).
Peer product comparison across shared task edges
Matched by overlapping tested task edges; compare site-wide billing models alongside per-task benchmark scoresVerified monthly rates: Personal $16.99/mo, Pro $99.99/mo; explicit annual upfront invoice totals: Personal $167.88/yr ($13.99/mo), Pro $899.88/yr ($74.99/mo); extra unified credits available for top-up.
- AI content detection：GPTZero 96/100 vs Copyleaks 94/100
Free tier is permanently free; Pro tier is $12/month with a 7-day free trial and email reminder sent 2 days prior to billing.
- AI content detection：GPTZero 96/100 vs Grammarly 96/100
Linked capability test: AI content detection
2026-11-01 · Native output attached. Findings cover the recorded fixture and conditions; paid specifications may be untested.
Verified native export & same-run screenshot evidence
Open native exported file (JSON · Output attached) ↗
Task quality
AI probability 100% · Human probability 0% · Classification label AI-generated · Confidence calibrated Yes
Detailed facts & historical record
- Measured fixture results
AI probability: 100% · Human probability: 0% · Classification label: AI-generated · Confidence calibrated: Yes
- Fixture findings
Flawless benchmark performance: 100.0% AI probability detection aligning completely with ground truth, calibrated confidence, and a rapid 2.50s turnaround.
- Original historical observation
Not verified
- Suitable uses · historical assessment
Not verified
- Result & output evidence
Delivery capabilities
JSON · Output attached · Check watermark record
Detailed facts & historical record
- Recorded export specifications
JSON · Output attached · Check watermark record
- Historical specification note · not an official maximum
Overall AI/Mixed/Human probability verdict + AI Sentences/Patterns/Vocab dimensional analysis
- Watermark observation
Not verified
- Batch & API
Not verified
- Recorded free-tier dimensions
Not verified
- Attached file dimensions
Not verified
Speed & reliability
About 2.5s end to end in this run; reliability not retested
Detailed facts & historical record
- Timing observation
Network-observed server wait: 2.5s · End-to-end reference: 2.5s
- Date & fixture
2026-11-01 · anchor_aidetector_v1 · US-West (California, AS2914)
- Repeated tests & reliability
No standardized repetition count, success rate or variability range is recorded.
Interaction experience
Account requirement unconfirmed
Detailed facts & historical record
- Account requirements
Not verified
- Sign-in methods
Not verified
- Manual adjustment
Not verified
- Interaction observations
Not verified
Background & reputation
GPTZero Inc. · Long-term reputation not independently verified
Detailed facts & historical record
- Service lifecycle notice
Not verified
- Operator
GPTZero Inc.
- Recorded origin
Not verified
- Domain history record
Not verified
- Background & reputation assessment
Not verified
- External reputation record
Not verified
Engineering & privacy
Processing location unconfirmed；Explicit retention period unconfirmed; inspect policy record
Detailed facts & historical record
- Processing location
Processing location unconfirmed
- Third-party tracking record
Stripe · Google Analytics · Cloudflare
- Engineering & privacy assessment
Not verified
- Retention statement
Explicit retention period unconfirmed; inspect policy record
Task free allowance & pricing disclosure
Not recorded
Not recorded
Site-wide plans belong to the product node (see Product-level pricing baseline ↑).
Expand site-wide plans aligned for AI content detection (5 records)
GPTZero Free, Premium, and Professional subscription pricing structure · 2026-10-31
Basic AI scan and detection
Advanced multi-model detection, exportable reports, extension highlights
All of Premium, batch scanning up to 250 files, page-by-page scanning, enterprise security
Advanced AI scan and downloadable reports；Displays only equivalent $12.99/mo billed annually without explicit annual total
Full batch and page-by-page scan；Displays only equivalent $24.99/mo billed annually without explicit annual total
5 plan / billing-period records, all listed; — means that period is not recorded.
Verified direct monthly rates: Premium $23.99/mo, Professional $45.99/mo; annual plan cards show monthly equivalents ($12.99/mo, $24.99/mo) without explicit annual invoice total; Free tier provides 10,000 words/mo.
Verification has gaps; unknown prices and quotas are not inferred.
Cancellation, sources & verification record
Cancellation and refund terms unverified
GPTZero Official Pricing Page ↗ · 2026-10-31 Capture 1 ↗
Evaluation basis & full scores · Overall 96.2/100
Overall = honesty & reputation × 30% + capability × 70%. Component maxima follow this report’s rubric. List scores are rounded for display; original precision is retained here.
Scoring version 2.3.1 · Test fixture anchor_aidetector_v1
Honesty & reputation · 92/100 · 30%
| Criterion | Score | Rationale | Basis |
|---|---|---|---|
| Pricing transparency | 33 / 35 | Explanation unavailable | Evidence A → |
| Interaction restraint | 27 / 30 | Explanation unavailable | Evidence A → |
| Background & reputation | 18 / 20 | Explanation unavailable | Evidence A → |
| Engineering & privacy | 14 / 15 | Explanation unavailable | Evidence A → |
Capability · 98/100 · 70%
| Criterion | Score | Rationale | Basis |
|---|---|---|---|
| Task quality | 65 / 65 | AI Probability: 100% · Human Probability: 0% · Label: ai · Calibrated: Yes | Evidence A → |
| Deliverable specifications | 18 / 20 | Clean unwatermarked export (8/8); Export spec: Overall AI/Mixed/Human probability verdict + AI Sentences/Patterns/Vocab dimensional analysis | Evidence A → |
| Processing speed | 15 / 15 | Network-observed server wait: 2.5s (API mode: async_verified; network upload 0s / end-to-end 2.5s shown for reference only, never penalized) | Evidence A → |
Legacy scores may include advertised maximum capabilities. Read tested output separately from paid capabilities. Records without matching tiers and scope are not ranked together.
Developer & citation kit · Claim updates, request benchmarks & embed verified badges
Product developers and writers can embed these SVG badges in official websites, GitHub READMEs or documentation, or use the channels below to sync product-wide plans and capabilities.
[](https://realtest.org/tools/gptzero.me/) <a href="https://realtest.org/tools/gptzero.me/"><img src="https://realtest.org/badges/gptzero.me.svg" alt="GPTZero — RealTest" height="24" /></a> 
[](https://realtest.org/tools/gptzero.me/#feature-ai-detector)