gptzero.me · AI content detection
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.
Tested export 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
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
Pricing & rules
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 ↗
Allowance & disclosure on test date
Not recorded
Not recorded
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.
