GPTZero · 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.
US-West (California, AS2914)
JSON · Output attached · Open native file ↗
Subsequent pricing and service checks are shown separately without altering historical scores.
One run does not establish all complex scenes, untested paid maxima or long-term uptime.
Plans & historical pricing
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 ↗
Pricing recorded on the test date · 2026-11-01
Free (10,000 words/month)
Freemium + Premium/Professional subscriptions
Historical context only; not current purchase guidance.
Delivery & access
- Free delivery record
- Not recorded or not verified
- Watermark
- Not recorded or not verified
- Free allowance
- Not recorded or not verified
- Account requirements
- Not recorded or not verified
- Maximum specification record
- Overall AI/Mixed/Human probability verdict + AI Sentences/Patterns/Vocab dimensional analysis
May include advertised capabilities; this does not establish a tested paid tier.
- Batch & API
- Not recorded or not verified
- Manual refinement
- Not recorded or not verified
Tested result & sample
Not recorded or not verified
- Fixture
- anchor_aidetector_v1
- Recorded environment
- US-West (California, AS2914)
- Network-observed server wait
- 2.5 s
- End-to-end reference
- 2.5 s
Network wait includes round trips, queuing and polling error, not pure inference time. Local timings depend on the device; repetition counts are not standardized in legacy records.
Experience, rules & trust
- Disclosure
- Not recorded or not verified
- Interaction
- Not recorded or not verified
- Entity record
- GPTZero Inc.
- Origin
- Not recorded or not verified
- Domain history record
- Not recorded or not verified
- Third-party tracking record
- Stripe · Google Analytics · Cloudflare
- External information
- Not recorded or not verified
- Processing
- Not recorded or not verified
- Retention statement
- Not recorded or not verified
A recorded statement does not verify deletion or all data-processing behavior.
Verifiable audit trail & evidence
Four SHA-256-verified stages link the benchmark fixture, same-run interface screenshots, native exported artifact and archived pricing sources.
anchor_aidetector_v1 · Inspect fixture & file inspector →
Captures entry rules, result view and export disclosure.
Screenshots, native output and official claims support different conclusions. Evidence grades are not product safety certifications.
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.
Revisions & corrections
- 2026-11-01
Completed real-machine benchmark evaluation and 3-node screenshot verification under RealTest Protocol v2.3.