Grammarly · AI content detection
Grammarly's AI Detector brings the company's trademark engineering polish and friction-free user experience to content authenticity verification. Allowing guest users to scan up to 1,400 words without registration, the cloud pipeline completed evaluation in 7.68s, delivering a calibrated 100.0% AI detection verdict with an elegant semi-circular gauge and zero ad distractions.
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
Grammarly Free and Pro subscription pricing structure · 2026-10-31
Basic grammar and spell check, tone detection
Full sentence rewriting, tone adjustments, plagiarism check, AI content detection
2 plan / billing-period records, all listed; — means that period is not recorded.
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.
Cancellation, sources & verification record
Cancellation and refund terms unverified
Grammarly Plans Official Pricing Page ↗ · 2026-10-31 Capture 1 ↗
Pricing recorded on the test date · 2026-11-01
Completely free (1,400 words/submission)
Freemium + Pro subscription ($12/month)
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
- Semi-circular AI probability gauge + Resembles AI text percentage scale
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
- 7.68 s
- End-to-end reference
- 7.68 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
- Grammarly, Inc.
- Origin
- Not recorded or not verified
- Domain history record
- Not recorded or not verified
- Third-party tracking record
- Google Analytics · Datadog · 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 95.7/100
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 · 95/100 · 30%
| Criterion | Score | Rationale | Basis |
|---|---|---|---|
| Pricing transparency | 34 / 35 | Explanation unavailable | Evidence A → |
| Interaction restraint | 28 / 30 | Explanation unavailable | Evidence A → |
| Background & reputation | 19 / 20 | Explanation unavailable | Evidence A → |
| Engineering & privacy | 14 / 15 | Explanation unavailable | Evidence A → |
Capability · 96/100 · 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: Semi-circular AI probability gauge + Resembles AI text percentage scale | Evidence A → |
| Processing speed | 13 / 15 | Network-observed server wait: 7.68s (API mode: async_verified; network upload 0s / end-to-end 7.68s 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.