Comparison
GradeX vs TAG
GradeX and TAG are both algorithm-driven, but they operate at different points in the workflow: GradeX is a phone app that predicts every grader's likely outcome; TAG is a slabbing service that issues an official, certified TAG grade.
At a glance
TAG Grading uses computer vision to deliver an objective, repeatable grade on a 1–1000 numeric scale (with letter grades attached). The pitch is consistency: a TAG 8.5 today is the same standard as a TAG 8.5 next year. Slabs are chip-tagged for digital authentication.
Side-by-side
| Attribute | GradeX | TAG |
|---|---|---|
| Type of service | AI grade prediction app — software only | Automated grading service with chipped slab |
| Output | Predicted grades for PSA, BGS, CGC, AND TAG (1–1000) | Single TAG numeric score + letter grade |
| Algorithm | LLM-based (Claude Sonnet 4.5) + parallel defect specialist + self-consistency | Computer-vision pipeline trained on a calibrated dataset |
| Turnaround | ≈60 seconds in-app | Multi-week submission like other graders, plus chip-tag processing |
| Cost per card | Free or $9–$29/mo subscription | ≈$25–$200+ per card depending on tier and declared value |
| Repeatability | Self-consistency reruns flag ambiguous cases as low-confidence | Marketed as fully repeatable — same card, same score, every time |
| Slab + cert | Predictions are not slabbed | Issues a chip-tagged slab with digital authentication |
| Defect surfacing | Per-defect markers on front and back | Numeric components only |
When to choose GradeX
- Decide whether to send a card to TAG by scanning it first — the in-app TAG prediction tells you whether a 950+ score is likely.
- See how a card maps across multiple grading rubrics in one scan, instead of betting on a single grader.
- Quickly process bulk before deciding which subset to submit.
When to choose TAG
- You want an officially-issued TAG grade with a chip-tagged slab and digital authentication.
- You're selling into the segment of buyers who specifically prefer TAG's repeatable, computer-vision-derived grades.
- You believe automated grading is the long-term direction of the hobby and want exposure.
The short verdict
GradeX is the right tool BEFORE submitting; TAG is the right destination IF you want an officially certified automated grade. The two are highly complementary — GradeX's TAG prediction tells you whether the slab is likely to land in the premium 950+ range that justifies the submission cost.