Marksyvs
ChatGPT
What Marksy does that ChatGPT does, what it adds, and where ChatGPT is still the better pick.
Based on what each tool says publicly, checked on (ChatGPT pricing page, Marksy grading accuracy test, Marksy pricing page). Prices and features change, so check before you pay.
Which should you choose?
ChatGPT can do almost anything if you set it up. Marksy is set up already: the criteria for your subject, comments on your own sentences, and marks tested against the IB's. It also has oral practice, practice questions, source checking and textbooks built for the IB.
Choose
ChatGPTif
- you want to brainstorm or have a topic explained in your own words
- you want help with things that aren't IB work
Choose
Marksyif
- you want the criteria for your subject already set up
- you want a mark that has been tested against real IB marks
- you want comments placed on your own sentences, not a block of chat text
We tested ChatGPT on the same essays
We gave ChatGPT (GPT-6.1 Sol) the IB criteria and 226 essays the IB had already marked, with as many weak essays as strong ones. It scored 65/100 on our marking score. Marksy scored 74.
The gap is biggest on strong work. For essays the IB gave a 7, ChatGPT's mark was within one grade 35% of the time. Marksy's was 65%.
ChatGPT is still useful for brainstorming and explaining topics. It just isn't set up to mark IB coursework.
92%
of Marksy's marks land within one grade of the IB's final mark
Tested on 1,317 IAs and TOK essays the IB had already marked. See how we tested
Feature by feature
| Feature |  ChatGPT | |
|---|---|---|
| Grading your coursework | ||
| Grades IA, EE and TOK drafts | Yes IAs, Extended Essays, TOK essays and exhibitions. | Partly Gives feedback on any draft if you paste in the criteria yourself. |
| Mark for each criterion | Yes A mark for each criterion, comments on your own sentences and a list of what to fix first. | Partly If you ask for them. |
| Accuracy tested and published | Yes 92% of marks within one grade, tested on 1,317 IB-marked IAs and TOK essays. | No Not by OpenAI. In our test, with the criteria pasted in, it scored 65/100 on our marking score. Marksy scored 74. |
| AI check | Yes Included on paid plans. | No No. |
| Source checking | Yes Checks who made each source, when it was published, and whether you have enough variety for your assignment. | Partly Can discuss a source you paste in, but doesn't know your assignment's rules. |
| Grade several drafts at once | Yes Up to 15 drafts at once on Student Plus. | No One chat at a time. |
| Review by a human examiner | No AI marking, tested against examiners' marks. | No No. |
| Studying for exams | ||
| Practice questions by topic | Yes Maths, Physics, Chemistry and Biology, with your written answers marked against the markscheme. | Partly Can write questions, but not from a checked IB-style bank. |
| Oral practice with feedback | Yes Timed, with follow-up questions and a mark. Included on paid plans. | Partly Voice chat can act out an oral if you set up the format. |
| Textbooks or notes | Yes Free Physics and Biology textbooks, no account needed. | No Explains topics in chat. No textbooks. |
| Interactive simulations | Yes About 150 inside the Physics and Biology chapters. Free. | No No ready-made simulations. |
| Price | ||
| Free plan | Yes 5 free gradings a month, no card needed. | Yes A free plan with limited uploads. |
| Paid plans | Yes From $8.99 a month (billed yearly) for 50 gradings, 20 AI checks and 5 orals. Student Plus: 200, 50 and 20. | Partly Free, then paid Go, Plus and Pro plans. |
Want to check your own draft?
5 free gradings a month. No card.