Oposilab vs ChatGPT for oposiciones: what changes when the AI only uses your syllabus
Data checked on 18 September 2026
Many candidates already use ChatGPT to solve syllabus doubts. It works, with one condition: you are the one who has to check that the answer and the citation are right. Oposilab starts from that limitation: the tutor only answers from your exam’s official syllabus and every statement carries the article, which opens with a click.
This comparison does not claim one tool is better than the other. They are different things and can be combined.
| Aspect | Oposilab | ChatGPT |
|---|---|---|
| Price | Free with no card. Pro €19 per month or €149 per year. Pro Max €29 per month. | Free €0, Go €7.99 per month and Plus €22.99 per month on the Spanish App Store, according to Ranquia’s guide updated on 14 August 2026. Web price and VAT are confirmed at checkout.[1] |
| Where answers come from | Only from your exam’s official syllabus, indexed article by article and checked every week against the BOE. It does not answer about user-uploaded PDFs. | From its general model and, if enabled, from web search or the documents you paste. It is not limited to your syllabus. |
| Article citation | Every statement carries the article citation and the citation opens the literal text of the rule in Oposilab’s corpus. | It can cite articles if asked, but the citation is not linked to a consolidated text inside the tool: checking it in the BOE is on you. |
| Tests | Ready-made topic tests (291,122 questions in the database) and AI-generated tests: 5 per month on Free and 100 on Pro. | Generates questions on demand from what you give it. It has no question bank for your exam and does not keep your results by topic. |
| Mock exams with the call’s structure | Timed mock exams with the number of questions, reserve, time and penalty of the call. | No timer or exam structure. You can ask for questions, but you build the format and the marking yourself. |
| Review of mistakes | Spaced repetition (SM-2) fed by your mistakes in tests and mock exams. | No spaced-repetition system. You would have to keep the record of mistakes yourself. |
| Practical cases | AI-generated and AI-marked practical cases with the citation for each criterion: 50 per month on Pro. | It can mark a case if you give it the statement and the marking criteria. |
| Uses outside the exam | None. It only serves your exam. | All of them: writing, summarising, translating, coding. |
When ChatGPT makes sense
- You already pay for Plus and only need to solve occasional doubts.
- Your exam is not among Oposilab’s 15.
- You want a general tool to write, summarise or prepare outlines.
When Oposilab makes sense
- You want answers limited to the syllabus with a citation you can open and read.
- You want tests, mock exams and review of mistakes already built, not assembled by hand.
- You do not want to verify every citation in the BOE before trusting it.
Frequently asked questions
Does Oposilab use ChatGPT internally?
Oposilab uses third-party language models, but with a design difference: the model only receives the syllabus articles retrieved from the corpus and must cite every statement. The privacy policy lists the providers.
Can I paste my syllabus into ChatGPT and get the same?
You can paste fragments and ask for questions or explanations. What you do not get is the full indexed syllabus, the citation linked to the text, the history of mistakes or the mock exams with the call’s structure.
Which is cheaper?
ChatGPT Go costs €7.99 per month and Plus €22.99 on the Spanish App Store according to the cited source; Oposilab Pro costs €19 per month and has a Free plan. Compare what you need, not just the price.
Sources consulted
- [1] Ranquia, «ChatGPT precio España: Go, Plus y Pro 2026» (actualizado el 14 de agosto de 2026), accessed on 18 September 2026
Oposilab is not affiliated with ChatGPT. The other tool’s data is what its pages published on the stated date and may change; Oposilab’s data comes from its database and plan configuration when this page was generated.
Try it with your own syllabus
Create a free account, pick your exam and ask the tutor a question. You will see the article citation in every answer. 7 days of Pro included, no card.
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