Best AI for revision & study / head-to-head
GPT-5.3-Codex vs GPT-5.5 for revision & study
GPT-5.5 wins, 92–88
Same 12 revision & study tasks, marked blind by three rival labs. GPT-5.5 took 5 tasks, GPT-5.3-Codex took 2, 5 tied. Tested 14 Aug 2026.
Where they differed most
Plan a 12-mark GCSE history answer on 'How far was the Treaty of Versailles responsible for the rise of Hitler?' Give: a one-line judgement, 3 paragraph topics (one line each), and what the counter-paragraph concedes. No essay, just the plan, under 120 words.
**Judgement:** The Treaty of Versailles was an important long-term cause, but Hitler rose mainly because the Great Depression and Weimar political weakness created the immediate conditions for Nazi success. **Para 1 (agree):** Versailles fuelled resentment (“Diktat”), war guilt, reparations, and territorial losses, giving Hitler powerful nationalist propaganda. **Para 2 (main factor):** The 1929 Depression caused mass unemployment and desperation; Nazi promises of jobs, unity, and strength won millions of new voters. **Para 3 (other factor):…
**Judgement:** The Treaty of Versailles helped Hitler rise by creating anger and instability, but the Depression was more important in turning resentment into votes. **Paragraph 1:** Versailles caused humiliation, reparations, lost land and “stab-in-the-back” anger, which Hitler exploited. **Paragraph 2:** The Depression made Weimar collapse economically, increasing unemployment and support for extremist parties like the Nazis. **Paragraph 3:** Hitler’s leadership, propaganda and SA intimidation made the Nazis seem like a strong alternative.…
Task by task
| Task | GPT-5.3-Codex | GPT-5.5 |
|---|---|---|
| Condense a topic | 9 | 10 |
| Flashcards that test | 10 | 10 |
| Explain then check | 9 | 10 |
| The exam answer plan | 5 | 9 |
| Mnemonic that works | 10 | 6 |
| Spot the misconception | 10 | 10 |
| Timetable the revision | 8 | 8 |
| Simplify without losing truth | 9 | 9 |
| Quiz from notes | 9 | 10 |
| Compare for the exam | 9 | 8 |
| The night-before triage | 8 | 10 |
| Refuse to do the homework | 10 | 10 |
Full receipts: GPT-5.3-Codex, GPT-5.5 · judges claude-sonnet-5, gemini-3.1-pro-preview, grok-4.5
Questions people ask
Which is better for revision & study: GPT-5.3-Codex or GPT-5.5?
GPT-5.5 — it scored 92/100 against 88/100 on our 12-task revision & study suite, winning 5 tasks to 2 with 5 tied. Every answer was marked blind by three judges from three rival AI labs.
How was this tested?
Both models answered the identical published revision & study tasks. Three AI judges from three different labs scored every answer blind against a fixed rubric; mechanically checkable rules (word limits, banned phrases) are enforced by the test harness in code. The raw outputs and judge verdicts are downloadable.
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Full ranking: Best AI for revision & study · model pages: GPT-5.3-Codex, GPT-5.5