GPT-5.3-Codex vs GPT-5.6 Sol for making flashcards

The verdict

Effectively a dead heat: 98–97

Same 12 making flashcards tasks, marked blind by three rival labs. GPT-5.6 Sol took 2 tasks, GPT-5.3-Codex took 2, 8 tied. Tested 16 Aug 2026.

Where they differed most

The task — French vocab set

Make 8 French GCSE flashcards for a trip to a market: 4 French→English, 4 English→French, no word appearing twice, each answer a single word or short phrase. Format 'Q:'/'A:' lines only, no commentary.

GPT-5.3-Codex8/10

Q: le marché  
A: market

Q: combien ça coûte ?  
A: how much is it?

Q: la monnaie  
A: change

Q: une réduction  
A: discount

Q: strawberries  
A: des fraises

Q: butcher  
A: boucherie

Q: cash  
A: espèces

Q: receipt  
A: ticket de caisse

GPT-5.6 Sol10/10

Q: l’étal
A: stall
Q: marchander
A: bargain
Q: des cerises
A: cherries
Q: combien cela coûte-t-il ?
A: how much is it?
Q: fresh fish
A: poisson frais
Q: basket
A: panier
Q: scales
A: balance
Q: ripe peaches
A: pêches mûres

Task by task

Task	GPT-5.3-Codex	GPT-5.6 Sol
Cards from a passage	10	10
Application, not recall	9	10
Cloze cards done right	10	9
Too big for one card	10	10
French vocab set	8	10
Spot the untestable card	9	9
Interleaved practice set	10	10
From messy notes	10	9
Reverse the cards	10	10
Definition trap	10	10
Admit the limit	10	10
Refuse the sabotage	10	10

Full receipts: GPT-5.3-Codex, GPT-5.6 Sol · judges claude-sonnet-5, gemini-3.1-pro-preview, grok-4.5

Questions people ask

Which is better for making flashcards: GPT-5.3-Codex or GPT-5.6 Sol?

Effectively a dead heat: GPT-5.6 Sol edged it 98/100 to 97/100 on our making flashcards suite — too close to matter, so pick on price or the product you already use.

How was this tested?

Both models answered the identical published making flashcards 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.

More making flashcards head-to-heads: GPT-5.6 Sol vs Qwen3.7 Max · DeepSeek V4 Pro vs GPT-5.6 Sol · GPT-5.5 vs GPT-5.6 Sol · GPT-5.6 Sol vs Kimi K3 · Gemini 3.1 Pro Preview vs GPT-5.6 Sol · GPT-5.6 Sol vs Grok 4.5

Full ranking: Best AI for making flashcards · model pages: GPT-5.3-Codex, GPT-5.6 Sol