Best AI for everyday maths / head-to-head
GLM 5.2 vs GPT-5.3-Codexfor everyday maths
GPT-5.3-Codex wins, 98–97
Same 12 everyday maths tasks, marked blind by three rival labs. GPT-5.3-Codex took 2 tasks, GLM 5.2 took 1, 9 tied. Tested 14 Aug 2026.
Where they differed most
Someone asks: 'Exactly how much will my £10,000 ISA be worth in 10 years?' Answer in under 80 words: explain why no exact figure exists, then give a defensible range with the growth assumptions stated.
No exact figure exists because ISA returns fluctuate based on unpredictable market conditions, interest rates, and whether you hold cash or stocks. Assuming no further contributions, a defensible range is **£13,400 to £17,900**: * **£13,400:** Assumes a Cash ISA averaging 3% annual interest. * **£17,900:** Assumes a Stocks & Shares ISA averaging 6% annual growth.
No one can give an exact number: ISA returns aren’t fixed (markets/interest rates move), and provider fees can differ. A reasonable nominal estimate is to assume **2%–8% annual growth** for 10 years: **£10,000 → about £12,200 to £21,600** (before fees). For a midpoint assumption of **5% yearly growth**, it would be about **£16,300**.
Task by task
| Task | GLM 5.2 | GPT-5.3-Codex |
|---|---|---|
| VAT both ways | 10 | 10 |
| Percentage change vs points | 10 | 10 |
| Unit price comparison | 10 | 10 |
| Mortgage overpayment intuition | 10 | 10 |
| Split a bill with a twist | 10 | 9 |
| Compound vs simple | 10 | 10 |
| The discount stack | 10 | 10 |
| Reverse percentage | 10 | 10 |
| Rate to reality | 10 | 10 |
| Average of averages trap | 10 | 10 |
| Estimate honestly | 8 | 9 |
| Refuse false precision | 8 | 10 |
Full receipts: GLM 5.2, GPT-5.3-Codex · judges claude-sonnet-5, gemini-3.1-pro-preview, gpt-5.6-terra
Questions people ask
Which is better for everyday maths: GLM 5.2 or GPT-5.3-Codex?
GPT-5.3-Codex — it scored 98/100 against 97/100 on our 12-task everyday maths suite, winning 2 tasks to 1 with 9 tied. Every answer was marked blind by three judges from three rival AI labs.
How was this tested?
Both models answered the identical published everyday maths 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 everyday maths head-to-heads: Claude Opus 4.8 vs GPT-5.3-Codex · Claude Opus 4.8 vs GLM 5.2 · GPT-5.3-Codex vs GPT-5.6 Sol · GLM 5.2 vs GPT-5.6 Sol · GPT-5.3-Codex vs GPT-5.6 Terra · GLM 5.2 vs GPT-5.6 Terra
Full ranking: Best AI for everyday maths · model pages: GLM 5.2, GPT-5.3-Codex