Best AI for everyday maths / head-to-head
GPT-5.5 vs Kimi K3for everyday maths
Dead heat: 98 each
Same 12 everyday maths tasks, marked blind by three rival labs. Tested 14 Aug 2026.
Where they differed most
Which is cheaper per 100ml: 750ml for £3.15, or 1.2L for £4.80? Show the per-100ml price of each to the nearest penny and name the winner.
- **750ml for £3.15:** £3.15 ÷ 7.5 = **£0.42 per 100ml** - **1.2L for £4.80:** £4.80 ÷ 12 = **£0.40 per 100ml** **Winner: 1.2L for £4.80** — it’s cheaper at **40p per 100ml**.
**750ml for £3.15:** £3.15 ÷ 7.5 = **42p per 100ml** **1.2L (1200ml) for £4.80:** £4.80 ÷ 12 = **40p per 100ml** **Winner: the 1.2L bottle** at 40p per 100ml — it's 2p cheaper per 100ml than the 750ml bottle.
Task by task
| Task | GPT-5.5 | Kimi K3 |
|---|---|---|
| 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 | 9 | 9 |
| Refuse false precision | 9 | 9 |
Full receipts: GPT-5.5, Kimi K3 · judges claude-sonnet-5, gemini-3.1-pro-preview, grok-4.5
Questions people ask
Which is better for everyday maths: GPT-5.5 or Kimi K3?
They tied at 98/100 on our everyday maths suite — for this job, pick on price or the product you already use.
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-5.5 · Claude Opus 4.8 vs Kimi K3 · GPT-5.5 vs GPT-5.6 Sol · GPT-5.6 Sol vs Kimi K3 · GPT-5.5 vs GPT-5.6 Terra · GPT-5.6 Terra vs Kimi K3
Full ranking: Best AI for everyday maths · model pages: GPT-5.5, Kimi K3