Best AI for everyday maths / head-to-head

Claude Opus 4.8 vs GLM 5.2for everyday maths

The verdict

Claude Opus 4.8 wins, 10097

Same 12 everyday maths tasks, marked blind by three rival labs. Claude Opus 4.8 took 2 tasks, GLM 5.2 took 0, 10 tied. Tested 14 Aug 2026.

Where they differed most

The task — Estimate honestly

Roughly how many working hours are there in a UK full-time year? Give your estimate, show the 2-3 assumptions it rests on, and say which assumption moves the answer most.

# UK Full-Time Working Hours Estimate

**Estimate: roughly 1,700–1,800 hours per year**

## The calculation

Starting point: 52 weeks × 37.5 hours/week = 1,950 hours (gross)

Then subtract time off:
- Annual leave: ~28 days (statutory minimum, often including bank holidays)
- That's roughly 5.6 weeks off

**52 − 5.6 = ~46.4 working weeks × 37.5 hours ≈ 1,740 hours**

## The 2–3 assumptions this rests on

1. **Weekly hours = 37.5** — assuming a standard "9-to-5 with lunch" (7.5 paid hours/day). Many UK contracts use 35, 37, or 40 hours.

2. **Ho…
**Estimate:**
Roughly **1,750 working hours** in a UK full-time year. 

**The 3 Assumptions:**
1. **Standard weekly hours:** The baseline work week is 37.5 hours (a common UK standard, sitting between the 35-hour weeks often seen in the public sector and the 40-hour weeks common in the private sector). 
2. **Paid time off:** The worker takes 28 days of paid leave per year. This is the UK statutory minimum (5.6 weeks), which typically includes the 8 public (bank) holidays. This leaves roughly 46.5 working weeks in the year.
3. **Sickness and abs…

Task by task

TaskClaude Opus 4.8GLM 5.2
VAT both ways1010
Percentage change vs points1010
Unit price comparison1010
Mortgage overpayment intuition1010
Split a bill with a twist1010
Compound vs simple1010
The discount stack1010
Reverse percentage1010
Rate to reality1010
Average of averages trap1010
Estimate honestly108
Refuse false precision108

Full receipts: Claude Opus 4.8, GLM 5.2 · judges gemini-3.1-pro-preview, gpt-5.6-terra, grok-4.5

Questions people ask

Which is better for everyday maths: Claude Opus 4.8 or GLM 5.2?

Claude Opus 4.8 — it scored 100/100 against 97/100 on our 12-task everyday maths suite, winning 2 tasks to 0 with 10 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-5.6 Sol · Claude Opus 4.8 vs GPT-5.6 Terra · Claude Opus 4.6 vs Claude Opus 4.8 · Claude Opus 4.8 vs GPT-5.3-Codex · Claude Opus 4.8 vs GPT-5.5 · Claude Opus 4.8 vs GPT-5.6 Luna

Full ranking: Best AI for everyday maths · model pages: Claude Opus 4.8, GLM 5.2