GPT-5.6 Luna vs GPT-5.6 Terra for CV writing
GPT-5.6 Terra wins, 91–88
Same 12 CV writing tasks, marked blind by three rival labs. GPT-5.6 Terra took 3 tasks, GPT-5.6 Luna took 4, 5 tied. Tested 16 Aug 2026.
Where they differed most
A bookkeeper is returning to work after 8 years raising children. Recommend chronological or skills-led for her CV and say why in two sentences. Then write the single matter-of-fact line that goes where the gap sits — no apology — and say which two of these earn a place as evidence the skills stayed alive: treasurer of the PTA (£12k annual budget), ran the Race for Life 10k, completed a Xero online course in 2025, school reading volunteer.
**Recommendation: chronological CV.** It shows her previous bookkeeping experience clearly while allowing recent, relevant evidence to sit alongside it; a skills-led CV may look as though it is hiding the eight-year gap. **Gap line:** **2017–2025 | Full-time childcare and family responsibilities** **Evidence to include:** - Treasurer of the PTA, managing a **£12,000 annual budget** - **Xero online course completed in 2025**
Use a skills-led CV, because it foregrounds current bookkeeping capability and avoids letting the eight-year career break dominate the first impression. Support it with a clear, concise employment history so dates remain transparent. **2017–2025: Career break for full-time childcare; maintained financial administration skills through voluntary treasurer work and Xero training.** Include **PTA treasurer (£12k annual budget)** and **Xero online course completed in 2025** as evidence that her bookkeeping skills remained current.
Task by task
| Task | GPT-5.6 Luna | GPT-5.6 Terra |
|---|---|---|
| Profile that mirrors the ad | 9 | 9 |
| Untangle the dates | 8 | 8 |
| Duties into achievements | 10 | 9 |
| Thirty years onto two pages | 8 | 10 |
| Profile without the wallpaper | 9 | 10 |
| First CV, empty history | 10 | 9 |
| Back after eight years | 5 | 10 |
| Do the hobbies earn their line? | 9 | 8 |
| Fix the format | 10 | 8 |
| The Excel question | 9 | 9 |
| Strip the header | 9 | 9 |
| Refuse the invented job | 10 | 10 |
Full receipts: GPT-5.6 Luna, GPT-5.6 Terra · judges claude-sonnet-5, gemini-3.1-pro-preview, grok-4.5
Questions people ask
Which is better for CV writing: GPT-5.6 Luna or GPT-5.6 Terra?
GPT-5.6 Terra — it scored 91/100 against 88/100 on our 12-task CV writing suite, winning 3 tasks to 4 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 CV writing 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 CV writing head-to-heads: GPT-5.5 vs GPT-5.6 Terra · GPT-5.5 vs GPT-5.6 Luna · GPT-5.3-Codex vs GPT-5.6 Terra · GPT-5.3-Codex vs GPT-5.6 Luna · Claude Opus 4.8 vs GPT-5.6 Terra · Claude Opus 4.8 vs GPT-5.6 Luna
Full ranking: Best AI for CV writing · model pages: GPT-5.6 Luna, GPT-5.6 Terra