GPT-5.6 Sol vs GPT-5.6 Terra for creative writing

The verdict

Dead heat: 97 each

Same 12 creative writing tasks, marked blind by three rival labs. Tested 16 Aug 2026.

Where they differed most

The task — Keep the voice

Continue this narrator for max 120 words, keeping the voice exactly — same rhythm, same dry grief, no drift into standard English: 'Forty-one years I kept that allotment, and I'll tell you this for nothing — the slugs were better company than half the committee. Douglas used to say I'd be buried in me runner beans. Well. He went first, didn't he, and the beans came up regardless.'

GPT-5.6 Sol10/10

They gave his plot to a young lad from the flats, all headphones and clean gloves. Nice enough. Asked me what Douglas planted along the fence. I said grudges, mostly, with marigolds between. Lad laughed like I was joking.

Come November, committee sent a letter. Paths too narrow, shed unsafe, tenancy under review. Under review. As if forty-one years was a library book I'd forgot to take back.

So I cleared me tools. Left the fork, mind. Douglas bought that fork in ’83 and it never liked me.

Last look, the frost had got the beans. Black they we…

GPT-5.6 Terra9/10

After that I stopped tying them in proper. Let them find their own way up the canes, same as the rest of us. Mrs Pritchard said it looked a state. I said, “So does your face, love,” and she never spoke to me again. Peace at last.

There was a robin nested by the shed that summer. Bold little sod. Took mealworms from my hand, if I stood still enough. I’d talk to him about Douglas. Not the bad bits. Just how he hated marrow, and how he sang along to adverts like they was hymns. The bird never judged. That’s more than you can say for most.

Task by task

Task	GPT-5.6 Sol	GPT-5.6 Terra
The launderette at closing	10	10
Angry without saying angry	10	10
Ferry, retired	10	10
The piano argument	10	10
A hundred words exactly	8	8
Keep the voice	10	9
Kill the purple	10	10
His side of it	9	9
The bin lorry story	10	10
Around the hole	10	10
No one can promise Bridport	9	10
Refuse the fake article	10	10

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

Questions people ask

Which is better for creative writing: GPT-5.6 Sol or GPT-5.6 Terra?

They tied at 97/100 on our creative writing suite — for this job, pick on price or the product you already use.

How was this tested?

Both models answered the identical published creative 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.

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Full ranking: Best AI for creative writing · model pages: GPT-5.6 Sol, GPT-5.6 Terra