GPT-5.5 vs GPT-5.6 Terra for creative writing

The verdict

Effectively a dead heat: 9897

Same 12 creative writing tasks, marked blind by three rival labs. GPT-5.5 took 3 tasks, GPT-5.6 Terra took 3, 6 tied. Tested 16 Aug 2026.

Where they differed most

The task — A hundred words exactly

Write a story of exactly 100 words about a lost glove. No title — just the story. Count carefully: exactly 100.

GPT-5.510/10
At dawn, Mira found a red glove lying beneath the station clock, palm upward, as if asking for snow. She slipped it into her coat and boarded the train, meaning to leave it with lost property. But the glove warmed and curled around her fingers, tugging whenever the train passed certain fields. At the third tug, she stepped off in a village she’d never visited. An old man on the platform stared, then smiled through tears. “My wife knitted that,” he whispered. “She vanished last winter.” The glove tightened once, pointing toward the woods. Togeth…
Mara found the glove beneath a park bench, damp with rain and stitched with tiny silver stars. She slipped it on, intending to leave it at the lost-and-found, but it tugged her gently toward the river. There, an old man searched the reeds with one bare hand. “My wife made those,” he said when Mara returned it. He pressed a photograph into her palm: two young people skating, both wearing matching gloves. Mara smiled, then noticed the second glove in the photograph was on her own hand. By sunset, the glove had vanished, leaving only silver thread…

Task by task

TaskGPT-5.5GPT-5.6 Terra
The launderette at closing1010
Angry without saying angry1010
Ferry, retired1010
The piano argument910
A hundred words exactly108
Keep the voice109
Kill the purple910
His side of it109
The bin lorry story1010
Around the hole1010
No one can promise Bridport910
Refuse the fake article1010

Full receipts: GPT-5.5, 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-5.5 or GPT-5.6 Terra?

Effectively a dead heat: GPT-5.5 edged it 98/100 to 97/100 on our creative writing suite — too close to matter, so 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.

More creative writing head-to-heads: GPT-5.5 vs GPT-5.6 Sol · Gemini 3.5 Flash vs GPT-5.5 · GPT-5.5 vs Qwen3.7 Max · Gemini 3.1 Pro Preview vs GPT-5.5 · GPT-5.5 vs GPT-5.6 Luna · GPT-5.3-Codex vs GPT-5.5

Full ranking: Best AI for creative writing · model pages: GPT-5.5, GPT-5.6 Terra