OpenAI · Strong all-rounder
Write fiction with GPT-6.1 Terra
Yes. On WriteWithPaige, writers on a paid plan can pick GPT-6.1 Terra, made by OpenAI, for any reply in their story. It reads your chapters and Story Bible and writes into your book, the same way Paige does. Each GPT-6.1 Terra reply uses credits: about 16–45 for a chat reply and about 20–56 for a new chapter. Paige stays the default and is included in every plan.
Updated October 26, 2026
GPT-6.1 Terra at a glance
- Made by
- OpenAI
- Released
- October 26, 2026(OpenAI: Introducing GPT-6.1 Terra)
- Context window
- About 1 million tokens (1,050,000)(OpenAI: GPT-6.1 Terra model docs)
- Group on WriteWithPaige
- Strong all-rounder
- Credits a reply
- About 16–45 for chat, 18–54 to continue, 20–56 for a new chapter
What OpenAI says: OpenAI calls it a fast, efficient model with "clearer, more natural writing", priced at half of GPT-6.1 Sol.(OpenAI: Introducing GPT-6.1 Terra)
What GPT-6.1 Terra is good at, and where it's weaker
Good for
- OpenAI says it finishes tasks over three times faster than GPT-6.1 Sol, at half the price per token.(OpenAI: Introducing GPT-6.1 Terra)
- On OpenAI's internal factuality benchmark its error rate at max effort fell to 4.3%, close to the far pricier GPT-6 Astra. Fewer invented details matters when a model is tracking your story bible.(OpenAI: Introducing GPT-6.1 Terra)
Weaker at
- OpenAI still points to GPT-6.1 Sol and GPT-6 Astra for its hardest work; Terra is built for speed and cost.(OpenAI: Introducing GPT-6.1 Terra)
- It launched October 26, 2026, so no independent test of its fiction prose exists yet.
GPT-6.1 Terra or Paige?
Paige
Built for fiction and included in every plan. She knows the workspace best, runs Adventures, and writes the scenes you ask for within our content rules. No credits.
GPT-6.1 Terra
A second voice from OpenAI. OpenAI's newest. Half the credits of Sol, with faster replies. It follows OpenAI's content rules and uses about 16–45 credits a chat reply.
A simple way to choose: write with Paige, and when a scene stalls, ask GPT-6.1 Terra for the same scene. Keep the reply you like.
GPT-6.1 Terra compared with similar models
Same story, same workspace. These differ in voice, speed and credits.
| Model | Maker | Group | Best for in fiction | Context | Credits a replychat · continue · new chapter |
|---|---|---|---|---|---|
| GPT-6.1 Terra | OpenAI | Strong all-rounder | OpenAI's newest. Half the credits of Sol, with faster replies. | 1M tokens | 16–45 · 18–54 · 20–56 |
| GPT-6.1 Sol | OpenAI | Strong all-rounder | Fast, sharp and clean. A great everyday choice. | 1M tokens | 32–89 · 36–107 · 40–112 |
| Gemini 4 Argon | Strong all-rounder | Strong all-rounder with a huge memory for long books. | 1M tokens | 32–89 · 36–107 · 40–112 | |
| Claude Opus 5.5 | Anthropic | Strong all-rounder | Careful with long stories and subtle character work. | 1M tokens | 63–177 · 72–214 · 79–223 |
Try GPT-6.1 Terra in three steps
- 1
Create a free account
Start with Paige on a real chapter.
- 2
Choose a paid plan
Other models are part of every paid plan. Paige stays included.
- 3
Pick GPT-6.1 Terra
Tap "Writing with: Paige" beside the chat box and choose GPT-6.1 Terra. Add credits when you need them: packs from US$10 (€10 in the eurozone) for 1,000 credits.
Frequently asked questions
Can I write a novel with GPT-6.1 Terra?
Yes. On WriteWithPaige, writers on a paid plan can pick GPT-6.1 Terra, made by OpenAI, for any reply in their story. It reads your chapters and Story Bible and writes into your book, the same way Paige does. Each GPT-6.1 Terra reply uses credits: about 16–45 for a chat reply and about 20–56 for a new chapter. Paige stays the default and is included in every plan.
How many credits does GPT-6.1 Terra use?
About 16–45 credits for a chat reply, 18–54 to continue a chapter, and 20–56 for a new chapter. The lower number is a typical reply; the higher one is a long reply deep into a big book, because the model reads more of your story. Every reply shows what it used. Credits come in packs from US$10 (€10 in the eurozone) for 1,000 credits.
Does GPT-6.1 Terra use my plan's daily messages?
No. Replies from GPT-6.1 Terra are paid with credits, so they don't count against Paige's daily allowance. Switch back to Paige and your plan works as before.
Will GPT-6.1 Terra write everything Paige writes?
Not always. GPT-6.1 Terra follows OpenAI's content rules, so it may turn down some requests or tone a scene down. Paige is one tap away and is included in your plan.
Do I need a OpenAI account or API key?
No. You pick GPT-6.1 Terra inside WriteWithPaige and pay with credits. There is nothing to set up with OpenAI.
Is GPT-6.1 Terra better than Paige?
It depends on the scene. Paige is built for fiction, knows the workspace best and costs nothing extra. GPT-6.1 Terra gives you a second voice: try it on a scene you're stuck on and keep whichever reply you like. Adventures always run on Paige.
Keep exploring
All AI models
Every model you can write with, side by side, with credits per reply.
GPT-6.1 Terra vs GPT-6.1 Sol
Head-to-head for fiction writers.
Write fiction with GPT-6.1 Sol
Fast, sharp and clean. A great everyday choice.
Write fiction with Gemini 4 Argon
Strong all-rounder with a huge memory for long books.
Write fiction with Claude Opus 5.5
Careful with long stories and subtle character work.
AI fiction writer
How Paige drafts, continues and edits a novel with you.
Best AI tools for fiction
How the main AI writing tools compare for novelists.
Plans and pricing
What each plan includes. Paige comes with every plan.
Sources
Facts about each model come from its maker and the reviews below. Credit ranges come from WriteWithPaige. We don't publish our own benchmark scores.
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