What GPT-6.1 Terra is
GPT-6.1 Terra is an OpenAI model that went live on OpenRouter on October 26, 2026. It follows GPT-5.6 Terra. Per standard answer it costs 2.3 times less, $0.0035 against $0.0080, and it keeps the same 1M token context window.
| Released | October 26, 2026 |
| Provider | OpenAI |
| Context window | 1M tokens |
| Input, per million tokens | $1 |
| Output, per million tokens | $5 |
| Credits per message in Whizi | 5 |
| Minimum Whizi plan | Pro |
How to try GPT-6.1 Terra in Whizi
Whizi puts GPT-6.1 Terra in the same model picker as ChatGPT, Claude and Gemini, so there is no separate OpenAI account or API key to set up. Pick a plan on the pricing page, open a new chat, choose GPT-6.1 Terra in the model picker and send your first message.
Each message costs 5 credits, whatever its length. If a question turns out to suit another model better, switch in the same conversation and the thread carries across. See switching models mid-conversation.
What GPT-6.1 Terra costs
List rates are what the provider charges per token. The cost of one standard answer is the more useful number, because it prices the same unit of work across every model regardless of how each one is billed.
| Input, per million tokens | $1 |
| Output, per million tokens | $5 |
| One standard answer | $0.0035 |
| One thousand answers | $3.50 |
| Context window | 1M tokens |
| Credits per message in Whizi | 5 |
| Minimum Whizi plan | Pro |
| Rank by cost, of 134 priced models | 94 |
Prices are the published OpenAI rates as carried by OpenRouter, last refreshed 2026-10-27. The full dataset covering all 152 models from 42 providers is the AI model cost index, which is free to reuse with attribution.
What it costs inside Whizi
Whizi meters messages in credits rather than tokens, and GPT-6.1 Terra is charged at 5 credits per message. The cost does not change with the length of your message or the length of the answer, so a one line question and a long document analysis cost the same.
| Plan | Price per month | Monthly credits | Messages on this model |
|---|---|---|---|
| Pro | $29.99, or $19.99 billed yearly | 2,500 | 500 |
| Powerhouse | $49.99, or $34.99 billed yearly | 10,000 | 2,000 |
GPT-6.1 Terra is included from the Pro plan up. Pro is a curated tier rather than everything cheap: one or two current flagships per model family, each fast tier, and the high volume workhorses. See plans and limits.
- Input $1 and output $5 per million tokens
- $0.0035 for one standard answer, $3.50 for a thousand
- 1M token context window
- 5 credits per message inside Whizi
- Requires the Pro plan or above
- Ranks 94 of 134 priced models by cost per answer
Frequently asked questions
What is GPT-6.1 Terra?
GPT-6.1 Terra is an OpenAI model released on October 26, 2026, with a 1M token context window. It follows GPT-5.6 Terra. Per standard answer it costs 2.3 times less, $0.0035 against $0.0080, and it keeps the same 1M token context window.
How do I use GPT-6.1 Terra?
Sign up for Whizi, open a new chat and choose GPT-6.1 Terra in the model picker. It is available on the Pro plan and above at 5 credits per message, with no OpenAI account or API key needed.
How much does GPT-6.1 Terra cost?
$1 per million input tokens and $5 per million output tokens at list rates, which works out to $0.0035 for one standard answer of 1,000 tokens in and 500 out, or $3.50 for a thousand of them. Inside Whizi it is 5 credits per message on a monthly allowance, rather than metered per token.
Which Whizi plan includes GPT-6.1 Terra?
Pro and above, which is $29.99 per month or $19.99 billed yearly. At 5 credits per message, a Pro allowance of 2,500 credits covers 500 messages on this model if you spend the whole allowance here, and most people mix in a 1 credit model for routine work so it goes further.
