GPT-6.1 Terra

Q: What is the API model name for GPT-6.1 Terra?

Use gpt-6.1-terra in API calls to OpenAI. The context window is 1.05M tokens, and a response can run to 128,000 output tokens.

GPT-6.1 Terra API pricing is $1 per million input tokens and $5 per million output tokens.

Provider: OpenAI
API model name: gpt-6.1-terra
Status: Current
Input, $ per 1M tokens: $1.00
Cached input, $ per 1M tokens: $0.05
Output, $ per 1M tokens: $5.00
Sample request (10K in, 2K out), $: $0.02
Context window, tokens: 1.05M
Price checked on: October 31, 2026
Official pricing page: developers.openai.com

These are standard rates on OpenAI’s own API. Cached input is billed at $0.05 per million tokens, a twentieth of the input rate. A request with 10,000 input tokens and 2,000 output tokens costs about $0.02 before caching or batch discounts. The API model name is gpt-6.1-terra, and the context window is 1.05M tokens. GPT-6.1 Sol runs the same request for about $0.04.

Cache writes, $ per 1M tokens: $1.25
Max output, tokens: 128K
Input types: Text, image
Open weights: No
Long-context pricing: $2 input, $0.10 cached input, $2.50 cache writes, $7.50 output
Batch pricing: 50% off standard rates
Pricing notes: Long-context rates apply to the whole request once a prompt exceeds 272K input tokens. Fast mode costs 2x standard rates.
Sources: Page URL Checked
OpenAI API pricing https://developers.openai.com/api/docs/pricing 2026-10-27
OpenAI GPT-6.1 Terra model page (context and output limits) https://developers.openai.com/api/docs/models/gpt-6.1-terra 2026-10-27

Page	URL	Checked
OpenAI API pricing	https://developers.openai.com/api/docs/pricing	2026-10-27
OpenAI GPT-6.1 Terra model page (context and output limits)	https://developers.openai.com/api/docs/models/gpt-6.1-terra	2026-10-27

Questions

How much does the GPT-6.1 Terra API cost?

GPT-6.1 Terra costs $1 per million input tokens and $5 per million output tokens on OpenAI’s own API. Cached input costs $0.05 per million tokens.

What is the API model name for GPT-6.1 Terra?

Use gpt-6.1-terra in API calls to OpenAI. The context window is 1.05M tokens, and a response can run to 128,000 output tokens.

What does one GPT-6.1 Terra request cost?

A request with 10,000 input tokens and 2,000 output tokens costs about $0.02 at standard rates, before caching or batch discounts. Batch requests get 50% off standard rates.

Does GPT-6.1 Terra cost more for long prompts?

Yes. OpenAI lists long-context rates per million tokens: $2 input, $0.10 cached input, $2.50 cache writes, $7.50 output. Long-context rates apply to the whole request once a prompt exceeds 272K input tokens.

Sources

Prices are read from each provider’s official pricing page: OpenAI, Anthropic, Google Gemini API, xAI, DeepSeek and Mistral AI. Context and output limits that a provider does not publish come from OpenRouter’s model listing. Each model’s Sources field lists the pages used and the date each was checked. How we check prices · Price change log