By the toolist.ai editors. Researched from public sources, not hands-on tested by toolist.ai. Updated October 27, 2026; prices checked October 27, 2026.
GPT-6.1 Terra: price, context window and benchmarks
GPT-6.1 Terra is OpenAI's GPT-6.1 model for visual reasoning, computer use and writing, at $1 per million input tokens and $5 per million output tokens, half the price of GPT-6.1 Sol. Artificial Analysis puts it at 51 on its Intelligence Index at max effort and 38 at medium, the API default, and measures about 91 output tokens a second.
Best for
- Product photos, technical drawings and application screens, which OpenAI says the model is built for
- Computer-use agents and clear, natural writing at half the token price of GPT-6.1 Sol
- High-volume work that reuses prompts, since cached input costs $0.05 per million tokens
Key facts
| Fact | GPT-6.1 Terra | Source |
|---|---|---|
| Provider | OpenAI | OpenAI API docs: Pricing |
| API model name | gpt-6.1-terra | OpenAI API docs: GPT-6.1 Terra |
| Released | October 26, 2026 | OpenAI API docs: Changelog |
| Input price | $1 per million tokens | OpenAI API docs: Pricing |
| Cached input price | $0.05 per million tokens | OpenAI API docs: Pricing |
| Output price | $5 per million tokens | OpenAI API docs: Pricing |
| Context window | 1,050,000 tokens | OpenAI API docs: GPT-6.1 Terra |
| Maximum output | 128,000 tokens | OpenAI API docs: GPT-6.1 Terra |
| Knowledge cutoff | June 1, 2026 | OpenAI API docs: GPT-6.1 Terra |
| Input and output | Text and images in; text out | OpenAI API docs: GPT-6.1 Terra |
| Reasoning | Effort levels none to max; medium is the API default. Tool calling requires the Responses API | OpenAI API docs: GPT-6.1 Terra |
| API and cloud platforms | OpenAI API (Responses, Chat Completions and Batch) | OpenAI API docs: GPT-6.1 Terra |
Prompts over 272,000 input tokens cost twice the input and cache rates and 1.5 times the output rate for the whole request. Batch and Flex cost half; Fast mode costs double. Cache writes cost $1.25 per million tokens with 30-minute retention and $2.50 with 12-hour retention.
What GPT-6.1 Terra costs a month
Three typical workloads, priced at the standard API rates above. We calculated these; the provider does not publish them.
| Workload | Tokens a month | Cost a month |
|---|---|---|
| Support chatbot 100,000 replies, each 3,000 input and 400 output tokens, no caching | 300M in, 40M out | $500 |
| Document Q&A 5,000 questions over the same 60,000-token document set (90% cache hits), 800 output tokens each | 300M in, 4M out | $63.50 |
| Coding agent 200 tasks, each 1.5 million input tokens (90% cache hits) and 50,000 output tokens | 300M in, 10M out | $93.50 |
Reasoning models bill their thinking as output tokens, so heavy reasoning can raise the output count several times. Cache-write charges are not included.
Benchmarks
| Benchmark | Score | Source |
|---|---|---|
| Artificial Analysis Intelligence Index max effort | 51.0 | Artificial Analysis: GPT-6.1 Terra (max) |
| Intelligence Index at everyday effort medium effort, the API default | 38.0 | Artificial Analysis: GPT-6.1 Terra (medium) |
Speed: about 91 output tokens a second (medium effort, Artificial Analysis; Artificial Analysis: GPT-6.1 Terra (medium)).
Benchmark and speed data marked as such come from Artificial Analysis.
What changed
Released on October 26, 2026, at half the token prices of GPT-6.1 Sol and with half its cached-input price. OpenAI describes it as a fast, efficient model for visual reasoning, precise computer use and clear, natural writing. (OpenAI API docs: GPT-6.1 Terra)
GPT-6.1 Terra compared
Other models
- Gemini 4 Argon: $2 in, $10 out per million tokens
- Muse Wonder: $4 in, $20 out per million tokens
- Claude Haiku 5.5: $0.10 in, $0.50 out per million tokens
- GPT-6.1 Sol: $2 in, $10 out per million tokens
- Claude Sonnet 5.5: $2 in, $10 out per million tokens
- Claude Opus 5.5: $4 in, $20 out per million tokens
- GPT-6 Luna: $0.10 in, $0.50 out per million tokens
- GPT-6 Sol: $2 in, $10 out per million tokens
- GPT-6 Astra: $10 in, $50 out per million tokens
- Claude Fable 5.1: $10 in, $50 out per million tokens
- Claude Opus 5: $5 in, $25 out per million tokens
All prices side by side: AI model API price table. How we research: our method.
Sources
- OpenAI API docs: GPT-6.1 Terra (checked 2026-10-27)
- OpenAI API docs: Pricing (checked 2026-10-27)
- OpenAI API docs: Changelog (checked 2026-10-27)
- Artificial Analysis: GPT-6.1 Terra (max) (checked 2026-10-27)
- Artificial Analysis: GPT-6.1 Terra (medium) (checked 2026-10-27)
- OpenRouter: GPT-6.1 Terra (checked 2026-10-27)