# OpenAI GPT-6.1 Terra API

> GPT-6.1 Terra is the middle tier of OpenAI's GPT-6.1 family and the replacement for GPT-5.6 Terra, with text and image input. OpenAI positions it for everyday agentic, coding and writing work, with particular gains in visual reasoning over screenshots and documents and in computer use, at half the price of GPT-6.1 Sol. Reasoning effort ranges from none to max with medium as the default; choose GPT-6.1 Sol for harder work or GPT-6 Luna for the highest-volume tasks.

Source: https://www.sandbase.ai/model/openai/gpt-6.1-terra
API reference: https://www.sandbase.ai/model/openai/gpt-6.1-terra/docs

## Facts

- Provider: OpenAI
- Type: Language model
- Model ID: `openai/gpt-6.1-terra`
- Price: $1 per 1M input tokens, $5 per 1M output tokens
- Context window: 1.1M tokens, up to 128K output tokens
- Capabilities: chat, vision, reasoning, structured output, function calling
- Billing: pay per use from one SandBase balance; no provider account or subscription needed

## Call it

- Responses API: `POST https://api.sandbase.ai/v1/responses`
- Chat Completions API: `POST https://api.sandbase.ai/v1/chat/completions`

```bash
curl -X POST https://api.sandbase.ai/v1/responses \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "openai/gpt-6.1-terra",
  "input": "Hello",
  "max_output_tokens": 2048
}'
```

## FAQ

### How do I call OpenAI GPT-6.1 Terra through SandBase?

Create a SandBase API key, then send requests with the model ID "openai/gpt-6.1-terra" to Responses API (/v1/responses) or Chat Completions API (/v1/chat/completions) at https://api.sandbase.ai. The request examples on this page show the exact payload.

### How much does OpenAI GPT-6.1 Terra cost?

$1 per 1M input tokens and $5 per 1M output tokens, billed per request from your SandBase balance. Discounts, when available, are shown in the pricing on this page.

### What is the context window of OpenAI GPT-6.1 Terra?

1.1M tokens of context, with up to 128K output tokens per response.

### Which features does OpenAI GPT-6.1 Terra support?

OpenAI GPT-6.1 Terra supports vision (image input), reasoning, function calling, structured output. See Specifications above for the full list.

### Do I need a separate OpenAI account?

No. One SandBase API key and balance gives you access to OpenAI GPT-6.1 Terra and the other models in the catalog; you do not need to sign up with OpenAI separately.