# OpenAI: gpt-5.6-terra

- Model ID: `gpt-5.6-terra`
- Provider: OpenAI
- Web version: https://www.moleapi.com/en/models/openai/gpt-5.6-terra
- Content status: verified

## Model introduction

GPT-5.6 Terra is the balanced tier in OpenAI's GPT-5.6 family, positioned between Sol's maximum capability and Luna's lower operating cost.

## Model capabilities

- OpenAI compatible
- Responses API
- Anthropic compatible
- Gemini compatible
- Image generation
- Vision
- Prompt cache
- Reasoning

### Verified specifications

- Official positioning: GPT-5.6 model balancing intelligence and cost
- Context window: 1,050,000 tokens
- Maximum output: 128,000 tokens
- Knowledge cutoff: 2026-02-16
- Input / output: Text, image / Text

## Model pricing and access

Pricing is supplied dynamically by the MoleAPI console API.

### Standard (default, x1)

| Tier | Condition | Input | Output | Cache read | Cache write | Image input | Image output |
| --- | --- | ---: | ---: | ---: | ---: | ---: | ---: |
| standard | Length ≤ 272K | $2 | $12 | $0.2 | $2.5 | $8 | $30 |
| long_context | - | $4 | $18 | $0.4 | $5 | $8 | $30 |

### Discount (discount, x0.8)

| Tier | Condition | Input | Output | Cache read | Cache write | Image input | Image output |
| --- | --- | ---: | ---: | ---: | ---: | ---: | ---: |
| standard | Length ≤ 272K | $1.6 | $9.6 | $0.16 | $2 | $6.4 | $24 |
| long_context | - | $3.2 | $14.4 | $0.32 | $4 | $6.4 | $24 |

### Relay (relay, x0.3)

| Tier | Condition | Input | Output | Cache read | Cache write | Image input | Image output |
| --- | --- | ---: | ---: | ---: | ---: | ---: | ---: |
| standard | Length ≤ 272K | $0.6 | $3.6 | $0.06 | $0.75 | $2.4 | $9 |
| long_context | - | $1.2 | $5.4 | $0.12 | $1.5 | $2.4 | $9 |

### Temporary (availability may vary) (temp, x0.1)

| Tier | Condition | Input | Output | Cache read | Cache write | Image input | Image output |
| --- | --- | ---: | ---: | ---: | ---: | ---: | ---: |
| standard | Length ≤ 272K | $0.2 | $1.2 | $0.02 | $0.25 | $0.8 | $3 |
| long_context | - | $0.4 | $1.8 | $0.04 | $0.5 | $0.8 | $3 |

### Access protocols

| Protocol | Method | Endpoint |
| --- | --- | --- |
| openai | POST | /v1/chat/completions |
| openai-response | POST | /v1/responses |
| anthropic | POST | /v1/messages |
| gemini | POST | /v1beta/models/{model}:generateContent |
| image-generation | POST | /v1/images/generations |
| openai-response-compact | POST | /v1/responses/compact |
| openai-alpha-search | POST | /v1/alpha/search |

- Live pricing source: https://home.moleapi.com/api/pricing

## About gpt-5.6-terra

GPT-5.6 Terra is OpenAI’s balanced GPT-5.6 model for everyday work, positioned between the flagship Sol model and the cost-efficient Luna model. OpenAI presents the GPT-5.6 family for agentic workflows, coding, knowledge work, computer use, and tool orchestration. [6]

## Positioning and core capabilities

GPT-5.6 Terra is the balanced tier in OpenAI’s generally available GPT-5.6 model family. It is positioned for workloads that need a balance of capability and cost rather than the flagship positioning of Sol. [6]

OpenAI describes GPT-5.6 as improving work per token across coding, knowledge work, tool use, computer use, and security-oriented tasks. [6]

## Capabilities and specs

GPT-5.6 supports Programmatic Tool Calling in the Responses API, enabling lightweight programs to coordinate tools, process intermediate results, monitor progress, and select subsequent actions. [6]

OpenAI also describes a multi-agent beta in the Responses API for building workflows that coordinate parallel agents. [6]

| Specification | Details |
| --- | --- |
| Model family position | Balanced model for everyday work [6] |
| Family availability | Generally available [6] |
| Tool orchestration | Programmatic Tool Calling in the Responses API [6] |
| Multi-agent workflows | Responses API multi-agent beta [6] |

## Use cases

GPT-5.6 Terra is positioned for everyday professional work that combines reasoning with controlled operating cost. [6]

The GPT-5.6 family’s stated strengths support coding assistance, knowledge-work automation, computer-use workflows, and agentic systems that coordinate external tools and intermediate results. [6]

## Material limitations

Terra is not OpenAI’s flagship GPT-5.6 tier; Sol occupies that position, while Luna is the family’s most cost-efficient model. [6]

Terra’s product positioning centers on balancing capability and cost, rather than maximizing the capability profile represented by Sol. [6]

## Sources

- [6] [OpenAI: GPT-5.6: Frontier intelligence that scales with your ambition](https://openai.com/index/gpt-5-6/)


## Code examples

### cURL

```bash
curl https://api.moleapi.com/v1/responses \
  -H "Authorization: Bearer $MOLEAPI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"gpt-5.6-terra","input":"Explain this problem step by step."}'
```

### Python

```python
from openai import OpenAI

client = OpenAI(base_url="https://api.moleapi.com/v1", api_key="YOUR_MOLEAPI_API_KEY")
response = client.responses.create(model="gpt-5.6-terra", input="Explain this problem step by step.")
print(response.output_text)
```

### TypeScript

```typescript
import OpenAI from "openai";

const client = new OpenAI({ baseURL: "https://api.moleapi.com/v1", apiKey: process.env.MOLEAPI_API_KEY });
const response = await client.responses.create({ model: "gpt-5.6-terra", input: "Explain this problem step by step." });
console.log(response.output_text);
```

## More related models

- [gpt-5.6-luna](https://www.moleapi.com/en/models/openai/gpt-5.6-luna) — OpenAI
- [gpt-5.6-sol](https://www.moleapi.com/en/models/openai/gpt-5.6-sol) — OpenAI
- [gpt-5.5](https://www.moleapi.com/en/models/openai/gpt-5.5) — OpenAI

## Frequently asked questions

### How is gpt-5.6-terra priced?

Prices are read from the MoleAPI console API and update with model prices, context tiers, and account groups.

### How can I access gpt-5.6-terra?

The catalog currently lists openai, openai-response, anthropic, gemini, image-generation, openai-response-compact, openai-alpha-search.

### How do I switch an existing project to gpt-5.6-terra?

Keep the MoleAPI API address and key, replace the model parameter, and check protocol-specific parameters.

### Where do the gpt-5.6-terra details come from?

Capabilities and limitations are checked against OpenAI and the other cited pages; pricing and protocols come from the MoleAPI console.