# GPT-5.6 Terra API Pricing

As of October 10, 2026, GPT-5.6 Terra costs $2.00 per 1M input tokens and $12.00 per 1M output tokens on OpenAI, with cache reads at $0.20 and cache writes at $2.50 per 1M tokens. Across 9 providers on LiteLLM, the input price ranges from $2.00 to $2.50. It has a 922,000-token context window and returns up to 128,000 tokens per response.

- Page: https://models.litellm.ai/models/gpt-5.6-terra
- Lab: OpenAI
- LiteLLM model name: `gpt-5.6-terra`
- Context window: 922,000 tokens
- Max output: 128,000 tokens
- Added to LiteLLM: July 9, 2026
- Prices updated: October 10, 2026

## Pricing by provider

Token prices in USD per 1M tokens.

| Provider | Model name | Input | Output | Cache read | Per image | Per second | Context |
|---|---|---|---|---|---|---|---|
| OpenAI | `gpt-5.6-terra` | $2.00 | $12.00 | $0.20 | – | – | 922K |
| AIHubMix | `aihubmix/gpt-5.6-terra` | $2.00 | $12.00 | $0.20 | – | – | 1M |
| Amazon Bedrock Mantle | `bedrock_mantle/openai.gpt-5.6-terra` | $2.20 | $13.20 | $0.22 | – | – | 1M |
| Azure OpenAI | `azure/gpt-5.6-terra` | $2.00 | $12.00 | $0.20 | – | – | 922K |
| Azure OpenAI (snapshot 2026-07-09) | `azure/gpt-5.6-terra-2026-07-09` | $2.00 | $12.00 | $0.20 | – | – | 922K |
| ChatGPT Subscription | `chatgpt/gpt-5.6-terra` | – | – | – | – | – | 1M |
| Databricks | `databricks/databricks-gpt-5-6-terra` | $2.50 | $15.00 | $0.25 | – | – | 922K |
| GitHub Copilot | `github_copilot/gpt-5.6-terra` | – | – | – | – | – | 272K |
| Perplexity | `perplexity/openai/gpt-5.6-terra` | $2.00 | $12.00 | $0.20 | – | – | – |
| Amazon Bedrock (Global cross-region) | `global.openai.gpt-5.6-terra` | $2.00 | $12.00 | $0.20 | – | – | 1M |
| Amazon Bedrock (US cross-region) | `us.openai.gpt-5.6-terra` | $2.20 | $13.20 | $0.22 | – | – | 1M |
| Amazon Bedrock Mantle (us-gov-west-1) | `bedrock_mantle/us-gov-west-1/openai.gpt-5.6-terra` | $2.70 | $16.20 | $0.27 | – | – | 1M |
| Azure OpenAI (eu) | `azure/eu/gpt-5.6-terra` | $2.20 | $13.20 | $0.22 | – | – | 922K |
| Azure OpenAI (us) | `azure/us/gpt-5.6-terra` | $2.20 | $13.20 | $0.22 | – | – | 922K |

## Cost examples

1,000 requests with 2,000 input and 500 output tokens each:

- OpenAI: $10.00
- AIHubMix: $10.00
- Azure OpenAI: $10.00
- Perplexity: $10.00
- OpenAI batch: $5.00

100 long-document requests with 100,000 input and 2,000 output tokens each:

- OpenAI: $22.40
- AIHubMix: $22.40
- Azure OpenAI: $22.40
- Perplexity: $22.40

## Features

Supported: Function calling, Parallel tool calls, Structured output, Image input, PDF input, Reasoning, Prompt caching, Web search.

## Use it with LiteLLM

```python
from litellm import completion

response = completion(
    model="gpt-5.6-terra",
    messages=[{"role": "user", "content": "Hello!"}],
)
```

## FAQ

### How much does GPT-5.6 Terra cost?

GPT-5.6 Terra costs $2.00 per 1M input tokens and $12.00 per 1M output tokens on OpenAI, with cache reads at $0.20 and cache writes at $2.50 per 1M tokens. Batch requests cost $1.00 per 1M input tokens and $6.00 per 1M output tokens. Above 272K input tokens, input costs $4.00 and output costs $18.00 per 1M tokens. Across 9 providers on LiteLLM, the input price ranges from $2.00 to $2.50.

### What is the context window of GPT-5.6 Terra?

GPT-5.6 Terra has a 922,000-token context window and returns up to 128,000 tokens per response.

### Which providers offer GPT-5.6 Terra?

GPT-5.6 Terra is available from 9 providers through LiteLLM: OpenAI, AIHubMix, Amazon Bedrock Mantle, Azure OpenAI, ChatGPT Subscription, Databricks, GitHub Copilot, Perplexity and Amazon Bedrock. The lowest price is on OpenAI.

### How do I call GPT-5.6 Terra with an OpenAI-compatible API?

Use the LiteLLM Python SDK with model="gpt-5.6-terra", or add the model to the LiteLLM proxy's config.yaml and send requests to /v1/chat/completions from any OpenAI client. LiteLLM tracks the cost of every request at the prices on this page.

### What features does GPT-5.6 Terra support?

GPT-5.6 Terra supports function calling, parallel tool calls, structured output, image input, PDF input, reasoning, prompt caching and web search.

### When did LiteLLM add GPT-5.6 Terra?

GPT-5.6 Terra was added to LiteLLM's model price file on July 9, 2026.

Source: LiteLLM model price file, https://github.com/BerriAI/litellm/blob/main/model_prices_and_context_window.json