GPT-5.6 Terra
Summary
GPT-5.6 Terra is a proprietary language model from OpenAI, released on 9 Jul 2026. It accepts text, images and PDFs and generates text, with a 1.1M-token context window and up to 128K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $2 per million input tokens and $12 per million output tokens (OpenAI API), across 7 providers we track.
Balanced GPT-5.6 model for capable, cost-efficient everyday work
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | OpenAI |
|---|---|
| Release date | 9 Jul 2026 [models.dev] |
| Status | Generally available [models.dev] |
| Weights | Proprietary (API only) [models.dev] |
| Context window | 1.1M (1,050,000 tokens) [models.dev] |
| Max output | 128K tokens [models.dev] |
| Knowledge cutoff | 16 Feb 2026 [models.dev] |
| Input | Text, images and PDFs [models.dev] |
| Output | Text [models.dev] |
| Reasoning mode | Yes [models.dev] |
| Tool calling | Yes [models.dev] |
| Structured output | Yes [models.dev] |
GPT-5.6 Terra API pricing by provider
USD per million tokens. Sorted by input price.
| Provider | Input | Output | Cached input | Context | Source |
|---|---|---|---|---|---|
| OpenAI API gpt-5.6-terra | $2 | $12 | $0.20 | 1.1M | models.dev, 4 Oct 2026 |
| Amazon Bedrock global.openai.gpt-5.6-terra | $2 | $12 | $0.20 | 1.1M | models.dev, 4 Oct 2026 |
| Azure AI Foundry gpt-5.6-terra | $2 | $12 | $0.20 | 1.1M | models.dev, 4 Oct 2026 |
| OpenRouter openai/gpt-5.6-terra-pro | $2 | $12 | $0.20 | 1.1M | OpenRouter, 4 Oct 2026 |
| Vercel AI Gateway openai/gpt-5.6-terra | $2 | $12 | $0.20 | 1.1M | models.dev, 4 Oct 2026 |
| OpenRouter openai/gpt-5.6-terra | $2 | $12 | $0.20 | 1.1M | OpenRouter, 4 Oct 2026 |
| Amazon Bedrock openai.gpt-5.6-terra | $2.20 | $13.20 | $0.22 | 1.1M | models.dev, 4 Oct 2026 |
| Amazon Bedrock us.openai.gpt-5.6-terra | $2.20 | $13.20 | $0.22 | 1.1M | models.dev, 4 Oct 2026 |
| Amazon Bedrock in.openai.gpt-5.6-terra | $2.20 | $13.20 | $0.22 | 1.1M | models.dev, 4 Oct 2026 |
| Databricks databricks-gpt-5-6-terra | $2.50 | $15 | $0.25 | 1.1M | models.dev, 4 Oct 2026 |
| Vercel AI Gateway openai/gpt-5.6-terra-fast | $4 | $24 | $0.40 | 1.1M | models.dev, 4 Oct 2026 |
| Snowflake Cortex openai-gpt-5.6-terra | – | – | – | 1.1M | models.dev, 4 Oct 2026 |
Frequently asked questions
What is the context window of GPT-5.6 Terra?
GPT-5.6 Terra has a context window of 1,050,000 tokens (1.1M) and can generate up to 128,000 tokens in a single response, according to models.dev.
How much does the GPT-5.6 Terra API cost?
Through OpenAI API, GPT-5.6 Terra costs $2 per million input tokens and $12 per million output tokens. Prices last verified 4 Oct 2026.
Is GPT-5.6 Terra open source?
No. GPT-5.6 Terra is a proprietary model; OpenAI has not released its weights. It is available through APIs including OpenAI API, Amazon Bedrock, Azure AI Foundry, OpenRouter.
When was GPT-5.6 Terra released?
OpenAI released GPT-5.6 Terra on 9 Jul 2026, according to models.dev.
Which providers offer GPT-5.6 Terra?
We track GPT-5.6 Terra on 7 providers: OpenAI API, Amazon Bedrock, Azure AI Foundry, OpenRouter, Vercel AI Gateway, Databricks, Snowflake Cortex.
Change history
No changes detected since we started tracking this model. We re-check every source daily.
Sources
- https://github.com/sst/models.dev/blob/dev/providers/openai/models/gpt-5.6-terra.toml
- https://github.com/sst/models.dev/blob/dev/providers/amazon-bedrock/models/global.openai.gpt-5.6-terra.toml
- https://github.com/sst/models.dev/blob/dev/providers/azure/models/gpt-5.6-terra.toml
- https://openrouter.ai/openai/gpt-5.6-terra-pro
- https://github.com/sst/models.dev/blob/dev/providers/vercel/models/openai/gpt-5.6-terra.toml
- https://openrouter.ai/openai/gpt-5.6-terra
- https://github.com/sst/models.dev/blob/dev/providers/amazon-bedrock/models/openai.gpt-5.6-terra.toml
- https://github.com/sst/models.dev/blob/dev/providers/amazon-bedrock/models/us.openai.gpt-5.6-terra.toml
- https://github.com/sst/models.dev/blob/dev/providers/amazon-bedrock/models/in.openai.gpt-5.6-terra.toml
- https://github.com/sst/models.dev/blob/dev/providers/databricks/models/databricks-gpt-5-6-terra.toml
- https://github.com/sst/models.dev/blob/dev/providers/vercel/models/openai/gpt-5.6-terra-fast.toml
- https://github.com/sst/models.dev/blob/dev/providers/snowflake-cortex/models/openai-gpt-5.6-terra.toml