GPT-5.6 Terra

SyncDev model directory · Profile updated Oct 13, 2026

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GPT-5.6 Terra from OpenAI: Balanced GPT-5.6 model for capable, cost-efficient everyday work.

Key specifications

Specification score
80.8
Context window
1.05M
Max output
128K
Input / 1M tokens
$2.00
Output / 1M tokens
$12.00
License
Proprietary

The specification score summarizes recorded features and limits. It is not a benchmark result.

Inputs and outputs

Recorded modality support shows what this model can accept and produce. An undocumented modality is shown as unknown rather than assumed to be unsupported.

Accepts

  • Text input
  • Image input
  • PDF input

Produces

  • Text output

Capabilities

ReasoningFunction callingVisionJSON mode

What is GPT-5.6 Terra?

What GPT-5.6 Terra is for

Balanced GPT-5.6 model for capable, cost-efficient everyday work. The registry places it in the gpt-terra family with a release date of 2026-07-09. This profile describes its documented interface and how to evaluate it for the intended task.

Inputs and request limits

The recorded inputs are text, image and pdf, with text output. The registry lists a 1,050,000-token context window and up to 128,000 output tokens. It also declares reasoning, function calling and structured output. These are specifications, not a measured quality or speed ranking. A host can impose its own request limits and support a different subset of features.

Deployment and cost

GPT-5.6 Terra is recorded as a hosted model without downloadable weights. Confirm the current model ID and access conditions on the chosen API. A registry listing alone does not establish that an account or region has access.

No independently checked token rate is added from a hosting alias. Use the route’s current price and billing unit when comparing cost, including output, reasoning, cache behavior and retries where applicable.

What to test

Test photographs, screenshots and documents with the detail your application needs to read. Include small text, crowded layouts and questions whose answer is absent. Check whether the answer is supported by the image instead of accepting a plausible description.

Evidence and related models

This is a registry-sourced profile. A model-specific publisher document has not yet been confirmed; access and specifications should be checked before an integration decision. SyncDev has not independently benchmarked GPT-5.6 Terra.

Browse OpenAI models, explore related tasks, or compare two models using the same workload.

How to evaluate GPT-5.6 Terra

Compare the model on the work you need to complete.

Tasks and inputs

GPT-5.6 Terra is listed for Image-text-to-text, Text generation. It accepts text, image, pdf and produces text. Use the publisher’s input format and preprocessing for your chosen deployment.

Capacity and cost

Documented limits: 1.05M context and 128K maximum output. The listed route charges $2.00 input and $12.00 output per million tokens. Measure a completed task using the prompts, documents and tools your application will use. Include reasoning and retries in the result.

Choosing a deployment

Use the model identifier and account requirements for the selected API route. Confirm its request limits and output format with one complete task before connecting a larger workflow.

Frequently asked questions

GPT-5.6 Terra from OpenAI: Balanced GPT-5.6 model for capable, cost-efficient everyday work.

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