GPT 5.6 Terra
GPT 5.6 Terra is a text generation model from OpenAI with a 1,050,000-token context window and image input support.
OpenAILarge-context text generation with image understanding
GPT 5.6 Terra is a large language model developed by OpenAI, released in July 2026. It supports a context window of 1,050,000 tokens and can generate responses up to 128,000 tokens in length, making it suited for tasks that require processing or producing large volumes of text in a single session. The model accepts image inputs alongside text, enabling multimodal workflows without requiring a separate vision model.
GPT 5.6 Terra includes a configurable reasoning effort setting, allowing users to adjust how much computational effort the model applies to a given prompt. This makes it adaptable across use cases ranging from quick drafting tasks to more deliberate, multi-step reasoning. It is well suited for document analysis, long-form content generation, and applications that involve large codebases or extended conversation histories.
What GPT 5.6 Terra supports
Long Context Window
Processes up to 1,050,000 tokens in a single request, enabling analysis of large documents, codebases, or extended conversation histories without truncation.
Image Input Support
Accepts image inputs alongside text prompts, allowing the model to analyze and respond to visual content within a single multimodal request.
Configurable Reasoning Effort
Exposes a reasoning effort selector that lets users tune how much deliberation the model applies, balancing response depth against latency.
Large Response Output
Supports a maximum response size of 128,000 tokens, suitable for generating long-form documents, detailed reports, or extensive code files in one pass.
Text Generation
Generates coherent, contextually grounded text across a wide range of formats including prose, structured data, and code.
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Get Started FreeCommon questions about GPT 5.6 Terra
What is the context window size for GPT 5.6 Terra?
GPT 5.6 Terra has a context window of 1,050,000 tokens, meaning it can process up to that many tokens of combined input and conversation history in a single request.
What is the maximum response length?
The model supports a maximum response size of 128,000 tokens per generation.
Does GPT 5.6 Terra support image inputs?
Yes, GPT 5.6 Terra accepts image inputs alongside text, enabling multimodal prompts within a single request.
What does the Reasoning Effort setting do?
The Reasoning Effort input allows you to configure how much computational effort the model applies when generating a response. Adjusting this setting can affect the depth of reasoning and the time taken to produce an answer.
When was GPT 5.6 Terra released?
GPT 5.6 Terra was released in July 2026 and was added to MindStudio on August 9, 2026.
Parameters & options
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