GPT-5.6 Terra
GPT-5.6 Terra is a balanced AI model developed by OpenAI that sits between their flagship and cost-efficient tiers. It is designed to handle complex reasoning, coding tasks, and agentic workflows while supporting both text and image inputs.
GPT-5.6 Terra specs and pricing
- Provider: OpenAI
- Released: July 9, 2026
- Context window: 1.1M tokens
- Max output: 128K tokens
- Input: files, images, text
- Output: text
- Price: $2.00 input / $12 output per 1M tokens
- Reasoning: yes
- Tool calling: yes
What GPT-5.6 Terra is good at
- Complex programming and code debugging
- Reasoning-heavy analytical tasks
- Processing large documents or image-based data
To-dos to try with GPT-5.6 Terra
- Analyze this 500-page technical manual and summarize the troubleshooting steps for the hardware.
- Review this codebase to identify potential security vulnerabilities and suggest refactored code.
- Examine these architectural diagrams and generate a list of materials required for construction.
FAQ
- What is the primary purpose of the GPT-5.6 Terra model? It is designed for everyday coding, complex reasoning, and agentic tasks as a balanced option within OpenAI's GPT-5.6 series.
- Can this model process visual information? Yes, the model accepts both image and file inputs in addition to standard text.
- How much does GPT-5.6 Terra cost? GPT-5.6 Terra costs $2.00 per million input tokens and $12 per million output tokens through OpenRouter. In todo.is a typical agent step costs about 7.28 credits ($1 = 100 credits).
- What is the context window of GPT-5.6 Terra? GPT-5.6 Terra can read up to 1.1M tokens at once and write up to 128K tokens in one reply.
- Can I use GPT-5.6 Terra without coding? Yes. In todo.is you pick GPT-5.6 Terra as your agent's model and write to-dos in plain words, on the web, the Android app, WhatsApp or Telegram. No API key needed: credits are included, or you can bring your own key.
JavaScript is required to use the todo.is app.