GPT-5.6 Terra
OpenAI's flagship: the strongest general intelligence and tool use
free access available
- Context
- 400,000 tokens
- Type
- Multimodal, with reasoning
- Input
- Text, images
- Developer
- OpenAI
- Strengths
- Versatility, tools
- Access
- ChatPlus PRO
GPT-5.6 Terra is the top model in OpenAI's GPT line. Best-in-class versatility: it writes text, reasons over complex tasks, works with code and calls tools equally confidently. It understands text and images, holds a large context and follows instructions well.
Terra is the model you keep "for everything." You don't have to guess in advance whether it can handle a task: a draft email, a spreadsheet breakdown, code, a long piece of writing — it takes on anything and almost never lets you down.
Tools deserve a special mention. Terra doesn't just answer in text — it decides on its own when to search the web, run code or assemble a document, and does so mid-conversation. So you can hand it not a "Q&A" but a whole multi-step task.
Its writing is lively, without bureaucratic stiffness or a machine-translated feel. Terra is a comfortable place to write things that will go out to people, not just sit in your notes.
What it's good at
General intelligence
One model for any task — from writing to data analysis and code.
Reasoning
A thinking mode for complex multi-step tasks and logic.
Tools and agents
Calls search, code and other tools on its own, carrying a task to a result.
Multimodality
Understands images alongside text in a single request.
GPT-5.6 Terra and every other model — one plan, one window.
Where it's strongest
GPT next to the others
How GPT-5.6 Terra and the flagships of other labs look side by side. They're all in one ChatPlus subscription.
| Claude | DeepSeek | GPT | Gemini | Grok | GLM | Kimi | Qwen | Muse | GLM 5.3 Flash | |
|---|---|---|---|---|---|---|---|---|---|---|
| Developer | Anthropic | DeepSeek | OpenAI | xAI | Z.ai | Moonshot | Alibaba | Meta | Z.ai | |
| Model | Sonnet 4.6 | DeepSeek V4.1 Reasoner | GPT-5.6 Terra | Gemini 3 Pro | Grok 4 | GLM 5 | Kimi K3 | Qwen 3.8 Max | Muse Spark 1.3 | GLM 5.3 Flash |
| Context | 200K | 128K | 400K | 1M | 256K | 1M | 256K | 256K | 1M | 1M |
| Understands images | — | — | ||||||||
| Live web data | — | — | — | — | — | — | — | |||
| Open source | — | — | — | — | — | |||||
| Key strength | Text and code | Reasoning | Versatility | Multimodality | Timeliness | Code and agents | Long context | Complex tasks | Agents and code | Code and agents |
| On ChatPlus |