OpenAI: GPT-5.6 Terra
Analysis Summary
OpenAI's GPT-5.6 Terra is a capable coding and tool-oriented model, with strong coding results and a substantial agentic result. It supports tool use, function calling, and vision, and its 1.05M-token context can accommodate large documents or codebases. This combination gives it a practical profile for workflows requiring both software work and long-context analysis.
Businesses can consider Terra for coding agents, complex document review, and multimodal tasks where accuracy and context capacity matter. Its listed input price is $2 per million tokens and output price is $12 per million tokens, so it is better reserved for higher-value jobs than routine bulk generation. The benchmark evidence supports a production pilot, with particular attention to cost per completed task and whether its agentic performance is reliable on the team's own tools.
Assessed September 23, 2026
Editorial notes
GPT-5.6 Terra pairs strong coding and agentic results with a 1M-token context, vision, and tool calling; its listed premium pricing suits demanding work more than high-volume traffic.
The DFO score ranks models on the Artificial Analysis Intelligence Index and is refreshed as new models launch. The write-up and verdict are our own. Feedback?
DFO Verdict
GPT-5.6 Terra pairs strong coding and agentic results with a 1M-token context, vision, and tool calling; its listed premium pricing suits demanding work more than high-volume traffic.
Benchmarks
Artificial Analysis data refreshed Sep 24, 2026. Arena ratings from the Sep 13, 2026 text leaderboard, with style control.
How OpenAI: GPT-5.6 Terra compares
OpenAI: GPT-5.6 Terra ranks #15 of 428 AI models we track for overall intelligence, #6 of 198 for coding, #18 of 181 for agentic tasks. Its 1.1M-token context window is larger than 98% of the models we list. At $2.00 per million input tokens it is cheaper than 16% of comparable models.
Dark bar = input · light bar = output, scaled to the priciest peer.
1M tokens ≈ 8 full-length novels or ~2,500 pages of business documents in a single request.
Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $2.00 | $0.002000 |
| Output | $12.00 | $0.012000 |
What would OpenAI: GPT-5.6 Terra cost your business?
Pick the job that looks most like yours, then fine-tune with the sliders. Estimates update live.
A website chatbot handling around 100 customer conversations a day, a few short messages each.
Full calculator with 683 models → Price Calculator
These numbers get smaller with the right architecture.
We route routine calls to cheap models and save OpenAI: GPT-5.6 Terra for the hard ones. Most clients cut their estimate by 60-80%.
Talk to our teamAbout OpenAI: GPT-5.6 Terra
GPT-5.6 Terra is a balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It is suited for everyday coding, reasoning, and agentic..
Embed this ranking
Frequently asked questions about OpenAI: GPT-5.6 Terra
How much does OpenAI: GPT-5.6 Terra cost?
OpenAI: GPT-5.6 Terra costs $2.00 per million input tokens and $12.00 per million output tokens.
What is the context window of OpenAI: GPT-5.6 Terra?
OpenAI: GPT-5.6 Terra has a context window of 1,050,000 tokens (1.1M).
Is OpenAI: GPT-5.6 Terra good for coding?
On our coding benchmark index, OpenAI: GPT-5.6 Terra ranks #6 of 198 models, placing it in the top quartile of the field for code generation and debugging.
What can OpenAI: GPT-5.6 Terra do?
OpenAI: GPT-5.6 Terra supports image/vision input, tool use, and function calling.
Who created OpenAI: GPT-5.6 Terra?
OpenAI: GPT-5.6 Terra is developed by OpenAI and was released on July 9, 2026.