GPT-5.6 Terra Pro
Current version: 5.6 updated
Terra with pro reasoning mode: higher quality on complex tasks.
What's new in GPT-5.6 Terra Pro 5.6
- 1.05M token context
- Terra with reasoning.mode pro for complex tasks
- Higher reasoning quality at the same price
- 2.5 USD input, 15 USD output per million tokens
What it's the best tool for
- Pro mode: multi-pass reasoning before the final answer
- 1.05M-token context with up to 128K output
- Base Terra scores 77.4 on the Coding Agent Index, tied with Claude Fable 5
- Half the list price of the Sol flagship
- Vision, tool use and function calling built in
- Fresh knowledge cutoff: February 2026
When to reach for something else
- Multi-pass reasoning adds noticeable response latency
- Burns more tokens than base Terra at the same list price
- Trails the Sol flagship on the hardest reasoning tasks
- No built-in web search; knowledge stops at February 2026
- OpenAI content filters on sensitive topics
How GPT-5.6 Terra Pro responds
GPT-5.6 Terra Pro
Four scenarios where it pays for itself
More about GPT-5.6 Terra Pro
GPT-5.6 Terra Pro Online — OpenAI Pro Reasoning on NetRoom
GPT-5.6 Terra Pro is the same Terra from the GPT-5.6 family (released July 9, 2026) served with reasoning.mode set to pro: the model runs multiple reasoning passes before returning a single final answer. The result is noticeably higher quality on complex work — architecture, migrations, math, long chains of logic. Access it on NetRoom right in the browser, no VPN required.
Terra Pro vs base Terra
The foundation is identical: a 1.05M-token context, up to 128K output, vision, tool use and function calling, knowledge through February 2026. Base Terra already scores 77.4 on the Artificial Analysis Coding Agent Index — effectively tied with Claude Fable 5. Pro mode layers multi-pass reasoning on top: where standard Terra may cut a corner, Pro keeps working the problem to the end.
The list price matches base Terra and sits at half of the Sol flagship. Keep in mind: pro mode burns more reasoning tokens, so the real cost per answer is higher — a deliberate trade of tokens for quality, not a hidden markup.
When to pick Terra Pro
Complex code and refactors where mistakes are expensive. Research across hundred-page document stacks. Architecture decisions and migration plans with risk assessment. Math and hard logic. For quick chat and routine tasks, take standard Terra or Luna — faster and cheaper.
How to start
Sign up on NetRoom, top up your balance, pick GPT-5.6 Terra Pro from the catalog. One balance covers every model, so you can run the same prompt through Pro and base Terra and compare what you pay for. Send your prompt and give the model time to think: latency is above average, and the result is worth it.
What changed GPT-5.6 Terra Pro
- + Added text model GPT-5.6 Terra Pro (OpenAI).
Version history of GPT-5.6 Terra Pro
| Version | Date | What changed |
|---|---|---|
| 5.6 current |
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