GPT-5.6 Terra
A good performance / EU-hosting balance for a European company.
Overview
Pitched by OpenAI at coding and agentic workflows, GPT-5.6 Terra ships with a one-million-token context window and pricing advertised as cost-efficient ($2 / $12 per million tokens). No published benchmarks accompany the release, so real-world performance still needs independent verification. It's a proprietary, US-hosted model with no on-premise option — a point European CISOs handling sensitive data should weigh carefully.
Skill profile
Not disclosed
Three independent measures
What people prefer, what the model can do, what the market uses. Each source has its biases and none is enough on its own: we show them side by side, never blended.
Strengths
- World-class on Arena
- Very long context
Who is it for
- you build with a coding agent
- your data must stay in the EU
Ideal use cases
- Multi-file coding assistants
- Autonomous agent orchestration
- Large codebase analysis
- Technical workflow automation
Access & availability
Key specifications
What it costs per month
Estimate from sourced API prices and a hardware tier for self-hosting. Assumptions are editable.
Assumptions: 36-month amortisation, 0.25 €/kWh, 22 days/month, 1 $ = 0.92 €. Excludes labour, software licences, redundancy.
nAIvigate Trust Index
What the vendor offers and documents for professional use in Europe. An undocumented criterion counts as zero and stays visible: the score rises when the vendor publishes, not when we assume.
20/20 criteria documented · 100 %
See the criteria▾
Trust Index badge
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[](https://naivigate.com/en/model/gpt-5-6-terra)Data & compliance
What we know, line by line, with source and date. These lines feed the Data and Enterprise families of the Trust Index above. GDPR compliance depends on your processing, not on the model alone.
| EU data residency | On request |
| Data processing agreement (DPA) | Yes |
| Transfer outside the EU | Depends on plan |
| Training on your data | No |
| Configurable retention | Yes |
| Zero Data Retention | On request |
| Self-hostable | No |
| Declared hosting | US/EU |
Quality of this card’s data
This score measures the quality of the data on this card: price, context, Elo, licence, documented, sourced and fresh. It measures neither the model nor its compliance: for that, see the Trust Index above.
5/6 documented · 3/6 primary sources
Advanced data · for expertsArchitecture, modalities, detailed cost, full benchmarks▾
| Arena Elo | 1466 |
| MMLU | — |
| GPQA | — |
| HumanEval | — |
| SWE-Bench | — |
| MATH | — |