🇺🇸 United States—Released July 2026
GPT-5.6 Terra
OpenAI
Verdict
A versatile model, balanced across most use cases.
Overview
GPT-5.6 Terra sits in the middle of the GPT-5.6 family, between Sol and Luna. OpenAI describes it as corresponding to the "mini" tier of earlier GPT-5 generations. 1.05M-token context, 128K max output, $2.50/$15 per million tokens, February 16 2026 knowledge cutoff. Aimed at coding, production knowledge work and agent orchestration where the frontier tier is not required.
Skill profile
Not disclosed
Strengths
- Very long context
Limitations
- No native GDPR guarantee
Who is it for
A good fit if…
Skip it if…
- you handle sensitive EU data
Access & availability
Paid API per token
Key specifications
Context
1M
Input price
$2.50 $/M
Output price
$15.00 $/M
Speed
—
Price not auditedBenchmarks not audited
Estimate your monthly cost
Per-token API pricing$181/ month with GPT-5.6 Terra
For the same usage
- GPT-5.6 Luna$73-60%
- Claude Sonnet 5$196+8%
- Claude Opus 4.6$327+80%
Indicative estimate based on standard API rates (excluding caching, batch and volume discounts). Always check the official pricing before committing.
Privacy
Not GDPR-compliant
Advanced data · for expertsArchitecture, modalities, detailed cost, full benchmarks▾
Advanced data · for experts
Architecture, modalities, detailed cost, full benchmarks
Architecture
—
Size
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Cutoff date
—
Inputs
—
Outputs
—
License
commercial
Hosting
—
Hallucination score
—
Estimated cost (API)
Typical exchange (~3k in / 1k out)
≈ $0.0225
1M in + 1M out
≈ $17.50
All benchmarks
| Arena Elo | — |
| MMLU | — |
| GPQA | — |
| HumanEval | — |
| SWE-Bench | — |
| MATH | — |