GPT-5.6 Terra (Xhigh)
By OpenAI · released 2026-07-09 (3 months) · snapshot 2026-10-24
- Intelligence index
- 38.00
- Cost to run the AA index
- $1187
- Price per 1M tokens (in / out)
- $2.00 / $12.0
- End-to-end time
- 15.0s
Is GPT-5.6 Terra (Xhigh) on the Pareto frontier, and what beats it?
Off the frontier
No. GPT-6.1 Sol (Max) is at least as smart for the same money or less.
Next step up: Claude Opus 5.5 (High, Default Fallback), smarter but dearer.
| # | Model | Creator | Intelligence | Total cost | E2E total | Open | Released | Frontier |
|---|---|---|---|---|---|---|---|---|
| 1 | GPT-5.6 Terra (Xhigh) | OpenAI | 38.00 | $1187 | 15.0s | 2026-07-09 | ||
| 2 | GPT-6.1 Sol (Max) | OpenAI | 51.80 | $1082 | 220.5s | 2026-09-29 | Frontier | |
| 3 | Claude Opus 5.5 (High, Default Fallback) | Anthropic | 53.60 | $2172 | 33.8s | 2026-09-22 | Frontier |
Open in the picker Daily check URL: 200 on the frontier, 409 once beaten
GPT-5.6 Terra (Xhigh) today
Intelligence: Artificial Analysis Intelligence Index. Cost: total cost to run that benchmark, so reasoning tokens count. API id: gpt-5-6-terra-xhigh.
Compare head to head
Suggested: what beats it, its effort levels, and frontier models near its price.
- GPT-5.6 Terra (Xhigh) vs GPT-6.1 Sol (Max)
- GPT-5.6 Terra (Xhigh) vs Claude Opus 5.5 (High, Default Fallback)
- GPT-5.6 Terra (Xhigh) vs GPT-5.6 Terra (Non-reasoning)
- GPT-5.6 Terra (Xhigh) vs GPT-5.6 Terra (Low)
- GPT-5.6 Terra (Xhigh) vs GPT-5.6 Terra (Medium)
- GPT-5.6 Terra (Xhigh) vs GPT-5.6 Terra (High)
- GPT-5.6 Terra (Xhigh) vs GPT-5.6 Terra (Max)
- GPT-5.6 Terra (Xhigh) vs GPT-6.1 Sol (High)
- GPT-5.6 Terra (Xhigh) vs GPT-6.1 Sol (Xhigh)
- GPT-5.6 Terra (Xhigh) vs Kimi K3.1 Pro
What the GPT-5.6 Terra release did to the frontier on 2026-07-09
3 of 6 effort levels reached the frontier at launch (GPT-5.6 Terra (High), GPT-5.6 Terra (Xhigh), GPT-5.6 Terra (Max)). Impact 2.39, #15 of 46 releases this past year.
Should you use GPT-5.6 Terra (Xhigh)?
Should you use GPT-5.6 Terra (Xhigh)?
Only when it fits your setup: GPT-6.1 Sol (Max) is at least as smart for the same money or less, so GPT-5.6 Terra (Xhigh) is off the value frontier today.
What is better and cheaper than GPT-5.6 Terra (Xhigh)?
GPT-6.1 Sol (Max) — at least as smart for the same money or less.
How much does GPT-5.6 Terra (Xhigh) cost?
$2.00/$12 in/out per 1M tokens, and $1187 to run the full Artificial Analysis Intelligence Index, the honest all-in number for reasoning models.
Is GPT-5.6 Terra (Xhigh) on the Pareto frontier?
No: GPT-6.1 Sol (Max) beats it on intelligence, cost, or both.
Frontier membership by axis pair
Other axis pairs where GPT-5.6 Terra (Xhigh) is Pareto-optimal.
| Y axis | X axis | On the frontier |
|---|---|---|
| AA intelligence index | AA total cost to run (USD) | |
| AA intelligence index | End-to-end total seconds | |
| AA intelligence index | Output speed tokens/sec |
Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/models/gpt-5-6-terra-xhigh · Markdown: /api/v1/models/gpt-5-6-terra-xhigh?format=md · llms.txt · agent skill