GPT-5.5 (High)
By OpenAI · released 2026-04-23 (6 months) · snapshot 2026-10-24
- Intelligence index
- 37.00
- Cost to run the AA index
- $3411
- Price per 1M tokens (in / out)
- $5.00 / $30.0
- End-to-end time
- 19.8s
Is GPT-5.5 (High) on the Pareto frontier, and what beats it?
Off the frontier
No. Kimi K3.1 Pro is at least as smart for the same money or less.
Next step up: Claude Opus 5.5 (Xhigh, Default Fallback), smarter but dearer.
| # | Model | Creator | Intelligence | Total cost | E2E total | Open | Released | Frontier |
|---|---|---|---|---|---|---|---|---|
| 1 | GPT-5.5 (High) | OpenAI | 37.00 | $3411 | 19.8s | 2026-04-23 | ||
| 2 | Kimi K3.1 Pro | Kimi | 55.10 | $3117 | 42.6s | 2026-10-23 | Frontier | |
| 3 | Claude Opus 5.5 (Xhigh, Default Fallback) | Anthropic | 56.00 | $4057 | 123.1s | 2026-09-22 | Frontier |
Open in the picker Daily check URL: 200 on the frontier, 409 once beaten
GPT-5.5 (High) today
3 of 5 effort levels plotted. The remaining levels lack intelligence or benchmark cost data.
Intelligence: Artificial Analysis Intelligence Index. Cost: total cost to run that benchmark, so reasoning tokens count. API id: gpt-5-5-high.
Compare head to head
Suggested: what beats it, its effort levels, and frontier models near its price.
- GPT-5.5 (High) vs Kimi K3.1 Pro
- GPT-5.5 (High) vs Claude Opus 5.5 (Xhigh, Default Fallback)
- GPT-5.5 (High) vs GPT-5.5 (Medium)
- GPT-5.5 (High) vs GPT-5.5 (Xhigh)
- GPT-5.5 (High) vs GPT-5.5 (Low)
- GPT-5.5 (High) vs GPT-5.5 (Non-reasoning)
- GPT-5.5 (High) vs Claude Opus 5.5 (High, Default Fallback)
- GPT-5.5 (High) vs Claude Opus 5.5 (Max, Default Fallback)
What the GPT-5.5 release did to the frontier on 2026-04-23
3 of 5 effort levels reached the frontier at launch (GPT-5.5 (Medium), GPT-5.5 (High), GPT-5.5 (Xhigh)). Impact 7.04, #3 of 46 releases this past year.
Should you use GPT-5.5 (High)?
Should you use GPT-5.5 (High)?
Only when it fits your setup: Kimi K3.1 Pro is at least as smart for the same money or less, so GPT-5.5 (High) is off the value frontier today.
What is better and cheaper than GPT-5.5 (High)?
Kimi K3.1 Pro — at least as smart for the same money or less.
How much does GPT-5.5 (High) cost?
$5.00/$30 in/out per 1M tokens, and $3411 to run the full Artificial Analysis Intelligence Index, the honest all-in number for reasoning models.
Is GPT-5.5 (High) on the Pareto frontier?
No: Kimi K3.1 Pro beats it on intelligence, cost, or both.
Frontier membership by axis pair
Other axis pairs where GPT-5.5 (High) 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-5-5-high · Markdown: /api/v1/models/gpt-5-5-high?format=md · llms.txt · agent skill