GPT-5.6 Sol (max)
By OpenAI · released 2026-07-09 (2 months) · snapshot 2026-09-09
- Intelligence index
- 47.10
- Cost to run the AA index
- $3465
- Price per 1M tokens (in / out)
- $4.00 / $20.0
- End-to-end time
- 145.6s
Is GPT-5.6 Sol (max) on the Pareto frontier, and what beats it?
Off the frontier
No. GPT-6 Astra (high) is at least as smart for the same money or less.
Next step up: GPT-6 Astra (xhigh), smarter but dearer.
| # | Model | Creator | Intelligence | Total cost | E2E total | Open | Released | Frontier |
|---|---|---|---|---|---|---|---|---|
| 1 | GPT-5.6 Sol (max) | OpenAI | 47.10 | $3465 | 145.6s | 2026-07-09 | ||
| 2 | GPT-6 Astra (high) | OpenAI | 51.00 | $2917 | 55.6s | 2026-09-03 | Frontier | |
| 3 | GPT-6 Astra (xhigh) | OpenAI | 52.50 | $3803 | 178.2s | 2026-09-03 | Frontier |
Open in the picker Daily check URL: 200 on the frontier, 409 once beaten
GPT-5.6 Sol (max) today
5 of 6 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-5-6-sol.
Compare head to head
Suggested: what beats it, its effort levels, and frontier models near its price.
- GPT-5.6 Sol (max) vs GPT-6 Astra (high)
- GPT-5.6 Sol (max) vs GPT-6 Astra (xhigh)
- GPT-5.6 Sol (max) vs GPT-5.6 Sol (low)
- GPT-5.6 Sol (max) vs GPT-5.6 Sol (medium)
- GPT-5.6 Sol (max) vs GPT-5.6 Sol (high)
- GPT-5.6 Sol (max) vs GPT-5.6 Sol (xhigh)
- GPT-5.6 Sol (max) vs GPT-5.6 Sol (Non-reasoning)
- GPT-5.6 Sol (max) vs GPT-6 Astra (low)
- GPT-5.6 Sol (max) vs Muse Spark 1.3 (max)
- GPT-5.6 Sol (max) vs GPT-6 Astra (medium)
- GPT-5.6 Sol (max) vs GPT-6 Astra (max)
- GPT-5.6 Sol (max) vs Claude Fable 5.1 (Adaptive Reasoning, Xhigh Effort, Default Fallback)
What the GPT-5.6 Sol release did to the frontier on 2026-07-09
5 of 6 effort levels reached the frontier at launch (GPT-5.6 Sol (low), GPT-5.6 Sol (medium), GPT-5.6 Sol (high), GPT-5.6 Sol (xhigh), GPT-5.6 Sol (max)). Impact 6.91, #2 of 28 releases this past year.
Should you use GPT-5.6 Sol (max)?
Should you use GPT-5.6 Sol (max)?
Only when it fits your setup: GPT-6 Astra (high) is at least as smart for the same money or less, so GPT-5.6 Sol (max) is off the value frontier today.
What is better and cheaper than GPT-5.6 Sol (max)?
GPT-6 Astra (high) — at least as smart for the same money or less.
How much does GPT-5.6 Sol (max) cost?
$4.00/$20 in/out per 1M tokens, and $3465 to run the full Artificial Analysis Intelligence Index, the honest all-in number for reasoning models.
Is GPT-5.6 Sol (max) on the Pareto frontier?
No: GPT-6 Astra (high) beats it on intelligence, cost, or both.
Frontier membership by axis pair
Other axis pairs where GPT-5.6 Sol (max) 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-sol · Markdown: /api/v1/models/gpt-5-6-sol?format=md · llms.txt · agent skill