Claude Opus 4.8 (Adaptive Reasoning, Max Effort)
By Anthropic · released 2026-05-28 (3 months) · snapshot 2026-09-09
- Intelligence index
- 42.00
- Cost to run the AA index
- $6874
- Price per 1M tokens (in / out)
- $5.00 / $25.0
- End-to-end time
- 25.4s
Is Claude Opus 4.8 (Adaptive Reasoning, Max Effort) on the Pareto frontier, and what beats it?
Off the frontier
No. GPT-6 Astra (max) is at least as smart for the same money or less.
Next step up: Claude Fable 5.1 (Adaptive Reasoning, Xhigh Effort, Default Fallback), smarter but dearer.
| # | Model | Creator | Intelligence | Total cost | E2E total | Open | Released | Frontier |
|---|---|---|---|---|---|---|---|---|
| 1 | Claude Opus 4.8 (Adaptive Reasoning, Max Effort) | Anthropic | 42.00 | $6874 | 25.4s | 2026-05-28 | ||
| 2 | GPT-6 Astra (max) | OpenAI | 52.80 | $5324 | 331.3s | 2026-09-03 | Frontier | |
| 3 | Claude Fable 5.1 (Adaptive Reasoning, Xhigh Effort, Default Fallback) | Anthropic | 53.20 | $9063 | 146.8s | 2026-09-01 | Frontier |
Open in the picker Daily check URL: 200 on the frontier, 409 once beaten
Claude Opus 4.8 (Adaptive Reasoning, Max Effort) today
Intelligence: Artificial Analysis Intelligence Index. Cost: total cost to run that benchmark, so reasoning tokens count. API id: claude-opus-4-8.
Compare head to head
Suggested: what beats it, its effort levels, and frontier models near its price.
- Claude Opus 4.8 (max) vs GPT-6 Astra (max)
- Claude Opus 4.8 (max) vs Claude Fable 5.1 (Adaptive Reasoning, Xhigh Effort, Default Fallback)
- Claude Opus 4.8 (max) vs GPT-6 Astra (medium)
- Claude Opus 4.8 (max) vs GPT-6 Astra (high)
- Claude Opus 4.8 (max) vs GPT-6 Astra (xhigh)
- Claude Opus 4.8 (max) vs Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback)
Compare Claude Opus 4.8 (Adaptive Reasoning, Max Effort) with measured models
What the Claude Opus 4.8 release did to the frontier on 2026-05-28
1 of 1 effort levels reached the frontier at launch (Claude Opus 4.8 (max)). Impact 1.58, #17 of 28 releases this past year.
Should you use Claude Opus 4.8 (Adaptive Reasoning, Max Effort)?
Should you use Claude Opus 4.8 (Adaptive Reasoning, Max Effort)?
Only when it fits your setup: GPT-6 Astra (max) is at least as smart for the same money or less, so Claude Opus 4.8 (Adaptive Reasoning, Max Effort) is off the value frontier today.
What is better and cheaper than Claude Opus 4.8 (Adaptive Reasoning, Max Effort)?
GPT-6 Astra (max) — at least as smart for the same money or less.
How much does Claude Opus 4.8 (Adaptive Reasoning, Max Effort) cost?
$5.00/$25 in/out per 1M tokens, and $6874 to run the full Artificial Analysis Intelligence Index, the honest all-in number for reasoning models.
Is Claude Opus 4.8 (Adaptive Reasoning, Max Effort) on the Pareto frontier?
No: GPT-6 Astra (max) beats it on intelligence, cost, or both.
Frontier membership by axis pair
Other axis pairs where Claude Opus 4.8 (Adaptive Reasoning, Max Effort) 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/claude-opus-4-8 · Markdown: /api/v1/models/claude-opus-4-8?format=md · llms.txt · agent skill