Claude Fable 5 (Max, Opus 4.8 Fallback)
By Anthropic · released 2026-06-09 (4 months) · snapshot 2026-10-24
- Intelligence index
- 49.60
- Cost to run the AA index
- $11161
- Price per 1M tokens (in / out)
- $10.0 / $50.0
- End-to-end time
- 71.9s
Is Claude Fable 5 (Max, Opus 4.8 Fallback) on the Pareto frontier, and what beats it?
Off the frontier
No. Claude Opus 5.5 (Max, Default Fallback) is at least as smart for the same money or less, and nothing on the frontier costs more.
| # | Model | Creator | Intelligence | Total cost | E2E total | Open | Released | Frontier |
|---|---|---|---|---|---|---|---|---|
| 1 | Claude Fable 5 (Max, Opus 4.8 Fallback) | Anthropic | 49.60 | $11161 | 71.9s | 2026-06-09 | ||
| 2 | Claude Opus 5.5 (Max, Default Fallback) | Anthropic | 57.60 | $8708 | 626.1s | 2026-09-22 | Frontier |
Open in the picker Daily check URL: 200 on the frontier, 409 once beaten
Claude Fable 5 (Max, Opus 4.8 Fallback) today
Intelligence: Artificial Analysis Intelligence Index. Cost: total cost to run that benchmark, so reasoning tokens count. API id: claude-fable-5.
Compare head to head
Suggested: what beats it, its effort levels, and frontier models near its price.
- Claude Fable 5 (Max, Opus 4.8 Fallback) vs Claude Opus 5.5 (Max, Default Fallback)
- Claude Fable 5 (Max, Opus 4.8 Fallback) vs Claude Opus 5.5 (Xhigh, Default Fallback)
Compare Claude Fable 5 (Max, Opus 4.8 Fallback) with measured models
What the Claude Fable 5 release did to the frontier on 2026-06-09
1 of 1 effort levels reached the frontier at launch (Claude Fable 5 (Max, Opus 4.8 Fallback)). Impact 1.98, #18 of 46 releases this past year.
Should you use Claude Fable 5 (Max, Opus 4.8 Fallback)?
Should you use Claude Fable 5 (Max, Opus 4.8 Fallback)?
Only when it fits your setup: Claude Opus 5.5 (Max, Default Fallback) is at least as smart for the same money or less, so Claude Fable 5 (Max, Opus 4.8 Fallback) is off the value frontier today.
What is better and cheaper than Claude Fable 5 (Max, Opus 4.8 Fallback)?
Claude Opus 5.5 (Max, Default Fallback) — at least as smart for the same money or less.
How much does Claude Fable 5 (Max, Opus 4.8 Fallback) cost?
$10/$50 in/out per 1M tokens, and $11161 to run the full Artificial Analysis Intelligence Index, the honest all-in number for reasoning models.
Is Claude Fable 5 (Max, Opus 4.8 Fallback) on the Pareto frontier?
No: Claude Opus 5.5 (Max, Default Fallback) beats it on intelligence, cost, or both.
Frontier membership by axis pair
Other axis pairs where Claude Fable 5 (Max, Opus 4.8 Fallback) 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-fable-5 · Markdown: /api/v1/models/claude-fable-5?format=md · llms.txt · agent skill