Muse Spark Open (Xhigh)

By Meta · released 2026-10-15 (9 days) · snapshot 2026-10-24

Off the frontierNot on frontier at launch dayopen weights

Intelligence index: 38.90
Cost to run the AA index: $1185
Price per 1M tokens (in / out): $1.25 / $4.25
End-to-end time: 17.3s

Better than…

Is Muse Spark Open (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.

Muse Spark Open (Xhigh) vs GPT-6.1 Sol (Max)Muse Spark Open (Xhigh) vs Claude Opus 5.5 (High, Default Fallback)

#	Model	Creator	Intelligence	Total cost	E2E total	Released	Frontier
1	Muse Spark Open (Xhigh)	Meta	38.90	$1185	17.3s	2026-10-15
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

Matchup

Compare head to head

Suggested: what beats it, its effort levels, and frontier models near its price.

Compare Muse Spark Open (Xhigh) with measured models

Release

What the Muse Spark Open release did to the frontier on 2026-10-15

None of its 1 effort levels reached the frontier at launch.

Closest miss: Muse Spark Open (Xhigh), 2.3 points below Claude Haiku 5.5 (Xhigh) at 7.5× the cost.

Release page: launch-day frontier and every effort level

Deciding

Should you use Muse Spark Open (Xhigh)?

Only when it fits your setup: GPT-6.1 Sol (Max) is at least as smart for the same money or less, so Muse Spark Open (Xhigh) is off the value frontier today.

What is better and cheaper than Muse Spark Open (Xhigh)?

GPT-6.1 Sol (Max) — at least as smart for the same money or less.

How much does Muse Spark Open (Xhigh) cost?

$1.25/$4.25 in/out per 1M tokens, and $1185 to run the full Artificial Analysis Intelligence Index, the honest all-in number for reasoning models.

Is Muse Spark Open (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 Muse Spark Open (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

Agents: Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/models/muse-spark-open · Markdown: /api/v1/models/muse-spark-open?format=md · llms.txt · agent skill

Is Muse Spark Open (Xhigh) on the Pareto frontier, and what beats it?

Off the frontier