$ diff longcat-2-0 muse-spark

LongCat-2.0 vs Muse Spark

Values come from LongCat-2.0 and Muse Spark, where each is cited to its source. This page states no benchmark result and ranks neither model — it puts two published specifications next to each other. Where a lab has not published a figure, the row says so rather than guessing.

MeituanLongCat-2.0

context: 1M
weights: open
$/M in: $0.3
$/M out: $1.2

Meta AIMuse Spark

context: 1M
weights: open
$/M in: $1.25
$/M out: $4.25

What actually differs

Context window: Identical — both accept 1M tokens, so context length is not a reason to pick either.
Input price: LongCat-2.0 at $0.3/M against $1.25/M — 4.2× cheaper to feed. Standard rates: one of these labs also quotes a lower cached-input tier, which applies only when a prefix is reused — see the full spec below.
Output price: LongCat-2.0 at $1.2/M against $4.25/M — 3.5× cheaper to generate. Output dominates the bill on most agentic workloads, where the model writes far more than it reads.
Weights: Both publish weights — LongCat-2.0 under MIT (commercially permissive), Muse Spark under proprietary (closed / API-only, not open-weights). Check the licences rather than assuming they permit the same commercial use.
Recency: LongCat-2.0 shipped 83 days after Muse Spark (2026-06-30 vs 2026-04-08).

Full spec

Attribute	LongCat-2.0	Muse Spark
Developer	Meituan	Meta AI
Released	2026-06-30	2026-04-08
Context window	1 million tokens (LongCat Sparse Attention / LSA)	1,000,000 tokens (1.1)
Pricing	$0.30/M input · $1.20/M output ($0.006/M cached input) — OpenRouter catalogue, read 2026-07-28. Open weights, so this is hosted-inference pricing rather than a licence fee.	$1.25/M input · $4.25/M output (Meta Model API, public preview)
License	MIT (commercially permissive)	proprietary (closed / API-only, not open-weights)
Availability	Open-sourced 2026-06-30; previously served on OpenRouter under the codename "Owl Alpha"	Meta Model API (public preview, US-based developers only)

How these pages are produced

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