Meta

Muse Spark 1.3

CTX1.05M

93Quality

Reasoning · Vision · Tools

Input$1.25/M

Output$4.25/M

Muse Spark 1.3 is a multimodal reasoning model from Meta for long-running agentic, multi-agent, and coding workflows. It improves long-horizon agent collaboration, instruction following, and coding efficiency relative to Muse Spark 1.2.

PaidProprietary993/1040

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MetaTextUncommon

Muse Spark 1.3

muse-spark-1.3

Type: Text
Quality: 93 · Top 7% on the Epoch Capabilities Index
Context window: 1,048,576 tokens
Max output: 131,072 tokens
Input price: $1.25 / 1M tokens
Output price: $4.25 / 1M tokens
Cache read: $0.15 / 1M tokens
Cache write: —
Released: Sep 2, 2026
Knowledge cutoff: —
Takes in: Text, Image, Audio, Video, PDF
Puts out: Text
Reasoning: Yes
Tool calling: Yes
Structured output: Yes
File attachments: Yes
Access: Paid
License: Proprietary
Rarity: Uncommon
Set number: 993/1040

Open Meta docs Quality 93 Where to run it 15 Evolution 3/3 Meet its creature Battle GLM-5.3

Weights aren’t public. Use is governed by Meta’s terms. Specs from models.dev, last changed Oct 18, 2026. Official source: dev.meta.ai.

How good is it?

Public leaderboard scores for Muse Spark 1.3, refreshed daily from Epoch AI and LMArena.

Top 7% of the 277 models on the Epoch Capabilities Index: #21.

Quality is the share of a leaderboard’s models this one beats, from 0 to 100. Chat models are rated on Epoch AI’s Capabilities Index when it lists them, otherwise on LMArena; image and video models on LMArena’s image and video arenas.

Leaderboards

Epoch Capabilities Index#21 of 277
One number fitted from dozens of hard benchmarks, from science questions to agentic coding.156.8 index
LMArena Text#12 of 416
People compare two anonymous answers and vote for the better one.1,490 rating
Listed as Muse Spark 1.3 (Max)
LMArena Text · Coding#14 of 411
The text arena’s coding prompts only.1,510 rating
Listed as Muse Spark 1.3 (Max)
LMArena Text · Math#18 of 400
The text arena’s math prompts only.1,496 rating
Listed as Muse Spark 1.3 (Max)
LMArena Text · Creative writing#24 of 414
The text arena’s creative writing prompts only.1,460 rating
Listed as Muse Spark 1.3 (Max)
LMArena WebDev#12 of 144
Each model builds a web app from the same prompt; people pick the better one.1,658 rating
Listed as Muse Spark 1.3 (Max)
LMArena Vision#13 of 165
Questions about images, voted by people.1,309 rating
Listed as muse-spark-1.3-max

Benchmarks Epoch AI runs

Scores from Epoch AI and LMArena, licensed CC BY 4.0. Boards list models under their own names, so a close match is shown with the name it was scored under. Credits

Where to run it

15 providers sell Muse Spark 1.3 through an API. Prices are per million tokens, cheapest first.

CheapestCommandCode$0.10 in · $0.20 out
From the labMeta$1.25 in · $4.25 out

API providers

Provider	Input	Output	Context
CommandCodeCheapest paid`meta/muse-spark-1.3-contributor`	$0.10	$0.20	1.05M
Cloudflare AI Gateway`meta/muse-spark-1.3`	$1.25	$4.25	1.05M
DevPass (LLM Gateway)`muse-spark-1.3`	$1.25	$4.25	1.05M
EmpirioLabs AI`muse-spark-1-3`	$1.25	$4.25	1.05M
Kilo Gateway`meta/muse-spark-1.3`	$1.25	$4.25	1.05M
LLM Gateway`meta/muse-spark-1.3`	$1.25	$4.25	1.05M
MetaOfficial`muse-spark-1.3`	$1.25	$4.25	1.05M
NanoGPT`meta/muse-spark-1.3`	$1.25	$4.25	1.05M
OpenCode`muse-spark-1.3`	$1.25	$4.25	1.05M
OpenRouter`meta/muse-spark-1.3`	$1.25	$4.25	1.05M

Show 5 more providers

Provider	Input	Output	Context
Opper`muse-spark-1.3`	$1.25	$4.25	1.05M
Requesty`muse-spark-1.3`	$1.25	$4.25	1.05M
Vercel AI Gateway`meta/muse-spark-1.3`	$1.25	$4.25	1.05M
AIHubMix`muse-spark-1.3`	$1.38	$4.67	1.05M
AI/ML API`meta/muse-spark-1.3`	$1.72	$5.85	1.05M

From models.dev and Hugging Face, checked daily. Resellers’ listings can lag behind their price pages, so confirm with the provider before you commit.

Face off

Current text models from other labs at a similar output price.

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