meta / text-generation API-only released 2026-09-02

Muse Spark 1.3

Name: Muse Spark 1.3
Price: 1.25 USD
Author: meta

Muse Spark 1.3 is a multimodal reasoning model from Meta for long-running agentic, multi-agent, and coding workflows. It is designed to keep track of information across extended tasks, work through...

Input / 1M

$1.25

Output / 1M

$4.25

Context

AA Intelligence

48.1

Closed weights — available only as a hosted API text + image + video + file → text View on OpenRouter ↗

Pricing

via OpenRouter · USD per 1M tokens · synced 2026-10-24

$1.25

input / 1M

$4.25

output / 1M

$0.15

cached input / 1M

$5.50

1M in + 1M out

Context window: 1,048,576 tokens
Max output: 943,718 tokens
Providers: 1
Cheapest provider: Meta · $1.25 / $4.25
Best throughput: —
AA Intelligence / Coding / Agentic: 48.1 / 75.8 / 55.5

✓ Tool calling ✓ Reasoning ✓ Structured outputs ✓ Image input ✓ File input ✗ Audio input ✓ Prompt caching

Price history

tracking started — chart appears after 7 days of snapshots (6 recorded)

Current: $1.25 input · $4.25 output per 1M tokens

Benchmarks

Third-party indices as published through OpenRouter — Artificial Analysis and Design Arena. Not measured by us.

AA Intelligence Index: 48.1
AA Coding Index: 75.8
AA Agentic Index: 55.5

Design Arena

CategoryEloWin %Rank

blender3d 1194 49.3% #11

fullstack 1312 60.8% #3

mobileapps 1221 49.8% #13

python-pptxslides 1201 51.4% #10

spreadsheet 1085 29.4% #13

webapps 1297 56.6% #6

3d 1397 63.5% #5

asciiart 1282 53.6% #4

codecategories 1351 57% #6

dataviz 1343 58% #6

gamedev 1346 56% #8

svg 1324 54.6% #2

uicomponent 1348 58% #4

website 1355 58.2% #2

godotgamedev 1241 45.8% #7

Providers

1 provider · per 1M tokens · last 30 min metrics

Provider	Quant	Context	Input	Output	Uptime	Tok/s
Meta	unknown	1M	$1.25	$4.25	100%	—

Provider data from OpenRouter's endpoint listing, refreshed daily.

Specifications

Organisation: meta
Released on OpenRouter: 2026-09-02
Context window: 1,048,576 tokens
Max output: 943,718 tokens
Input: text, image, video, file
Output: text
Tokenizer: Other
Moderated by provider: Yes
OpenRouter id: meta/muse-spark-1.3

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Prices, context and providers from the public OpenRouter API, snapshotted daily; benchmark indices from Artificial Analysis. See /methodology.