What is Muse Spark 1.3?

Muse Spark 1.3 is a large language model from Meta, released on September 2, 2026. It accepts text, image and video input.

When was Muse Spark 1.3 released?

Meta released Muse Spark 1.3 on September 2, 2026.

How much does Muse Spark 1.3 cost?

Muse Spark 1.3 costs $1.25 per 1M input tokens and $4.25 per 1M output tokens through the Meta API. Cached input costs $0.15 per 1M tokens. Prices are from Meta's official pricing as of September 2, 2026.

What is Muse Spark 1.3's context window?

Muse Spark 1.3 has a 1,049K-token context window.

How does Muse Spark 1.3 score on benchmarks?

Muse Spark 1.3 has 10 cited benchmark scores, including AutomationBench 49.6%, DeepSearchQA 90.3% and DeepSWE v1.1 75.4%. Each score links to its source.

Muse Spark 1.3

Meta·Pending·Released 2026-09-02textvisionvideo

Context1,048.576k

Max output-

Input / 1M$1.25 ↗

Output / 1M$4.25 ↗

Cached in$0.15

Benchmarks10

Benchmarks

Cited public sources · rank is exact-benchmark, apples-to-apples

AutomationBench

#2/349.6% ↗

DeepSearchQA

#2/290.3% ↗

DeepSWE v1.1

#2/2075.4% ↗

GDPval-AA v2

#5/81754 ↗

JobBench

#1/564.9% ↗

MRCR 256K-512K

98.5% ↗

MRCR 512K-1M

98.1% ↗

OSWorld 2.0 (partial)

#2/266.9% ↗

SWE-Atlas Codebase QnA

59.4% ↗

Terminal-Bench 2.1

#3/2088.8% ↗

Compare

vs Gemini 4 Argon vs GPT-6.1 Sol vs Claude Sonnet 5.5 vs GPT-6 Sol vs GPT-6 Luna vs Claude Opus 5.5 vs GPT-6 Astra vs GPT-5.6 Sol

Muse Spark 1.3 FAQ

What is Muse Spark 1.3?: Muse Spark 1.3 is a large language model from Meta, released on September 2, 2026. It accepts text, image and video input.
When was Muse Spark 1.3 released?: Meta released Muse Spark 1.3 on September 2, 2026.
How much does Muse Spark 1.3 cost?: Muse Spark 1.3 costs $1.25 per 1M input tokens and $4.25 per 1M output tokens through the Meta API. Cached input costs $0.15 per 1M tokens. Prices are from Meta's official pricing as of September 2, 2026.
What is Muse Spark 1.3's context window?: Muse Spark 1.3 has a 1,049K-token context window.
How does Muse Spark 1.3 score on benchmarks?: Muse Spark 1.3 has 10 cited benchmark scores, including AutomationBench 49.6%, DeepSearchQA 90.3% and DeepSWE v1.1 75.4%. Each score links to its source.

Access Muse Spark 1.3 and every other model through one endpoint with automatic failover: Respan gateway.

Benchmarks

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Muse Spark 1.3 FAQ