Question 1

What is Muse Spark 1.3?

Accepted Answer

Muse Spark 1.3 is a model from Meta, released on Sep 2, 2026. 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...

Question 2

How much does Muse Spark 1.3 cost?

Accepted Answer

On the Respan gateway, input starts at $1.25 per 1M tokens on every provider, and output starts at $4.25 per 1M tokens on every provider, after gateway discounts.

Question 3

Which providers serve Muse Spark 1.3 on Respan?

Accepted Answer

3 providers serve Muse Spark 1.3: EmpirioLabs, Meta, and OpenRouter.

Question 4

What is Muse Spark 1.3's context window?

Accepted Answer

Muse Spark 1.3 accepts up to 1.0M tokens of context on its largest provider route.

Question 5

How do I use Muse Spark 1.3 with the Respan gateway?

Accepted Answer

Point any OpenAI-compatible SDK at https://api.respan.ai/api/ with your Respan API key and set the model to "meta/muse-spark-1.3". To set it up with a coding agent, copy the agent setup prompt at the top of this page.

Question 6

How fast is Muse Spark 1.3?

Accepted Answer

Over the last 30 days of requests through the Respan gateway, the fastest provider was Meta at 10411 tokens per second, and the lowest response latency was 1.8 seconds on OpenRouter. Speed varies with request size and provider.

Question 7

Where does Muse Spark 1.3 rank on the Respan Index?

Accepted Answer

Muse Spark 1.3 scores 54.1 out of 100 on the Respan Index v1.1, ranking #13 of 138 models. By category: Coding 42.0, Agents 65.9, Reasoning 49.0, Knowledge & language 63.2, and Human preference 56.7. The Respan Index combines independent and lab-reported benchmark results into one score, using benchmark data collected by llmmetric.com.

Question 8

How does Muse Spark 1.3 score on benchmarks?

Accepted Answer

Muse Spark 1.3 has 29 published benchmark scores, including Terminal-Bench 2.1 88.8%, DeepSearchQA 90.3%, and MRCR 256K-512K 98.5%. Each score links to where it was published; the data is collected by llmmetric.com.

Provider	Context	Input	Output
EmpirioLabs`empiriolabs/muse-spark-1-3`	1.0M	$1.25/M	$4.25/M
Meta`meta/muse-spark-1.3`	1.0M	$1.25/M	$4.25/M
OpenRouter`openrouter/meta/muse-spark-1.3`	1.0M	$1.25/M	$4.25/M

Muse Spark 1.3

Providers

Certified where it counts.

Pricing

Cost by volume

Throughput and latency

Output speed

Time to first token

Response latency

Benchmarks

Respan Indexv1.1

Coding5

Apps

Muse Spark 1.3 FAQ

Works with your entire stack

Built for AI agents.
Break less.
Ship more.

Agents7

Reasoning7

Math4

Knowledge2

Arena4