Meta: Muse Spark 1.3
Muse Spark 1.3 is a reasoning model from Meta released on Sep 2, 2026. It reads text, images, files, audio and video and writes text, with a 1.05M token context window and up to 131K tokens per reply.
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It costs $1.25 per million input tokens and $4.25 per million output tokens. Cached input bills at $0.15, 88% less than fresh input.
It supports tool calling, structured JSON output and prompt caching.
13 providers serve it, including Vercel AI Gateway, Bothub and Cloudflare AI Gateway. The lowest input price is $0.10 per million tokens at Bothub.
On the Artificial Analysis Intelligence Index it scores 48.1, which places it in the top ten, at number 6, among the 43 models I track with independent scores.
- Modalities
- In / out price
- $1.25 / $4.25 per 1M
- Context
- 1.05M
- Max output
- 131K
- Released
- Sep 2, 2026
- Knowledge cutoff
- n/a
- Tool calling
- Structured output
- Reasoning
- Prompt caching
- Open weights
- Free to use
Muse Spark 1.3 pricing
USD, as listed on Oct 15, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.
| Input | $1.25 / 1M tokens | |
|---|---|---|
| Output | $4.25 / 1M tokens | |
| Cached input (read) | $0.15 / 1M tokens | 88% off input |
Muse Spark 1.3 providers
13 providers serve it, including Vercel AI Gateway, Bothub and Cloudflare AI Gateway. The lowest input price is $0.10 per million tokens at Bothub. Each host sets its own price and limits, so the cheapest one is not always the one with the longest context.
| Provider | Input /M | Output /M | Cache read /M | Context | Max output |
|---|---|---|---|---|---|
| Meta First party | $1.25 | $4.25 | $0.15 | 1.05M | 131K |
| Vercel AI Gateway | $1.25 | $4.25 | $0.15 | 1.05M | 1.05M |
| Bothub | $0.10 | $0.20 | – | 1.05M | 944K |
| Cloudflare AI Gateway | $1.25 | $4.25 | $0.16 | 1.05M | 131K |
| DevPass (LLM Gateway) | $1.25 | $4.25 | $0.15 | 1.05M | 131K |
| EmpirioLabs AI | $1.25 | $4.25 | $1 | 1.05M | 131K |
| Kilo Gateway | $1.25 | $4.25 | $0.15 | 1.05M | 944K |
| LLM Gateway | $1.25 | $4.25 | $0.15 | 1.05M | 1.05M |
| NanoGPT | $1.25 | $4.25 | $0.15 | 1.05M | 944K |
| Opper | $1.25 | $4.25 | $0.15 | 1.05M | 131K |
| Requesty | $1.25 | $4.25 | $0.15 | 1.05M | 944K |
| AIHubMix | $1.38 | $4.67 | $0.165 | 1.05M | 131K |
Showing 12 of 13 providers: the lab first, then the major clouds, then the cheapest resellers.
What Muse Spark 1.3 costs per month
Pick a workload close to yours or type your own volumes.
Independent benchmarks
Measured by third parties, not reported by Meta. Each links to its source and shows the date I checked it.
A composite of 10 independent evaluations (agents 30%, coding 20%, scientific reasoning 20%, general 30%), run by Artificial Analysis on each model, version 4.3.2.
Artificial Analysis, checked Oct 10, 2026
Human preference: people compare two anonymous answers and pick the better one. Ratings from the Text Arena overall board, style control on.
Arena (formerly LMArena), checked Oct 10, 2026
Agentic coding in a real terminal: can the model, driving an agent harness, finish multi step software and ops tasks. Resolution rate.
Terminal-Bench, checked Oct 10, 2026
Expert level questions across many fields, no tools allowed. The Diamond set is 1,000 questions. Few models are on it yet.
Scale Labs, checked Oct 10, 2026
Median output tokens per second measured by Artificial Analysis on the provider API, for the same model setting as its index score.
Artificial Analysis, checked Oct 10, 2026
Supported request parameters
What you can set when you call Muse Spark 1.3 through an OpenAI compatible API.
- Tools
tools - Structured outputs
structured_outputs - Reasoning
reasoning - Temperature
temperature
Alternatives to Muse Spark 1.3
Models that take the same inputs and call tools, closest in price, cheaper ones first.
- 1.05M context
Reads text, images, files, audio and video. Tool calling, structured output, reasoning. Served by 15 providers.
by metaAug 5, 2026$1.25/M input tokens$4.25/M output tokens15 providers
- Index 40.9
Reads text, images, files, audio and video. Tool calling, structured output, reasoning. Served by 24 providers.
by googleSep 2, 20261.05M context$0.75/M input tokens$3.75/M output tokens24 providers
- 1.05M context
Reads text, images, files, audio and video. Tool calling, structured output, reasoning. Served by 25 providers.
by googleJul 9, 2026$0.75/M input tokens$3.75/M output tokens25 providers
- 1.05M context
Reads text, images, files, audio and video. Tool calling, structured output, reasoning. Served by 27 providers.
by googleDec 17, 2025$0.50/M input tokens$3/M output tokens27 providers
- 1.05M context
Reads text, images, files, audio and video. Tool calling, structured output, reasoning. Served by 24 providers.
by googleAug 13, 2026$0.75/M input tokens$3.75/M output tokens24 providers
- 1.05M context
Reads text, images, files, audio and video. Tool calling, structured output, reasoning. Served by 6 providers.
by googleAug 13, 2026$0.75/M input tokens$3.75/M output tokens6 providers
More from Meta
- 1.05M context
Reads text, images, files, audio and video. Tool calling, structured output, reasoning. Served by 7 providers.
by metaOct 12, 2026$4/M input tokens$20/M output tokens7 providers
- 1.05M context
Reads text, images, files, audio and video. Tool calling, structured output, reasoning. Served by 4 providers.
by metaSep 2, 2026$0.10/M input tokens$0.20/M output tokens4 providers
Muse Image 1.0
ImageGenerates images from text and images.
by metaAug 26, 2026
- Index 17.5
Reads text and images. Reasoning.
by metaAug 10, 2026128K context
- 131K context
Reads text and images. Tool calling, structured output, reasoning. Served by 12 providers.
by metaAug 10, 2026$0.35/M input tokens$1.50/M output tokens12 providers
- 1.05M context
Reads text, images, files, audio and video. Tool calling, structured output, reasoning. Served by 15 providers.
by metaAug 5, 2026$1.25/M input tokens$4.25/M output tokens15 providers
Muse Spark 1.3 questions
How much does the Muse Spark 1.3 API cost?
$1.25 per million input tokens and $4.25 per million output tokens, with cached input at $0.15. The estimator on this page turns that into a monthly bill for your own workload.
What is the context window of Muse Spark 1.3?
1,048,576 tokens of input, and it can write up to 131,072 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.
Which providers serve Muse Spark 1.3?
13 providers serve it, including Vercel AI Gateway, Bothub and Cloudflare AI Gateway. The lowest input price is $0.10 per million tokens at Bothub. Prices differ by host, so the Providers table on this page lists each one with its input and output price.
Does Muse Spark 1.3 support tool calling?
Yes. It accepts tool definitions and can return JSON that matches a schema, which is what an agent needs to call your APIs.
Is Muse Spark 1.3 open source?
No. Meta serves it through an API only, so you cannot download the weights or host it yourself.
When was Muse Spark 1.3 released?
Sep 2, 2026.
How good is Muse Spark 1.3 compared with other models?
It scores 48.1 on the Artificial Analysis Intelligence Index and 1494 on the Arena text leaderboard. Benchmarks are a shortlist, not a verdict: test the top two or three candidates on your own tasks before you commit.
Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 15, 2026. Independent scores from my hand checked rankings, sources linked above. The summary is written from these facts.
Building on Muse Spark 1.3?
I test your real tasks on it and the two closest alternatives, then ship the agent on whichever wins on cost and accuracy.
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