MetaMultimodalReleased 15 October 2026
Muse Spark Open pricing, context and benchmark
Muse Spark Open is a coding-optimized open-weight model.
1.05M
Input context
944K
Output context
$1.25
Official input
$4.25
Official output
25
AA index
01 · Model Overview
Everything that matters, in one table
Context, pricing, cache, modalities and tooling, from the model registry and Artificial Analysis.
| Model | Muse Spark Open |
| Model ID | meta/muse-spark-open |
| Provider | Meta |
| Release date | 15 October 2026 |
| Status | Generally available |
| Input context | 1,048,576 tokens |
| Output context | 943,718 tokens |
| Official input pricing | $1.25 per 1M tokens |
| Official output pricing | $4.25 per 1M tokens |
| Cache read pricing | $0.15 per 1M tokens (88% off input) |
| Market input pricing | $1.25 per 1M (cheapest route) |
| Market output pricing | $4.25 per 1M (cheapest route) |
| Input modalities | text · image · video · file · audio |
| Output modalities | text |
| Reasoning control | Not exposed |
| Tool support | Text generation only |
| Tokenizer | Other |
| Provider routes | 5 endpoints |
| Artificial Analysis index | 25 (#12 of 26) |
| Speed | 198 tokens/s, 10.14s to first token |
| Knowledge cutoff | Not publicly stated |
Input and output support
| Modality | Input | Output | Billed at |
|---|---|---|---|
| Text | ✓ yes | ✓ yes | $1.25 in |
| Image | ✓ yes | no | $1.25 in |
| Audio | ✓ yes | no | $1.25 in |
| Video | ✓ yes | no | $1.25 in |
| File (PDF) | ✓ yes | no | $1.25 in |
02 · Overview
What is Muse Spark Open?
Muse Spark Open is a coding-optimized open-weight model.
Trained specifically for agentic coding workflows, it delivers higher first-attempt accuracy, reliable tool calling, and deep codebase understanding across the repos developers...
Muse Spark Open carries a 1.05M token window, uses the Other tokenizer and is served by Meta. On Hoodgen it sits in the Multimodal tier of the model menu next to its siblings, so you can switch mid conversation without losing the thread.
03 · Release
Release and what changed from the previous version
Released15 October 2026
| Property | Muse Wonder | Muse Spark Open | Change |
|---|---|---|---|
| Released | Oct 2026 | Oct 2026 | Same release window |
| Context | 1.05M | 1.05M | Unchanged |
| Max output | 944K | 944K | Unchanged |
| Input price | $4 | $1.25 | Cheaper |
| Output price | $20 | $4.25 | Cheaper |
| Input modalities | text, image, video, file, audio | text, image, video, file, audio | Unchanged |
| AA index | 44 | 25 | Newer benchmark run |
04 · Capabilities
Features and capabilities
◉
Vision
Screenshots, charts and photographed documents are read at the text token rate.
▤
Files and PDFs
Documents go in as files rather than pasted text, keeping layout and tables intact.
♪
Audio and video
Calls, meetings and screen recordings can be summarised in one pass.
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Prompt caching
Cached input costs $0.15 per million instead of $1.25, so stable prefixes get cheaper.
06 · Benchmarks
Benchmark results and performance
Artificial Analysis Intelligence Index v5.0.1 blends nine evaluations. Muse Spark Open scores 25 , ranking #12 of 26.
Intelligence index
25
#12 of 26
Cost per task
$2.02
weighted average per index task
Time per task
5.6m
inference time
Output speed
198
tokens per second
Index score and cost per task
Scale: index 0 to 70, cost 0 to $20. Sub scores are not published per evaluation, so none are invented here.
07 · Use cases
What can you do with Muse Spark Open?
Document understanding
Screenshots, charts, scanned pages and PDFs read in the prompt.
Mixed media briefs
One thread holding text, images and files together.
Extraction
Schema constrained JSON out of messy inputs.
Research synthesis
Several sources condensed with the figures preserved.
08 · Cost levers
Prompt caching and how to cut the bill
Cached input bills at $0.15 per million instead of $1.25, a 88% discount. Keep the system prompt and documents first and the changing question last, so every call hits the cache.
09 · Pricing
Muse Spark Open pricing
Official pricing
List price
$1.25 / 1M in
$4.25 / 1M out
- $0.15 cached input
- 1.05M context
- text, image, video, file, audio input
Cheapest route
$1.25 / 1M in
$4.25 / 1M out
- 5 routes on OpenRouter
- What Hoodgen routes to first
- Same model, lower bill
Market pricing, every route
| Provider | Tier | Input | Output | Cache read | Uptime 24h |
|---|---|---|---|---|---|
| Makora | standard | $1.25 | $4.25 | $0.15 | 100.0% |
| Modal | standard | $1.25 | $4.25 | $0.15 | 99.8% |
| Together | standard | $1.25 | $4.25 | $0.15 | 100.0% |
| Nebius | standard | $1.25 | $4.25 | $0.15 | 96.4% |
| BaseTen | standard | $1.25 | $4.25 | $0.15 | 100.0% |
API pricing and cost calculator
| Rate | Per call | Total | Credits |
|---|---|---|---|
| Cheapest route | $0.0182 | $9.09 | 8634 |
| List price | $0.0182 | $9.09 | 8634 |
10 · Developers
API and developer information
| Model ID | meta/muse-spark-open |
| Endpoint | https://openrouter.ai/api/v1/chat/completions |
| Parameters | prompt and max_tokens |
| Streaming | Yes, server sent events |
| Modality string | text+image+file+audio+video->text |
| Max prompt tokens | 1,048,576 |
| Max completion tokens | 943,718 |
curl https://openrouter.ai/api/v1/chat/completions \
-H "Authorization: Bearer $OPENROUTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "meta/muse-spark-open",
"messages": [{ "role": "user", "content": "Summarise this document." }],
"max_tokens": 1024
}'11 · Limitations
Model limitations
| Text only output | It cannot generate images, audio or video. Pair it with an image model on Hoodgen when you need visuals. |
| Output cap | 943,718 tokens per request. Long deliverables have to be chunked. |
| Knowledge cutoff | The provider does not state a fixed cutoff for every release. Verify very recent events against search. |
12 · Comparison
Muse Spark Open vs other Meta models
| Model | Context | Input /1M | Output /1M | AA index | Released |
|---|---|---|---|---|---|
| Muse Spark Open | 1.05M | $1.25 | $4.25 | 25 | Oct 2026 |
| Muse Wonder | 1.05M | $4 | $20 | 44 | Oct 2026 |
| Muse Spark 1.3 | 1.05M | $1.25 | $4.25 | 37 | Sep 2026 |
| Muse Spark 1.2 | 1.05M | $1.25 | $4.25 | n/a | 2026 |
| Muse Spark 1.1 | 1.05M | $1.25 | $4.25 | n/a | 2026 |
| Muse Glimmer 30B | 131K | $0.3 | $1.2 | n/a | 2026 |
13 · Privacy
Privacy and data policy
- On Hoodgen, prompts and attachments answer that request and stay in your conversation history so you can reopen it. They are not used to train models.
- Requests route through OpenRouter to Meta and are covered by that provider's API terms.
- Do not paste secrets or personal data you would not send to any hosted model.
14 · FAQ
Muse Spark Open questions, answered
Muse Spark Open is a multimodal model from Meta, released 15 October 2026. Muse Spark Open is a coding-optimized open-weight model.
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Start chatting with Muse Spark Open
Free to try on Hoodgen AI, with a live credit estimate before every send. No API key, no setup.