MetaReasoningReleased 2 September 2026
Muse Spark 1.3 pricing, context and benchmark
Muse Spark 1.3 is a multimodal reasoning model from Meta for long-running agentic, multi-agent, and coding workflows.
1.05M
Input context
944K
Output context
$1.25
Official input
$4.25
Official output
37
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 1.3 |
| Model ID | meta/muse-spark-1.3 |
| Provider | Meta |
| Release date | 2 September 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 |
| Output modalities | text |
| Reasoning control | Not exposed |
| Tool support | Text generation only |
| Tokenizer | Other |
| Provider routes | 1 endpoint |
| Artificial Analysis index | 37 (#40 of 74) |
| Speed | 126 tokens/s, 25.98s 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 | no | no | not supported |
| Video | ✓ yes | no | $1.25 in |
| File (PDF) | ✓ yes | no | $1.25 in |
02 · Overview
What is Muse Spark 1.3?
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...
Muse Spark 1.3 carries a 1.05M token window, uses the Other tokenizer and is served by Meta. On Hoodgen it sits in the Reasoning 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
Released2 September 2026
| Property | Muse Spark 1.2 Contributor | Muse Spark 1.3 | Change |
|---|---|---|---|
| Released | 2026 | Sep 2026 | Newer release |
| Context | 1.05M | 1.05M | Unchanged |
| Max output | 944K | 944K | Unchanged |
| Input price | $0.1 | $1.25 | Higher |
| Output price | $0.2 | $4.25 | Higher |
| Input modalities | text, image, video, file | text, image, video, file | Unchanged |
| AA index | n/a | 37 | Newer benchmark run |
04 · Capabilities
Features and capabilities
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Vision
Screenshots, charts and photographed documents are read at the text token rate.
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Files and PDFs
Documents go in as files rather than pasted text, keeping layout and tables intact.
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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 1.3 scores 37 , ranking #40 of 74.
Intelligence index
37
#40 of 74
Cost per task
$2.39
weighted average per index task
Time per task
12.1m
inference time
Output speed
126
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 1.3?
Debugging and root cause
Multi file failures where the model has to hold a causal chain before answering.
Architecture and planning
Design docs, migration plans and trade off analysis over long context.
Data analysis
Spreadsheets and logs read in one pass, then summarised with the numbers quoted back.
Agentic coding
Repo wide changes that need plan, edit and verify loops.
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 1.3 pricing
Official pricing
List price
$1.25 / 1M in
$4.25 / 1M out
- $0.15 cached input
- 1.05M context
- text, image, video, file input
Cheapest route
$1.25 / 1M in
$4.25 / 1M out
- 1 route on OpenRouter
- What Hoodgen routes to first
- Same model, lower bill
Market pricing, every route
| Provider | Tier | Input | Output | Cache read | Uptime 24h |
|---|---|---|---|---|---|
| Meta | 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-1.3 |
| Endpoint | https://openrouter.ai/api/v1/chat/completions |
| Parameters | prompt and max_tokens |
| Streaming | Yes, server sent events |
| Modality string | text+image+file+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-1.3",
"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 1.3 vs other Meta models
| Model | Context | Input /1M | Output /1M | AA index | Released |
|---|---|---|---|---|---|
| Muse Spark 1.3 | 1.05M | $1.25 | $4.25 | 37 | Sep 2026 |
| Muse Wonder | 1.05M | $4 | $20 | 44 | Oct 2026 |
| Muse Spark Open | 1.05M | $1.25 | $4.25 | 25 | Oct 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 1.3 questions, answered
Muse Spark 1.3 is a reasoning model from Meta, released 2 September 2026. Muse Spark 1.3 is a multimodal reasoning model from Meta for long-running agentic, multi-agent, and coding workflows.
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Start chatting with Muse Spark 1.3
Free to try on Hoodgen AI, with a live credit estimate before every send. No API key, no setup.