Muse Ember 1.0
No published training cutoff
muse-ember-1.0
$0.10 in, $0.50 out per 1M tokens
Muse Spark 1.3
Meta’s current flagship (closed) for agentic coding and multimodal (video/doc) understanding.
Model idmuse-spark-1.3
Price$1.25 in, $4.25 out per 1M tokens
Checked29 September 2026
No published training cutoff
At least1,592events since its release on 2 September 2026
71 historic, 353 major. 72 days of news.
Meta doesn’t publish a training cutoff, so we count from its release date. The real gap is larger.
How to call it
3 ways to use Muse Spark 1.3, with the model id each provider expects.
| Provider | Model id | Endpoint | Docs |
|---|---|---|---|
| Meta Model API | muse-spark-1.3 |
https://api.meta.ai/v1/chat/completions |
dev.meta.ai |
| OpenRouter | meta/muse-spark-1.3 |
openrouter.ai | |
| Web app | meta.ai |
Pricing
| Input | $1.25 per 1M tokens |
|---|---|
| Cached input | $0.15 per 1M tokens |
| Output | $4.25 per 1M tokens |
As published: “per 1M tokens (USD), standard tier; “contributor” tier muse-spark-1.3-contributor is $0.10/$0.002 cached/$0.20”.
Source: dev.meta.ai, checked 29 September 2026.
Specs
- Input
- Text, images, video and PDF
- Output
- Text
- Context window
- 1,000,000 tokens
- Max output
- 200,000 tokens
- Open weights
- No
- Licence
- Proprietary
- Training cutoff
- Not published
- Released
- 2 September 2026
- Status
- Current
- Type
- Reasoning model
What stands out
What its maker marketed at launch, and what people found later, each with its source.
Closed-weights successor to Llama
Proprietary model from Meta Superintelligence Labs; Muse Spark replaced Llama in Meta AI in April 2026.
Native video + document perception
Natively multimodal input (video, images, documents, text) with 1M context and 200K max output.
Long-horizon multi-agent tuning
1.3 tuned for long-running, multi-agent agentic builds; also powers Meta’s Muse Code.
Contributor pricing tier
Separate -contributor model ids priced ~90% lower (data-sharing tier).
Notes
Other ids: muse-spark-1.2, muse-spark-1.1, muse-spark-1.3-contributor, muse-spark-1.2-contributor. OpenAI-SDK-compatible API (public preview, self-serve). Knowledge cutoff not published.
curl https://api.meta.ai/v1/chat/completions -H "Authorization: Bearer $MODEL_API_KEY" -H "Content-Type: application/json" \
-d '{"model":"muse-spark-1.3","messages":[{"role":"user","content":"Hello"}]}'
Sources: https://dev.meta.ai/models/muse-spark/ , https://dev.meta.ai/docs/ , https://research.meta.ai/blog/introducing-muse-spark-1-3
Not yet checked against an official source: Contributor tier data terms not verified.