# Muse Ember

Muse Ember is Meta's latest language model in our dataset, released Nov 9, 2026. Proprietary, API access only. Meta's smallest, cheapest Muse model for high-volume agent work (tool calls, routing, sub-agent coding, extraction), launched Nov 9, 2026 on the Meta Model API and in Muse Code. Verified against vendor sources on Nov 9, 2026.

Primary source (source of record; Agentic Weekly is the fast independent index): https://research.meta.ai/blog/muse-ember

Last verified: 2026-11-09 · Evidence: Reported · Canonical: https://theagenticweekly.com/models/muse-ember · JSON: https://theagenticweekly.com/api/models/muse-ember

## Key facts

| Fact | Value | Source | Label | Anchor |
|---|---|---|---|---|
| Vendor | Meta |  | editorial | https://theagenticweekly.com/models/muse-ember#fact-vendor |
| Released | Nov 9, 2026 | https://research.meta.ai/blog/muse-ember | vendor-reported, confirmed | https://theagenticweekly.com/models/muse-ember#fact-release-date |
| API id | `muse-ember-1.0` | https://dev.meta.ai/docs/muse-ember | vendor-reported, confirmed | https://theagenticweekly.com/models/muse-ember#fact-api-id |
| Context window | 1,048,576 tokens (1.05M) | https://dev.meta.ai/docs/muse-ember | vendor-reported, confirmed | https://theagenticweekly.com/models/muse-ember#fact-context-tokens |
| Input | text, image, video, audio, pdf | https://dev.meta.ai/docs/muse-ember | vendor-reported, confirmed | https://theagenticweekly.com/models/muse-ember#fact-input-modalities |
| Output | text | https://dev.meta.ai/docs/muse-ember | vendor-reported, confirmed | https://theagenticweekly.com/models/muse-ember#fact-output-modalities |
| Licence | Proprietary (API). Hosted on the Meta Model API and in Muse Code; no weights. | https://dev.meta.ai/docs/muse-ember | vendor-reported, confirmed | https://theagenticweekly.com/models/muse-ember#fact-license |
| Pricing | $0.1 in / $0.5 out per 1M tokens. Standard mode only; requests over 200K input tokens are billed at higher long-context rates. | https://research.meta.ai/blog/muse-ember | vendor-reported, confirmed | https://theagenticweekly.com/models/muse-ember#fact-pricing |

## Vendor claims and neutral signals

- Meta says Muse Ember matches Claude Haiku 5.5's best Artificial Analysis score at about a third of the cost.

## Notes

- Max output is 524,288 tokens per Meta's docs. Benchmarks are Meta's own reporting.

## What we tested

Nothing yet. We have not run Muse Ember ourselves, so every fact here is Reported from the sources below.

## Not verified, left out

- Parameter count is not published.
- Long-context (over 200K input tokens) prices were not captured.

## Alternatives to Muse Ember

Models from other vendors that share at least one of our groups, from each model's sourced facts (not tested by us).

- [GPT-6.1 Terra](https://theagenticweekly.com/models/gpt-6-1-terra) (OpenAI): Both in: Agents, Small and fast · $1 in / $5 out per 1M tokens · 1.05M context · released Oct 26, 2026
- [Mercury 3](https://theagenticweekly.com/models/mercury-3) (Inception): Both in: Small and fast, Agents · $0.1 in / $0.35 out per 1M tokens (launch promo, end date not stated; list $0.2 / $0.7) · 1M context · released Oct 19, 2026
- [MiniMax M3.1 Flash](https://theagenticweekly.com/models/minimax-m3-1-flash) (MiniMax): Both in: Agents, Small and fast · $0.15 in / $0.6 out per 1M tokens · 1M context · released Oct 19, 2026
- [Claude Haiku 5.5](https://theagenticweekly.com/models/claude-haiku-5-5) (Anthropic): Both in: Small and fast, Agents · $0.1 in / $0.5 out per 1M tokens · 1M context · released Oct 7, 2026
- [Gemini 3.5 Flash-Lite](https://theagenticweekly.com/models/gemini-3-5-flash-lite) (Google): Both in: Small and fast, Agents · 1.05M context · released Jul 21, 2026
- [Gemini 3.6 Flash](https://theagenticweekly.com/models/gemini-3-6-flash) (Google): Both in: Agents, Small and fast · 1.05M context · released Jul 21, 2026
- [Best AI model for agents (Nov 2026): Claude Opus 5.5 leads Terminal-Bench 4.0](https://theagenticweekly.com/best/ai-model-for-agents)
- [Longest context window LLMs](https://theagenticweekly.com/best/long-context-llms)

## Muse Ember FAQ

**When was Muse Ember released?**

Meta released Muse Ember on Nov 9, 2026. Source: https://research.meta.ai/blog/muse-ember

**How much does Muse Ember cost?**

The listed API price is $0.1 in / $0.5 out per 1M tokens. Prices change; the source shows the current figure. Source: https://research.meta.ai/blog/muse-ember

**How large is the Muse Ember context window?**

1,048,576 tokens. Source: https://dev.meta.ai/docs/muse-ember

**Is Muse Ember open weights?**

No. The weights are not published; the licence is listed as Proprietary (API). Source: https://dev.meta.ai/docs/muse-ember

**What is the API model id for Muse Ember?**

muse-ember-1.0. Source: https://dev.meta.ai/docs/muse-ember

**Has Agentic Weekly tested Muse Ember?**

Not yet. Every fact on this page is Reported: read from the linked vendor pages, not measured by us.

## Sources

- [Meta: Introducing Muse Ember](https://research.meta.ai/blog/muse-ember)
- [Meta Model API docs: Muse Ember](https://dev.meta.ai/docs/muse-ember)
- [Agentic Weekly brief](https://theagenticweekly.com/news/meta-muse-ember)

Data licence: CC BY 4.0. Data: Agentic Weekly (https://theagenticweekly.com), CC BY 4.0.