Meta · llm model

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.

Reported Last verified Nov 9, 2026 · All models · JSON · Markdown

Primary source: https://research.meta.ai/blog/muse-ember. We are the fast, independent index; the vendor’s own page is the source of record for these model facts.

Muse Ember at a glance: API id muse-ember-1.0; 1,048,576-token context window; takes text, image, video, audio, pdf in; returns text; listed price $0.1 in / $0.5 out per 1M tokens.

ReleasedNov 9, 2026
Context window1.05M1,048,576 tokens
LicenceProprietaryProprietary (API)

InTextImageVideoAudioPDFOutText

Key facts

Vendor-reported facts are read from the linked vendor page on the date shown above; we did not run the model. Independently tested means we ran it; no fact on this page is. Editorial is our own classification, not a vendor claim. Where a linked page does not itself state a value, the row says so. How to read provenance.

Muse Ember: key facts with sources
Fact	Value	Label	Source
Vendor	Meta	Editorial	n/a
Released	Nov 9, 2026	Vendor-reported	source
Status	generally available	Editorial	n/a
API id	muse-ember-1.0	Vendor-reported	source
Context window	1,048,576 tokens (1.05M)	Vendor-reported	source
Input	text, image, video, audio, pdf	Vendor-reported	source
Output	text	Vendor-reported	source
Licence	Proprietary (API) Hosted on the Meta Model API and in Muse Code; no weights.	Vendor-reported	source
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. Prices: research.meta.ai/blog/muse-ember · Checked Nov 9, 2026	Vendor-reported	source

Where Muse Ember sits in our data

Released Nov 9, 2026 (week 46 of 2026), in November 2026. Other models in our data released that month: Claude Fable 5.2, Ampersand v0.1, Arete-27B, Gemini Omni 1.2 Flash.
The previous Meta model we track is Muse Spark Open (Oct 15, 2026), 25 days earlier.
Of the 73 models in our data with a published context window, Muse Ember has the number 12 largest (1.05M tokens). Our data is not every model on the market.
All releases by date: AI model releases by month · new AI models this week. Choosing for code: best LLM for coding. Price and rank context: LLM pricing comparison · cheapest LLM API · OpenRouter pricing · best AI model right now.

Alternatives to Muse Ember

Language models from other vendors that share at least one of our groups with Muse Ember. Comparable on paper, from each model’s sourced facts; we have not run them.

GPT-6.1 TerraOpenAI · Both in: Agents, Small and fast · $1 in / $5 out per 1M tokens · 1.05M context · released Oct 26, 2026
Mercury 3Inception · 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 FlashMiniMax · Both in: Agents, Small and fast · $0.15 in / $0.6 out per 1M tokens · 1M context · released Oct 19, 2026
Claude Haiku 5.5Anthropic · 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-LiteGoogle · Both in: Small and fast, Agents · 1.05M context · released Jul 21, 2026
Gemini 3.6 FlashGoogle · Both in: Agents, Small and fast · 1.05M context · released Jul 21, 2026

Side by side: Best AI model for agents (Nov 2026): Claude Opus 5.5 leads Terminal-Bench 4.0 · Longest context window LLMs

How Muse Ember differs from Muse Spark Open

Read from the recorded facts of the two models, not from a head-to-head test. We have not run either.

We have a recorded price for Muse Ember but none for Muse Spark Open.
Context window is 1.05M tokens against 1M for Muse Spark Open.
Input is text, image, video, audio, pdf, against text, image, video, audio for Muse Spark Open.
Muse Ember came out 25 days after Muse Spark Open.
Facts for the other model: Muse Spark Open.

What the sources say

These are claims from the linked pages, not our measurements.

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 on this page is Reported from the sources below. When we do test it, the scope will be stated here and in our test logs. See methodology.

Not verified, left out

We could not confirm these on a vendor page, so we do not state them.

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

Muse Ember FAQ

When was Muse Ember released?

Meta released Muse Ember on Nov 9, 2026. Source.

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.

How large is the Muse Ember context window?

1,048,576 tokens. Source.

Is Muse Ember open weights?

No. The weights are not published; the licence is listed as Proprietary (API). Source.

What is the API model id for Muse Ember?

muse-ember-1.0. Source.

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

Compare and guides

We have no head-to-head page or guide that names Muse Ember yet. These hubs cover the models we do compare.

All model comparisons · All guides · Model releases by month

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