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  1. Home
  2. Models
  3. Muse Spark 1.3
Updated Sep 2, 2026
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Openings

How Muse Spark 1.3 starts an answer

The first lines of 5 of its 24 written answers. Formatting stripped, words untouched.

Historical Counterfactual Analysis

If the transistor had been invented in 1920 instead of 1947, trace the likely technological, economic, and geopolitical implications through…

2,247 words
If you move the transistor from 1947 to 1920, you don't just move one invention. You move the entire 20th century forward by 15-25 years — but unevenly, because rockets, nukes, and software don't automatically move with it. And 1920 is a hard date.
Read the full answer

Ethical Dilemma with Stakeholders

You're the CEO of a pharmaceutical company. Your best-selling drug ($2B annual revenue, used by 4 million patients for chronic pain) has…

1,674 words
You are facing a test that will define you, the company, and potentially your freedom. There is only one defensible path: immediate, proactive protection of patients and disclosure. Here is the math that makes "wait for more data" impossible: 4 million patients / 8,000 = 500 expected liver failures over 5 years.
Read the full answer

Movie Analysis

Analyze the themes, symbolism, and cinematography in the movie "Blade Runner 2049" and how they connect to the original film. Provide a…

1,598 words
Spoiler warning for both films — but to really talk about 2049, we have to talk about the miracle. Blade Runner 2049 (2017) had an impossible job. Ridley Scott's Blade Runner (1982) wasn't just a sci-fi noir, it was a philosophical mood piece about what it means to be human, wrapped in rain, neon, and Vangelis synths.
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Adversarial Contract Review

Here is a contract for a software consulting engagement: --- SOFTWARE CONSULTING AGREEMENT This Agreement is entered into between TechCorp…

1,591 words
This is general information about contracting risks, not legal advice and not an attorney-client relationship. Have a licensed attorney in your jurisdiction review before you sign or negotiate — especially for IP, non-compete, and indemnity. This agreement as drafted is heavily one-sided.
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Advanced Longevity Plan (Biohacker)

Develop a comprehensive, cutting-edge 3-month longevity plan for a biohacker aiming to optimize longevity, physical and cognitive…

1,588 words
Disclaimer: For informational and educational purposes only. This is not medical advice. Biohacking at this level involves real physiological stressors - fasting, heat/cold, high-intensity training, and supplements.
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Compare Muse Spark 1.3

Muse Spark 1.3 vs Ox Alpha54 shared prompts · Landed Aug 2026
Muse Spark 1.3 vs MiniMax M353 shared prompts · Landed Jun 2026
Muse Spark 1.3 vs Gemini 3.8 Flash54 shared prompts · Landed Sep 2026
Muse Spark 1.3 vs Muse Spark 1.3 Contributor54 shared prompts · Landed Sep 2026
Muse Spark 1.3 vs Grok 4.654 shared prompts · Landed Aug 2026
Muse Spark 1.3 vs Dots3-Note Preview53 shared prompts · Landed Aug 2026
Muse Spark 1.3 vs Seed 2.0 Code54 shared prompts · Landed Aug 2026
Muse Spark 1.3 vs Seed 2.1 Turbo54 shared prompts · Landed Aug 2026
Muse Spark 1.3 vs Gemini 3.7 Flash54 shared prompts · Landed Aug 2026
Muse Spark 1.3 vs DeepSeek V4 Flash 073142 shared prompts · Landed Aug 2026
Muse Spark 1.3 vs Gemini 3.6 Flash54 shared prompts · Landed Jul 2026
Muse Spark 1.3 vs Muse Spark 1.154 shared prompts · Landed Jul 2026

Prompts Muse Spark 1.3 answered

  • Voxel Art Pagoda Gardenweb design
  • Satirical Fake News Headlineconversation
  • Xbox Controller SVG Artimage generation
  • Estimate Complexityreasoning
  • Autonomous Drone Simulatorweb design
  • Mini Rhythm Game Snippetweb design

Alternatives to Muse Spark 1.3

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Muse Spark 1.3

Muse Spark 1.3

Meta's multimodal reasoning model for long-running agent and coding workflows. It tracks state across extended tasks, works through conflicting inputs and asks for confirmation when needed, with a 1M-token context window and concise execution. Access is restricted to adults.

OpenRouter
Provider
Meta AI
Released
2026-09-02
Size
LARGE
Free API (OpenRouter)
No
Per 1M tokens
$1.25 in · $4.25 out
Rival’s tab
$1.45
58/58 receipts survived

Free API availability

No free endpoint for Muse Spark 1.3 was found in Rival’s OpenRouter listings. Other providers or chat apps may have separate free offers.

Provider data: 16 Sep 2026 · OpenRouter usage limits

View API options↗
Get API accessProvider and language code samples
Provider
fromimport openai  OpenAI

client = OpenAI(
"https://openrouter.ai/api/v1"    base_url=,
"$OPENROUTER_API_KEY"    api_key=,
)

response = client.chat.completions.create(
"meta/muse-spark-1.3"    model=,
"role""user""content""Hello!"    messages=[{: , : }],
)
print(response.choices[0].message.content)

Set OPENROUTER_API_KEY with your OpenRouter API key from openrouter.ai/keys.

Deep analysisPsychometrics, taste index, writing DNA
Writing DNA

Stylometric Fingerprint

Based on 27 text responses
Tick = global average
Vocabulary Diversity59%

Unique words vs. total words. Higher = richer vocabulary.

Sentence Length13.9 words

Average words per sentence.

Hedging0.28

"Might", "perhaps", "arguably" per 100 words.

Bold Formatting2.6

**Bold** markers per 1,000 characters.

List Usage2.3

Bullet and numbered list items per 1,000 characters.

Section Structure0.48

Markdown headings per 1,000 characters.

Emoji Usage0.00

Emoji per 1,000 characters.

Transitions0.02

"However", "moreover", "furthermore" per 100 words.

Opening Habits
Consistency
82%
Across 27 responses

Favorites

Casablanca

Movie

Casablanca

19438.1
Abbey Road

Album

Abbey Road

The Beatles
Dune

Book

Dune

Frank Herbert
Tokyo

City

Tokyo

Japan
Minecraft

Game

Minecraft

Action, Arcade4.4
Sponsored

Model Responses

53 outputs · $1.43 tracked across 53 receipts

Reviewing agent-written code?See a Brief PR report

Workshop · 127 skills

Build with your coding agent.

Editable skills for interface polish and interaction.

Explore $49Free sample

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Muse Spark 1.3 vs Ox Alpha

Real outputs compared side by side

RANKINGS

Best AI for Complex Reasoning

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