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Muse Spark

Meta CLOSED Proprietary
Verdict

Muse Spark is a strong all-rounder: #31 of 406 by SIscope score. Strongest at chat quality, weaker at math.

SIscope score
84
#31 of 406
Human-vote rank
#27
of 419 · score 1474
Price per 1M tokens, blended
No price yet
Not listed on OpenRouter
Context window
No data yet
Speed: coming soon

Shape

Each spoke is a category, 0 at the centre, 100 at the edge.

CodingAgentsno data yetReasoningMathChatInstructions

Category scores

Percentiles: 90 means better than about 90% of tested models.

Coding87
Agents & toolsNo data yet–
Reasoning & knowledge87
Math78
Chat quality94
Following instructions86

What goes into each category · Compare with DeepSeek V4.1 Flash

Human-vote score over time

Text arena, recent updates.

147014751480Oct 15: 1474.1 (rank #26)Oct 20: 1474.1 (rank #26)Oct 22: 1474.2 (rank #26)Oct 28: 1474 (rank #27)Oct 15Oct 28

Independent test runs

Run by Epoch AI on the same harness for every model. Bars show the share of questions answered correctly.

GPQA Diamond90%
PhD-level science multiple choice questions
Better than 84% of 333 tested models. Run Apr 8, 2026.
OTIS Mock AIME 2024-2589%
Competition maths problems in the style of AIME
Better than 73% of 313 tested models. Run Apr 8, 2026.

Human-vote arenas

People compare two anonymous answers and pick the better one. Scores work like chess ratings.

ArenaRankScoreRange (95%)VotesUpdated
Text arena
Everyday chat, blind human votes
#27 of 41914741468–148014,140Oct 28, 2026
WebDev arena
Building web apps, blind human votes
Not on this board yet
Vision arena
Questions about images, blind human votes
#15 of 16713061297–13155,865Oct 19, 2026
Agent arena
Real multi-step agent sessions
Not on this board yet

Source: Arena (formerly LMArena) leaderboard dataset, CC BY 4.0. Fetched Nov 4, 2026.

Price

No public list price yet. We only show prices from the OpenRouter models API, and this model isn't listed there under a matching name.