All tasks / Comparisons

Kimi K3 vs Muse Spark 1.3

Compared only on public benchmark results, across the 6 tasks where both are listed: Muse Spark 1.3 is a tier higher in 1 of 6 shared tasks, they share a tier in 5.

Kimi K3

Moonshot AI's open-weights Kimi MoE line; Kimi K3 has 2.8T total and 104B activated parameters and 1M context.

Vendor: Moonshot AI
Weights: Open: run it yourself
Released: Jul 2026
API price: $3 in / $15 out per 1M tokens
GPU memory to run locally: ~1600 GB
License: Kimi K3 License
Last verified: 18 Oct 2026

Alternatives to Kimi K3

Muse Spark 1.3

Meta's mid-tier proprietary Muse model line, offered through Meta's API.

Vendor: Meta
Weights: Closed: API and apps only
Released: Sep 2026
API price: $1.25 in / $4.25 out per 1M tokens
License: proprietary
Last verified: 18 Oct 2026

Alternatives to Muse Spark 1.3

Task by task

Task	Kimi K3	Muse Spark 1.3	Higher tier
Chat & assistants Models	S1,487 on LMArena Text Arena (overall, style control) · Local	S1,494 on LMArena Text Arena (overall, style control) · Cloud	Same tier
Writing Models	A1,461 on LMArena Text Arena: Creative Writing (style control) · Local	A1,461 on LMArena Text Arena: Creative Writing (style control) · Cloud	Same tier
Coding Models	B1,655 on LMArena WebDev / Code Arena (overall) · Local	B1,659 on LMArena WebDev / Code Arena (overall) · Cloud	Same tier
Image understanding Models	A80.5% on Artificial Analysis MMMU-Pro (independent evaluation) · Local	S1,290 on LMArena Vision Arena (overall, style control) · Cloud	Muse Spark 1.3
Vector graphics & logos Models	C1,300 on Design Arena SVG · Local	C1,323 on Design Arena SVG · Cloud	Same tier
Slides & presentations Models	A1,273 on Design Arena Python-PPTX Slides · Local	A1,244 on Design Arena Python-PPTX Slides · Cloud	Same tier

A tier spans a range of scores, and small gaps on a leaderboard are often within its margin of error, so only a different tier counts as ahead. How we rank.

Same benchmark, both results

Benchmark	Kimi K3	Muse Spark 1.3	Snapshot
Artificial Analysis Intelligence Index Composite index over Artificial Analysis' own evaluation suite, higher is better	44 Kimi K3 (Max)	48 Muse Spark 1.3 (Max)	18 Oct 2026
Artificial Analysis MMMU-Pro (independent evaluation) Accuracy on MMMU-Pro (multi-discipline multimodal questions over images), as run by Artificial Analysis, higher is better	80.5% Kimi K3 (Max)	82% Muse Spark 1.3 (Xhigh)	19 Oct 2026
Design Arena Python-PPTX Slides Elo rating from crowdsourced blind pairwise votes on PowerPoint decks that models build with python-pptx in Design Arena's agent harness, higher is better	1,273 Kimi K3	1,244 Muse Spark 1.3 (xhigh)	18 Oct 2026
Design Arena SVG Elo rating from crowdsourced blind pairwise votes on SVG markup that models generate from a prompt (icons, illustrations, diagrams, artistic compositions), higher is better	1,300 Kimi K3	1,323 Muse Spark 1.3 Max	19 Oct 2026
EQ-Bench Creative Writing v3 Elo score from LLM-judged pairwise comparisons of creative-writing outputs (rubric score shown alongside), higher is better	2,082 kimi-k3	1,906 muse-spark-1.3	24 Sep 2026
LMArena Text Arena (overall, style control) Arena score (Bradley-Terry rating from pairwise human votes, style-controlled default view), higher is better	1,487 Kimi K3 (Max)	1,494 Muse Spark 1.3 (Max)	15 Oct 2026
LMArena Text Arena: Creative Writing (style control) Arena score (Bradley-Terry rating from pairwise human votes, creative-writing prompts only, style-controlled view), higher is better	1,461 Kimi K3 (Max)	1,461 Muse Spark 1.3 (Max)	15 Oct 2026
LMArena WebDev / Code Arena (overall) Arena score (Bradley-Terry rating from pairwise human votes on web-app generation), higher is better	1,655 Kimi K3 (Max)	1,659 Muse Spark 1.3 (Max)	18 Oct 2026