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Head-to-head comparison

Muse Spark 1.3 vs Kimi K3

Muse Spark 1.3 (Meta) and Kimi K3 (Moonshot AI) compared on the ModelCap Index, API price, context window, provider availability, weight access and every public benchmark board they share. Figures are the same ones shown on the live rankings; nothing here is a hidden score.

Snapshot as of 3 September 2026

As of 3 September 2026, Muse Spark 1.3 holds the stronger ModelCap Index position (#4 vs #6); and Muse Spark 1.3 is 3.5× cheaper per output token ($4.25/1M vs $15.00/1M).

Which should you choose?

Choose Muse Spark 1.3 if…

  • you want the stronger overall ModelCap Index position — #4 against #6 (81.7 vs 81.4 points).
  • API cost matters — $4.25/1M output tokens against $15.00/1M, about 3.5× cheaper.
  • your workload is prompt-heavy — input tokens cost $1.25/1M against $3.00/1M.
  • AA Intelligence Index is your yardstick — 62.1 against 59.7.
  • you want the more recently listed model — Muse Spark 1.3 was listed 2 September 2026, Kimi K3 16 July 2026.

Choose Kimi K3 if…

  • you want provider choice — 15 listed API providers against 1.

Muse Spark 1.3 vs Kimi K3: specs, pricing and context

Specification comparison of Muse Spark 1.3 and Kimi K3
FieldMuse Spark 1.3MetaKimi K3Moonshot AI
ModelCap Index position#4#6
Index score81.781.4
EvidenceMeasuredMeasured
Input price / 1M tokens$1.25$3.00
Output price / 1M tokens$4.25$15.00
Context window1M tokens1M tokens
Max output tokens944K944K
API providers listed115
Weight accessAPI onlyRestricted license
Input modalitiesText, Image, Video, File, AudioText, Image, Video
First listed2 September 202616 July 2026
PublisherMetaMoonshot AI

Evidence: 1 public benchmark observation across 1 board · 6 public benchmark observations across 6 boards. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: Muse Spark 1.3 vs Kimi K3

Public benchmark boards where Muse Spark 1.3 or Kimi K3 has a published result
BoardMuse Spark 1.3Kimi K3Leads
Arena codingArena (LMArena)—15421533–1551MaxOnly one result
LMArena AgentLMArena—8.7%8.1%–9.4%MaxOnly one result
ARC-AGI-2ARC Prize Foundation—60.4%MaxOnly one result
AA Intelligence IndexArtificial Analysis62.1intelligence-index59.7intelligence-indexMuse Spark 1.3
AA Terminal-Bench 2.1Artificial Analysis—85.0%terminal-bench-2.1Only one result
AA Humanity's Last ExamArtificial Analysis—46.9%humanitys-last-examOnly one result
WildClawBench OpenClawWildClawBench—54.5Only one result

Scores are the sources' own published figures for each model's best evaluated configuration; ModelCap never re-runs a benchmark.

Want a different pairing? Open the interactive comparison tool to swap either model for any current ranked language model.

Muse Spark 1.3 vs Kimi K3: common questions

Is Muse Spark 1.3 better than Kimi K3?

Muse Spark 1.3 ranks higher on the ModelCap Index as of 3 September 2026: #4 against #6. That is a capability ranking built from public benchmark evidence with published uncertainty; whether it is "better" for you also depends on price, context and where you can run it.

Is Muse Spark 1.3 cheaper than Kimi K3?

Muse Spark 1.3 is cheaper on output tokens: $4.25/1M against $15.00/1M. Input tokens are $1.25/1M for Muse Spark 1.3 and $3.00/1M for Kimi K3. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens.

Which has the bigger context window, Muse Spark 1.3 or Kimi K3?

Both publish a 1M-token context window.

Which is better for coding, Muse Spark 1.3 or Kimi K3?

The two models do not share a coding benchmark board on ModelCap yet, so no head-to-head coding score is published; the ModelCap Index position is the closest overall signal.

Are Muse Spark 1.3 and Kimi K3 open-weight models?

Muse Spark 1.3: API only. Kimi K3: Restricted license. Open weights mean the checkpoint can be downloaded and self-hosted under its licence; API-only models are available solely through hosted endpoints.

Where can I run Muse Spark 1.3 and Kimi K3?

ModelCap currently lists 1 API provider for Muse Spark 1.3 and 15 for Kimi K3, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this Muse Spark 1.3 vs Kimi K3 comparison?

Every figure comes from the sealed ModelCap dataset published 3 September 2026; the page re-renders within a minute of each data refresh, and the ModelCap Index positions are the same ones shown on the live rankings.

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