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ModelCap

Head-to-head comparison

Muse Spark 1.3 vs GLM 5.3 Flash

Muse Spark 1.3 (Meta) and GLM 5.3 Flash (Z.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 9 September 2026

As of 9 September 2026, Muse Spark 1.3 holds the stronger ModelCap Index position (#2 vs #11); GLM 5.3 Flash is 17× cheaper per output token ($0.25/1M vs $4.25/1M); GLM 5.3 Flash offers the longer context window (1.3M vs 1M tokens); and GLM 5.3 Flash ships open weights.

Which should you choose?

Choose Muse Spark 1.3 if…

  • you want the stronger overall ModelCap Index position — #2 against #11 (88.7 vs 78.7 points).
  • AA Intelligence Index is your yardstick — 48.2 against 41.9.
  • AA Humanity's Last Exam is your yardstick — 48.7% against 39.9%.
  • you want the more recently listed model — Muse Spark 1.3 was listed 2 September 2026, GLM 5.3 Flash 26 August 2026.

Choose GLM 5.3 Flash if…

  • API cost matters — $0.25/1M output tokens against $4.25/1M, about 17× cheaper.
  • your workload is prompt-heavy — input tokens cost $0.075/1M against $1.25/1M.
  • you need the longer context window — 1.3M tokens against 1M.
  • you want to self-host: GLM 5.3 Flash ships open weights while Muse Spark 1.3 is api only.
  • you want provider choice — 26 listed API providers against 1.

Muse Spark 1.3 vs GLM 5.3 Flash: specs, pricing and context

Specification comparison of Muse Spark 1.3 and GLM 5.3 Flash
FieldMuse Spark 1.3MetaGLM 5.3 FlashZ.ai
ModelCap Index position#2#11
Index score88.778.7
EvidenceMeasuredMeasured
Input price / 1M tokens$1.25$0.075
Output price / 1M tokens$4.25$0.25
Context window1M tokens1.3M tokens
Max output tokens944K131K
API providers listed126
Weight accessAPI onlyOpen weights
Input modalitiesText, Image, Video, File, AudioText, Image, Video
First listed2 September 202626 August 2026
PublisherMetaZ.ai

Evidence: 1 public benchmark observation across 1 board · 4 public benchmark observations across 4 boards. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: Muse Spark 1.3 vs GLM 5.3 Flash

Public benchmark boards where Muse Spark 1.3 or GLM 5.3 Flash has a published result
BoardMuse Spark 1.3GLM 5.3 FlashLeads
Arena codingArena (LMArena)—15341517–1551Only one result
LMArena AgentLMArena—2.0%1.1%–2.9%Only one result
AA Intelligence IndexArtificial Analysis48.2intelligence-index:v4.3:max41.9intelligence-index:v4.3:reasoning-unspecifiedMuse Spark 1.3
AA Terminal-Bench 2.1Artificial Analysis84.3%terminal-bench:2.1:terminus-2:e2b:pass-at-1:3-repeats:source-model="Muse Spark 1.3 (max)":reasoning=true84.3%terminal-bench:2.1:terminus-2:e2b:pass-at-1:3-repeats:source-model="GLM-5.3-Flash":reasoning=trueTied
AA Humanity's Last ExamArtificial Analysis48.7%hle:may-2025:text-only-2158:no-tools:pass-at-1:source-model="Muse Spark 1.3 (max)":reasoning=true39.9%hle:may-2025:text-only-2158:no-tools:pass-at-1:source-model="GLM-5.3-Flash":reasoning=trueMuse Spark 1.3

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 GLM 5.3 Flash: common questions

Is Muse Spark 1.3 better than GLM 5.3 Flash?

Muse Spark 1.3 ranks higher on the ModelCap Index as of 9 September 2026: #2 against #11. 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. Their published uncertainty intervals overlap, so the rank difference alone does not establish a reliable capability advantage for your workload.

Is Muse Spark 1.3 cheaper than GLM 5.3 Flash?

GLM 5.3 Flash is cheaper on output tokens: $0.25/1M against $4.25/1M. Input tokens are $1.25/1M for Muse Spark 1.3 and $0.075/1M for GLM 5.3 Flash. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens. For 1,000 requests with 2,000 input and 500 output tokens each (2M input + 0.5M output), the listed-rate estimate is $4.63 for Muse Spark 1.3 versus $0.28 for GLM 5.3 Flash. GLM 5.3 Flash costs 94.1% less in this scenario. This excludes caching, batch discounts, prompt-length tiers, tool charges and retries; verify the selected endpoint before budgeting.

Which has the bigger context window, Muse Spark 1.3 or GLM 5.3 Flash?

GLM 5.3 Flash has the larger context window: 1.3M tokens against 1M.

Which is better for coding, Muse Spark 1.3 or GLM 5.3 Flash?

AA Terminal-Bench 2.1: Muse Spark 1.3 84.3%, GLM 5.3 Flash 84.3% — tied.

Are Muse Spark 1.3 and GLM 5.3 Flash open-weight models?

Muse Spark 1.3: API only. GLM 5.3 Flash: Open weights. 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 GLM 5.3 Flash?

ModelCap currently lists 1 API provider for Muse Spark 1.3 and 26 for GLM 5.3 Flash, 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 GLM 5.3 Flash comparison?

Every figure comes from the sealed ModelCap dataset published 9 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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