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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 24 October 2026

As of 24 October 2026, Muse Spark 1.3 holds the stronger ModelCap Index position (#5 vs #24); GLM 5.3 Flash is 8.5× cheaper per output token ($0.50/1M vs $4.25/1M); 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 — #5 against #24 (83.7 vs 77.3 points).
  • Arena text is your yardstick — 1496 against 1476.
  • Arena coding is your yardstick — 1536 against 1525.
  • LMArena Agent is your yardstick — 3.1% against -1.8%.
  • 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 — $0.50/1M output tokens against $4.25/1M, about 8.5× cheaper.
  • your workload is prompt-heavy — input tokens cost $0.15/1M against $1.25/1M.
  • you want to self-host: GLM 5.3 Flash ships open weights while Muse Spark 1.3 is no linked weights.
  • you want provider choice — 34 listed API providers against 1.
  • Terminal-Bench 4.0 is your yardstick — 35.8% against 14.6%.

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#5#24
Index score83.777.3
EvidenceMeasuredMeasured
Input price / 1M tokens$1.25$0.15
Output price / 1M tokens$4.25$0.50
Context window1M tokens1M tokens
Declared route output cap944K944K
API providers listed134
Weight accessNo linked weightsOpen weights
Input modalitiesText, Image, Video, FileText, Image, Video
First listed2 September 202626 August 2026
PublisherMetaZ.ai

Evidence: 3 public benchmark observations across 3 boards · 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 textArena (LMArena)14961490–1501Max14761471–1481Not reportedMuse Spark 1.3
Arena codingArena (LMArena)15361527–1545Max15251518–1532Muse Spark 1.3
LMArena AgentLMArena3.1%2.2%–3.9%Max-1.8%-2.4%–-1.1%Muse Spark 1.3
ARC-AGI-2ARC Prize Foundation—65.8%MaxOnly one result
AA Intelligence IndexArtificial Analysis—41.8ReasoningOnly one result
AA Terminal-Bench 2.1Artificial Analysis—84.3%ReasoningOnly one result
AA Humanity's Last ExamArtificial Analysis—39.9%ReasoningOnly one result
Terminal-Bench 4.0Terminal-Bench (Laude Institute)14.6%11.6%–17.5%Muse Code · X-High35.8%32.2%–39.3%Claude Code · NoneGLM 5.3 Flash

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 24 October 2026: #5 against #24. 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: $0.50/1M against $4.25/1M. Input tokens are $1.25/1M for Muse Spark 1.3 and $0.15/1M 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 $0.55 for GLM 5.3 Flash. GLM 5.3 Flash costs 88.1% 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?

Both publish a 1M-token context window. OpenRouter catalogue or provider-endpoint declaration. Limits can vary by provider and prompt length; a model-wide maximum has not been independently verified.

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

Arena coding: Muse Spark 1.3 1536, GLM 5.3 Flash 1525 — Muse Spark 1.3 leads. Terminal-Bench 4.0: Muse Spark 1.3 14.6%, GLM 5.3 Flash 35.8% — GLM 5.3 Flash leads.

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

Muse Spark 1.3: No linked weights. GLM 5.3 Flash: Open weights. Open weights mean the checkpoint can be downloaded and self-hosted under its licence. A missing weight link does not identify every API or chat product that offers a model.

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 34 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 and ModelCap Index position comes from the same published snapshot dated 24 October 2026. Publication and page updates happen separately; use the snapshot date shown on the page.

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