Skip to content
ModelCap

Head-to-head comparison

Muse Spark Open vs GLM 5.3

Muse Spark Open (Meta) and GLM 5.3 (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 15 October 2026

As of 15 October 2026, Muse Spark Open holds the stronger ModelCap Index position (#15 vs #20); and Muse Spark Open is cheaper per output token ($4.25/1M vs $4.80/1M).

Which should you choose?

Choose Muse Spark Open if…

  • you want the stronger overall ModelCap Index position — #15 against #20 (79.6 vs 78.4 points).
  • API cost matters — $4.25/1M output tokens against $4.80/1M.
  • AA Humanity's Last Exam is your yardstick — 43.9% against 42.3%.
  • you want the more recently listed model — Muse Spark Open was listed 15 October 2026, GLM 5.3 18 August 2026.

Choose GLM 5.3 if…

  • your workload is prompt-heavy — input tokens cost $0.11/1M against $1.25/1M.
  • you want provider choice — 34 listed API providers against 4.
  • AA Intelligence Index is your yardstick — 44.8 against 38.9.
  • AA Terminal-Bench 2.1 is your yardstick — 83.9% against 76.4%.

Muse Spark Open vs GLM 5.3: specs, pricing and context

Specification comparison of Muse Spark Open and GLM 5.3
FieldMuse Spark OpenMetaGLM 5.3Z.ai
ModelCap Index position#15#20
Index score79.678.4
EvidenceEstimatedMeasured
Input price / 1M tokens$1.25$0.11
Output price / 1M tokens$4.25$4.80
Context window1M tokens1M tokens
Declared route output cap944K944K
API providers listed434
Weight accessGated accessRestricted license
Input modalitiesText, Image, Video, File, AudioText
First listed15 October 202618 August 2026
PublisherMetaZ.ai

Evidence: publisher-corpus-prior over 213 held-out anchors (22%); launch card against 5 resolved peers on 11 rows (78%); exceeds every named peer on 3 of 11 rows; optimism haircut 0 from cross-lab-probe; shrunk 1 up toward the measured corpus · 3 public benchmark observations across 3 boards. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: Muse Spark Open vs GLM 5.3

Public benchmark boards where Muse Spark Open or GLM 5.3 has a published result
BoardMuse Spark OpenGLM 5.3Leads
Arena textArena (LMArena)—14791473–1484MaxOnly one result
Arena codingArena (LMArena)—15201511–1529MaxOnly one result
LMArena AgentLMArena—2.0%1.2%–2.8%MaxOnly one result
AA Intelligence IndexArtificial Analysis38.9X-High44.8MaxGLM 5.3
AA Terminal-Bench 2.1Artificial Analysis76.4%X-High83.9%MaxGLM 5.3
AA Humanity's Last ExamArtificial Analysis43.9%X-High42.3%MaxMuse Spark Open
Terminal-Bench 4.0Terminal-Bench (Laude Institute)—41.8%38.6%–45.1%Claude Code · MaxOnly 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 Open vs GLM 5.3: common questions

Is Muse Spark Open better than GLM 5.3?

Muse Spark Open ranks higher on the ModelCap Index as of 15 October 2026: #15 against #20. 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 Open cheaper than GLM 5.3?

Muse Spark Open is cheaper on output tokens: $4.25/1M against $4.80/1M. Input tokens are $1.25/1M for Muse Spark Open and $0.11/1M for GLM 5.3. 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 Open versus $2.62 for GLM 5.3. GLM 5.3 costs 43.4% 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 Open or GLM 5.3?

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 Open or GLM 5.3?

AA Terminal-Bench 2.1: Muse Spark Open 76.4%, GLM 5.3 83.9% — GLM 5.3 leads.

Are Muse Spark Open and GLM 5.3 open-weight models?

Muse Spark Open: Gated access. GLM 5.3: Restricted license. 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 Open and GLM 5.3?

ModelCap currently lists 4 API providers for Muse Spark Open and 34 for GLM 5.3, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this Muse Spark Open vs GLM 5.3 comparison?

Every figure and ModelCap Index position comes from the same published snapshot dated 15 October 2026. Publication and page updates happen separately; use the snapshot date shown on the page.

Explore further