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Head-to-head comparison

Grok 4.20 Multi-Agent vs GLM 5.3

Grok 4.20 Multi-Agent (xAI) 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 2 October 2026

As of 2 October 2026, GLM 5.3 holds the stronger ModelCap Index position (#11 vs #13); Grok 4.20 Multi-Agent is 1.8× cheaper per output token ($2.50/1M vs $4.40/1M); and Grok 4.20 Multi-Agent offers the longer context window (2M vs 1M tokens).

Which should you choose?

Choose Grok 4.20 Multi-Agent if…

  • API cost matters — $2.50/1M output tokens against $4.40/1M, about 1.8× cheaper.
  • your workload is prompt-heavy — input tokens cost $1.25/1M against $1.40/1M.
  • you need the longer context window — 2M tokens against 1M.

Choose GLM 5.3 if…

  • you want the stronger overall ModelCap Index position — #11 against #13 (80.0 vs 79.1 points).
  • you want provider choice — 32 listed API providers against 1.
  • Arena text is your yardstick — 1479 against 1471.
  • Arena coding is your yardstick — 1521 against 1509.
  • you want the more recently listed model — GLM 5.3 was listed 18 August 2026, Grok 4.20 Multi-Agent 31 March 2026.

Grok 4.20 Multi-Agent vs GLM 5.3: specs, pricing and context

Specification comparison of Grok 4.20 Multi-Agent and GLM 5.3
FieldGrok 4.20 Multi-AgentxAIGLM 5.3Z.ai
ModelCap Index position#13#11
Index score79.180.0
EvidenceMeasuredMeasured
Input price / 1M tokens$1.25$1.40
Output price / 1M tokens$2.50$4.40
Context window2M tokens1M tokens
Declared route output cap1.8M131K
API providers listed132
Weight accessNo linked weightsRestricted license
Input modalitiesText, Image, FileText
First listed31 March 202618 August 2026
PublisherxAIZ.ai

Evidence: 2 public benchmark observations across 2 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: Grok 4.20 Multi-Agent vs GLM 5.3

Public benchmark boards where Grok 4.20 Multi-Agent or GLM 5.3 has a published result
BoardGrok 4.20 Multi-AgentGLM 5.3Leads
Arena textArena (LMArena)14711467–1474Beta · 030914791474–1485MaxGLM 5.3
Arena codingArena (LMArena)15091503–1514Beta · 030915211512–1531MaxGLM 5.3
LMArena AgentLMArena—2.6%1.9%–3.3%MaxOnly one result
AA Intelligence IndexArtificial Analysis—44.8MaxOnly one result
AA Terminal-Bench 2.1Artificial Analysis—83.9%MaxOnly one result
AA Humanity's Last ExamArtificial Analysis—42.3%MaxOnly one result
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.

Grok 4.20 Multi-Agent vs GLM 5.3: common questions

Is Grok 4.20 Multi-Agent better than GLM 5.3?

GLM 5.3 ranks higher on the ModelCap Index as of 2 October 2026: #11 against #13. 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 Grok 4.20 Multi-Agent cheaper than GLM 5.3?

Grok 4.20 Multi-Agent is cheaper on output tokens: $2.50/1M against $4.40/1M. Input tokens are $1.25/1M for Grok 4.20 Multi-Agent and $1.40/1M 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 $3.75 for Grok 4.20 Multi-Agent versus $5.00 for GLM 5.3. Grok 4.20 Multi-Agent costs 25.0% 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, Grok 4.20 Multi-Agent or GLM 5.3?

Grok 4.20 Multi-Agent has the larger context window: 2M tokens against 1M. 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, Grok 4.20 Multi-Agent or GLM 5.3?

Arena coding: Grok 4.20 Multi-Agent 1509, GLM 5.3 1521 — GLM 5.3 leads.

Are Grok 4.20 Multi-Agent and GLM 5.3 open-weight models?

Grok 4.20 Multi-Agent: No linked weights. 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 Grok 4.20 Multi-Agent and GLM 5.3?

ModelCap currently lists 1 API provider for Grok 4.20 Multi-Agent and 32 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 Grok 4.20 Multi-Agent vs GLM 5.3 comparison?

Every figure and ModelCap Index position comes from the same published snapshot dated 2 October 2026. Publication and page updates happen separately; use the snapshot date shown on the page.

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