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Head-to-head comparison

Ornith 1.5 397B vs GLM 5.3

Ornith 1.5 397B (Ornith Ai) 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 20 August 2026

As of 20 August 2026, GLM 5.3 holds the stronger ModelCap Index position (#7 vs #12); and Ornith 1.5 397B ships open weights.

Which should you choose?

Choose Ornith 1.5 397B if…

  • you want to self-host: Ornith 1.5 397B ships open weights while GLM 5.3 is api only.

Choose GLM 5.3 if…

  • you want the stronger overall ModelCap Index position — #7 against #12 (78.4 vs 74.2 points).
  • you want provider choice — 1 listed API providers against 0.
  • you want the more recently listed model — GLM 5.3 was listed 18 August 2026, Ornith 1.5 397B 18 August 2026.

Ornith 1.5 397B vs GLM 5.3: specs, pricing and context

Specification comparison of Ornith 1.5 397B and GLM 5.3
FieldOrnith 1.5 397BOrnith AiGLM 5.3Z.ai
ModelCap Index position#12#7
Index score74.278.4
EvidenceEstimatedMeasured
Input price / 1M tokensUnlisted$1.40
Output price / 1M tokensUnlisted$4.40
Context window— tokens1M tokens
Max output tokens—131K
API providers listed01
Weight accessOpen weightsAPI only
Input modalitiesTextText
First listed18 August 202618 August 2026
PublisherOrnith AiZ.ai

Evidence: start rank interpolated from the launch card's own comparison table against resolved catalogue peers, discounted for measured cross-lab optimism · 1 public benchmark observation across 1 board. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: Ornith 1.5 397B vs GLM 5.3

Public benchmark boards where Ornith 1.5 397B or GLM 5.3 has a published result
BoardOrnith 1.5 397BGLM 5.3Leads
Artificial Analysis Intelligence IndexArtificial Analysis—59.5intelligence-indexOnly 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.

Ornith 1.5 397B vs GLM 5.3: common questions

Is Ornith 1.5 397B better than GLM 5.3?

GLM 5.3 ranks higher on the ModelCap Index as of 20 August 2026: #7 against #12. 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 Ornith 1.5 397B cheaper than GLM 5.3?

At least one of the two has no listed API price on ModelCap right now, so no price comparison is made.

Which has the bigger context window, Ornith 1.5 397B or GLM 5.3?

Both publish a —-token context window.

Which is better for coding, Ornith 1.5 397B or GLM 5.3?

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 Ornith 1.5 397B and GLM 5.3 open-weight models?

Ornith 1.5 397B: Open weights. GLM 5.3: API only. 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 Ornith 1.5 397B and GLM 5.3?

ModelCap currently lists 0 API providers for Ornith 1.5 397B and 1 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 Ornith 1.5 397B vs GLM 5.3 comparison?

Every figure comes from the sealed ModelCap dataset published 20 August 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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