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Head-to-head comparison

GPT-5.4 Nano vs GLM 5 Turbo

GPT-5.4 Nano (OpenAI) and GLM 5 Turbo (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 3 September 2026

As of 3 September 2026, GLM 5 Turbo holds the stronger ModelCap Index position (#44 vs #47); GPT-5.4 Nano is 3.2× cheaper per output token ($1.25/1M vs $4.00/1M); and GPT-5.4 Nano offers the longer context window (400K vs 203K tokens).

Which should you choose?

Choose GPT-5.4 Nano if…

  • API cost matters — $1.25/1M output tokens against $4.00/1M, about 3.2× cheaper.
  • your workload is prompt-heavy — input tokens cost $0.20/1M against $1.20/1M.
  • you need the longer context window — 400K tokens against 203K.
  • you want provider choice — 2 listed API providers against 1.
  • AA Intelligence Index is your yardstick — 39.7 against 39.1.
  • AA Humanity's Last Exam is your yardstick — 28.3% against 27.8%.
  • you want the more recently listed model — GPT-5.4 Nano was listed 17 March 2026, GLM 5 Turbo 15 March 2026.

Choose GLM 5 Turbo if…

  • you want the stronger overall ModelCap Index position — #44 against #47 (52.7 vs 51.7 points).
  • AA τ²-Bench Telecom is your yardstick — 98.5% against 76.0%.

GPT-5.4 Nano vs GLM 5 Turbo: specs, pricing and context

Specification comparison of GPT-5.4 Nano and GLM 5 Turbo
FieldGPT-5.4 NanoOpenAIGLM 5 TurboZ.ai
ModelCap Index position#47#44
Index score51.752.7
EvidenceMeasuredMeasured
Input price / 1M tokens$0.20$1.20
Output price / 1M tokens$1.25$4.00
Context window400K tokens203K tokens
Max output tokens128K131K
API providers listed21
Weight accessAPI onlyAPI only
Input modalitiesFile, Image, TextText
First listed17 March 202615 March 2026
PublisherOpenAIZ.ai

Evidence: 4 public benchmark observations across 4 boards · 2 public benchmark observations across 2 boards. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: GPT-5.4 Nano vs GLM 5 Turbo

Public benchmark boards where GPT-5.4 Nano or GLM 5 Turbo has a published result
BoardGPT-5.4 NanoGLM 5 TurboLeads
Arena codingArena (LMArena)14601454–1466High—Only one result
ARC-AGI-2ARC Prize Foundation5.7%X-High—Only one result
AA Intelligence IndexArtificial Analysis39.7intelligence-index39.1intelligence-indexGPT-5.4 Nano
AA Terminal-Bench 2.1Artificial Analysis60.7%terminal-bench-2.1—Only one result
AA τ²-Bench TelecomArtificial Analysis76.0%tau2-bench-telecom98.5%tau2-bench-telecomGLM 5 Turbo
AA Humanity's Last ExamArtificial Analysis28.3%humanitys-last-exam27.8%humanitys-last-examGPT-5.4 Nano
WildClawBench OpenClawWildClawBench—33.9Only 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.

GPT-5.4 Nano vs GLM 5 Turbo: common questions

Is GPT-5.4 Nano better than GLM 5 Turbo?

GLM 5 Turbo ranks higher on the ModelCap Index as of 3 September 2026: #44 against #47. 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 GPT-5.4 Nano cheaper than GLM 5 Turbo?

GPT-5.4 Nano is cheaper on output tokens: $1.25/1M against $4.00/1M. Input tokens are $0.20/1M for GPT-5.4 Nano and $1.20/1M for GLM 5 Turbo. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens.

Which has the bigger context window, GPT-5.4 Nano or GLM 5 Turbo?

GPT-5.4 Nano has the larger context window: 400K tokens against 203K.

Which is better for coding, GPT-5.4 Nano or GLM 5 Turbo?

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 GPT-5.4 Nano and GLM 5 Turbo open-weight models?

GPT-5.4 Nano: API only. GLM 5 Turbo: 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 GPT-5.4 Nano and GLM 5 Turbo?

ModelCap currently lists 2 API providers for GPT-5.4 Nano and 1 for GLM 5 Turbo, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this GPT-5.4 Nano vs GLM 5 Turbo comparison?

Every figure comes from the sealed ModelCap dataset published 3 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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