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Head-to-head comparison

o3 vs GLM 5V Turbo

o3 (OpenAI) and GLM 5V 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 18 August 2026

As of 18 August 2026, GLM 5V Turbo holds the stronger ModelCap Index position (#29 vs #37); GLM 5V Turbo is 2× cheaper per output token ($4.00/1M vs $8.00/1M); and GLM 5V Turbo offers the longer context window (203K vs 200K tokens).

Which should you choose?

Choose o3 if…

  • ModelCap publishes no field on which o3 leads GLM 5V Turbo for this pair.

Choose GLM 5V Turbo if…

  • you want the stronger overall ModelCap Index position — #29 against #37 (60.1 vs 55.1 points).
  • API cost matters — $4.00/1M output tokens against $8.00/1M, about 2× cheaper.
  • your workload is prompt-heavy — input tokens cost $1.20/1M against $2.00/1M.
  • you need the longer context window — 203K tokens against 200K.
  • Arena coding is your yardstick — 1490 against 1460.
  • Artificial Analysis Intelligence Index is your yardstick — 35.3 against 31.1.
  • you want the more recently listed model — GLM 5V Turbo was listed 1 April 2026, o3 16 April 2025.

o3 vs GLM 5V Turbo: specs, pricing and context

Specification comparison of o3 and GLM 5V Turbo
Fieldo3OpenAIGLM 5V TurboZ.ai
ModelCap Index position#37#29
Index score55.160.1
EvidenceMeasuredMeasured
Input price / 1M tokens$2.00$1.20
Output price / 1M tokens$8.00$4.00
Context window200K tokens203K tokens
Max output tokens100K131K
API providers listed11
Weight accessAPI onlyAPI only
Input modalitiesImage, Text, FileImage, Text, Video
First listed16 April 20251 April 2026
PublisherOpenAIZ.ai

Evidence: 4 public benchmark observations across 4 boards · 3 public benchmark observations across 3 boards. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: o3 vs GLM 5V Turbo

Public benchmark boards where o3 or GLM 5V Turbo has a published result
Boardo3GLM 5V TurboLeads
Arena codingArena (LMArena)14601453–146614901478–1502GLM 5V Turbo
ARC-AGI-2ARC Prize Foundation6.5%High—Only one result
SWE-benchSWE-bench (Princeton / SWE-agent team)58.4%—Only one result
BFCL V4UC Berkeley (Gorilla)63.1Prompt—Only one result
Artificial Analysis Intelligence IndexArtificial Analysis31.1intelligence-index35.3intelligence-indexGLM 5V Turbo

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.

o3 vs GLM 5V Turbo: common questions

Is o3 better than GLM 5V Turbo?

GLM 5V Turbo ranks higher on the ModelCap Index as of 18 August 2026: #29 against #37. 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 o3 cheaper than GLM 5V Turbo?

GLM 5V Turbo is cheaper on output tokens: $4.00/1M against $8.00/1M. Input tokens are $2.00/1M for o3 and $1.20/1M for GLM 5V Turbo. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens.

Which has the bigger context window, o3 or GLM 5V Turbo?

GLM 5V Turbo has the larger context window: 203K tokens against 200K.

Which is better for coding, o3 or GLM 5V Turbo?

Arena coding: o3 1460, GLM 5V Turbo 1490 — GLM 5V Turbo leads.

Are o3 and GLM 5V Turbo open-weight models?

o3: API only. GLM 5V 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 o3 and GLM 5V Turbo?

ModelCap currently lists 1 API provider for o3 and 1 for GLM 5V Turbo, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this o3 vs GLM 5V Turbo comparison?

Every figure comes from the sealed ModelCap dataset published 18 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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