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GPT-5.4 Mini vs gpt oss safeguard 120b

GPT-5.4 Mini (OpenAI) and gpt oss safeguard 120b (OpenAI) 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 12 September 2026

As of 12 September 2026, GPT-5.4 Mini holds the stronger ModelCap Index position (#34 vs #143); and gpt oss safeguard 120b ships open weights.

Which should you choose?

Choose GPT-5.4 Mini if…

  • you want the stronger overall ModelCap Index position — #34 against #143 (66.1 vs 32.3 points).
  • you want provider choice — 2 listed API providers against 0.
  • you want the more recently listed model — GPT-5.4 Mini was listed 17 March 2026, gpt oss safeguard 120b 18 September 2025.

Choose gpt oss safeguard 120b if…

  • you want to self-host: gpt oss safeguard 120b ships open weights while GPT-5.4 Mini is api only.

GPT-5.4 Mini vs gpt oss safeguard 120b: specs, pricing and context

Specification comparison of GPT-5.4 Mini and gpt oss safeguard 120b
FieldGPT-5.4 MiniOpenAIgpt oss safeguard 120bOpenAI
ModelCap Index position#34#143
Index score66.132.3
EvidenceMeasuredInherited
Input price / 1M tokens$0.75Unlisted
Output price / 1M tokens$4.50Unlisted
Context window400K tokens— tokens
Max output tokens128K—
API providers listed20
Weight accessAPI onlyOpen weights
Input modalitiesFile, Image, TextText
First listed17 March 202618 September 2025
PublisherOpenAIOpenAI

Evidence: 4 public benchmark observations across 4 boards · finetune of openai/gpt-oss-120b · fp4 (100%). Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: GPT-5.4 Mini vs gpt oss safeguard 120b

Public benchmark boards where GPT-5.4 Mini or gpt oss safeguard 120b has a published result
BoardGPT-5.4 Minigpt oss safeguard 120bLeads
Arena codingArena (LMArena)14961490–1502High—Only one result
ARC-AGI-2ARC Prize Foundation18.9%X-High—Only one result
AA Intelligence IndexArtificial Analysis24.6intelligence-index:v4.3:xhigh—Only one result
AA Terminal-Bench 2.1Artificial Analysis59.2%terminal-bench:2.1:terminus-2:e2b:pass-at-1:3-repeats:source-model="GPT-5.4 mini (xhigh)":reasoning=true—Only one result
AA τ²-Bench TelecomArtificial Analysis83.3%tau2:telecom:dual-control:pass-at-1:3-repeats:source-model="GPT-5.4 mini (xhigh)":reasoning=true—Only one result
AA Humanity's Last ExamArtificial Analysis28.1%hle:may-2025:text-only-2158:no-tools:pass-at-1:source-model="GPT-5.4 mini (xhigh)":reasoning=true—Only 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 Mini vs gpt oss safeguard 120b: common questions

Is GPT-5.4 Mini better than gpt oss safeguard 120b?

GPT-5.4 Mini ranks higher on the ModelCap Index as of 12 September 2026: #34 against #143. 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 do not overlap, but the aggregate Index does not predict performance on every task; compare the relevant benchmark configurations before choosing.

Is GPT-5.4 Mini cheaper than gpt oss safeguard 120b?

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, GPT-5.4 Mini or gpt oss safeguard 120b?

Both publish a 400K-token context window.

Which is better for coding, GPT-5.4 Mini or gpt oss safeguard 120b?

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 Mini and gpt oss safeguard 120b open-weight models?

GPT-5.4 Mini: API only. gpt oss safeguard 120b: Open weights. 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 Mini and gpt oss safeguard 120b?

ModelCap currently lists 2 API providers for GPT-5.4 Mini and 0 for gpt oss safeguard 120b, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this GPT-5.4 Mini vs gpt oss safeguard 120b comparison?

Every figure comes from the sealed ModelCap dataset published 12 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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