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Comparison of gpt-oss-120b, OpenAI: GPT-6 Luna
2 modelsopenaigpt-oss-120bRemove ×openaiOpenAI: GPT-6 LunaRemove ×
What’s differentgpt-oss-120b is an open-weight, 117B-parameter Mixture-of-Experts (MoE) language model from OpenAI designed for high-reasoning, agentic, and general-purpose production use cases. The model supports…Can turn reasoning off for high-volume requests; Chat Completions tool calls require reasoning_effort=none.
DateAug 4, 2025ListedSep 22, 2026Released
Listed rate$0.03 in / $0.15 out/ 1M tokensVenice · via OpenRouter · all routes ↗venice/int4 · quantization=int4$0.05 in / $0.25 out/ 1M tokensOpenAI · via OpenRouter · all routes ↗openai/flex · tier=flex · prompt ≤ 272000 tokens
Provider endpoints38 endpoints →9 endpoints →
AA Intelligence ↗4.3.2Not reported38.12 ↗Effort: max · MaxIndependent result
AA-Briefcase ↗1.1Not reported1,334.66 ↗Effort: max · MaxIndependent result
GDPval-AA ↗2.1Not reported1,431.02 ↗Effort: max · MaxIndependent result
AutomationBench-AA ↗AA Index 4.3.2 collectionNot reported53.17% ↗Effort: max · MaxIndependent result
Terminal-Bench 4.0 · AA ↗Not reported12.63% ↗Effort: max · MaxHarness unreportedIndependent result
SciCode ↗AA Index 4.3.2 collectionNot reported54.63% ↗AA · Under reviewEffort: max · MaxIndependent result
Humanity’s Last Exam ↗AA Index 4.3.2 collectionNot reported38.51% ↗Effort: max · MaxIndependent result
GDP.pdf ↗AA Index 4.3.2 collectionNot reported22.8% ↗Effort: max · MaxIndependent result
CritPt ↗AA Index 4.3.2 collectionNot reported19.43% ↗AA · Under reviewEffort: max · MaxIndependent result
AA-Omniscience ↗AA Index 4.3.2 collectionNot reported0.65 ↗Effort: max · MaxIndependent result
AA-LCR ↗1.1Not reported83.33% ↗Effort: max · MaxIndependent result
LiveBench ↗2.0 · 2026-10-14 (dataset 2026-09-02)Not reported69.4% ↗Effort: max · single run · equal mean of 7 suitesIndependent result
LiveBench Design ↗2.0 · 2026-10-14 (dataset 2026-09-02)Not reported82.5% ↗Effort: max · single runIndependent result
LiveBench Research ↗2.0 · 2026-10-14 (dataset 2026-09-02)Not reported43.5% ↗Effort: max · single runIndependent result
LiveBench Browser Use ↗2.0 · 2026-10-14 (dataset 2026-09-02)Not reported72% ↗Effort: max · single runIndependent result
LiveBench Coding ↗2.0 · 2026-10-14 (dataset 2026-09-02)Not reported84.5% ↗Effort: max · single runIndependent result
LiveBench Agentic ↗2.0 · 2026-10-14 (dataset 2026-09-02)Not reported48.1% ↗Effort: max · single runIndependent result
LiveBench Data Analysis ↗2.0 · 2026-10-14 (dataset 2026-09-02)Not reported73.4% ↗Effort: max · single runIndependent result
LiveBench Reasoning ↗2.0 · 2026-10-14 (dataset 2026-09-02)Not reported81.8% ↗Effort: max · single runIndependent result
Context window131.1K1.1M
Max output65.5K128K
Parameters120B—
Tool callingSupportedSupported
Structured outputSupportedSupported
Image inputNot reportedSupported
ReasoningSupportedSupported
Prompt cachingSupportedSupported
Open weightsSupportedNot reported

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