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gpt-oss-120b

OpenAIdevelopers.openai.com/api/docs/models/gpt-oss-12

Most powerful open-weight model, fits into an H100 GPU

Open in Graph
data quality78

Updated 6 h ago · first seen 11 Sept 2026

model_01M293VC69K5D58EP5QCDWXVWY

Overview

Identity

Identity block not returned by the API for this entity.

Openness

Openness not classified yet — no sourced evidence to place this model in the ontology.

Key facts

Release date

Source:Hugging Face Hub (public pages, model cards, papers)T2observed 8 h agomedium

Knowledge cutoff

Source:OpenRouter public model & pricing listingT2observed 13 h agomedium

Official page
developers.openai.com/api/docs/models/gpt-oss-120b

Source:OpenAI Platform docsT1observed 13 h agohigh

Model card
huggingface.co/openai/gpt-oss-120b

Source:Hugging Face Hub (public pages, model cards, papers)T2observed 13 h agomedium

API model id

Source:OpenAI Platform docsT1observed 13 h agohigh

Openrouter id

Source:OpenRouter public model & pricing listingT2observed 13 h agomedium

Architecture

Architecture

Source:Hugging Face Hub (public pages, model cards, papers)T2observed 12 h agomedium

Model type

Source:Hugging Face Hub (public pages, model cards, papers)T2observed 12 h agomedium

Parameters

Source:Hugging Face Hub (public pages, model cards, papers)T2observed 13 h agomedium

Tokenizer

Source:OpenRouter public model & pricing listingT2observed 13 h agomedium

Weights dtype

Source:Hugging Face Hub (public pages, model cards, papers)T2observed 12 h agomedium

File size

Source:Hugging Face Hub (public pages, model cards, papers)T2observed 12 h agomedium

Library name

Source:Hugging Face Hub (public pages, model cards, papers)T2observed 12 h agomedium

Pipeline tag

Source:Hugging Face Hub (public pages, model cards, papers)T2observed 13 h agomedium

Hugging Face repo

Source:OpenRouter public model & pricing listingT2observed 13 h agomedium

Capabilities

Modalities

Modalities
text
Input
text
Output
text

Capabilities

  • Tool calling

    Yes

    OpenRouter public model & pricing listing · T2

  • Structured output

    Yes

    OpenRouter public model & pricing listing · T2

  • Reasoning

    Yes

    OpenRouter public model & pricing listing · T2

  • Vision

    Unavailable

  • Audio

    Unavailable

  • Fine-tuning available

    Unavailable

Context window

Source:OpenRouter public model & pricing listingT2observed 13 h agomedium

Max output

Source:OpenRouter public model & pricing listingT2observed 13 h agomedium

Knowledge cutoff

Source:OpenRouter public model & pricing listingT2observed 13 h agomedium

Tokenizer

Source:OpenRouter public model & pricing listingT2observed 13 h agomedium

Benchmarks10

Compare with another model →

Comparable same task and conditions · Partially comparable same task, conditions differ (effort, temperature, judge) · Not comparable different variant or metric

No benchmark results recorded

Results appear when a tier 1–3 source publishes them; we never copy scores without a source.

Providers & Pricing5

All offers in the price terminal →
Current prices per 1M tokens
ProviderInput / 1MOutput / 1MCached inBatch in / outContextObservedSource
OpenAI APIopenai/gpt-oss-120b$0.037$0.17——131.1K4 h agoopenrouter.aiT2
Fireworks AIfireworks/gpt-oss-120b$0.15$0.60$0.015——6 h agoapp.fireworks.aiT1
GroqCloudopenai/gpt-oss-120b$0.15$0.60——131.1K6 h agoconsole.groq.comT1
OpenAI APIopenai/gpt-oss-120b:batch$0.15$0.60——131.1K4 h agoopenrouter.aiT2
Together AIgpt-oss-120b$0.15$0.60———11 h agotogether.aiT1

USD per 1M tokens as published by each provider (USD). Rows are append-only: every change is kept in the history below.

Price history

Step lines per provider; amber markers are recorded changes. Click a marker or a row for the evidence behind that price.

Output price · USD / 1M tokens 4 providers

Output price history of gpt-oss-120b$0$0.20$0.40$0.60$0.80Sept 26Sept 26Sept 26Sept 26Sept 26Sept 26Sept 26Sept 26Fireworks AI: first observed → $0.60 · 11 Sept 2026OpenAI API: first observed → $0.17 · 11 Sept 2026OpenAI API: $0.17 → $0.60 · 11 Sept 2026GroqCloud: first observed → $0.60 · 11 Sept 2026Together AI: first observed → $0.60 · 11 Sept 2026
  • Fireworks AI
  • OpenAI API
  • GroqCloud
  • Together AI
  • Together AIfirst observed $0.6011 Sept 2026
  • GroqCloudfirst observed $0.6011 Sept 2026
  • OpenAI API$0.17 → $0.6011 Sept 2026
  • OpenAI APIfirst observed $0.1711 Sept 2026
  • Fireworks AIfirst observed $0.6011 Sept 2026

Input price · USD / 1M tokens 4 providers

Input price history of gpt-oss-120b$0$0.05$0.10$0.15$0.20Sept 26Sept 26Sept 26Sept 26Sept 26Sept 26Sept 26Sept 26Fireworks AI: first observed → $0.15 · 11 Sept 2026OpenAI API: first observed → $0.037 · 11 Sept 2026OpenAI API: $0.037 → $0.15 · 11 Sept 2026GroqCloud: first observed → $0.15 · 11 Sept 2026Together AI: first observed → $0.15 · 11 Sept 2026
  • Fireworks AI
  • OpenAI API
  • GroqCloud
  • Together AI
  • Together AIfirst observed $0.1511 Sept 2026
  • GroqCloudfirst observed $0.1511 Sept 2026
  • OpenAI API$0.037 → $0.1511 Sept 2026
  • OpenAI APIfirst observed $0.03711 Sept 2026
  • Fireworks AIfirst observed $0.1511 Sept 2026

Hardware fit37

Estimated

19 of 37 device × quantization combinations fit.

Run locally: your machine →
Estimated hardware fit
HardwareQuantizationDevice memoryEst. memoryFits
Apple M3 Ultra4bit—67.7 GB est.Yes
Mac Studio (Apple M5 Ultra)4bit—67.7 GB est.Yes
Apple M2 Ultra4bit—67.7 GB est.Yes
Apple M1 Ultra4bit—67.7 GB est.Yes
Apple M3 Max4bit—67.7 GB est.Yes
Apple M4 Max4bit—67.7 GB est.Yes
Mac Studio (Apple M5 Max)4bit—67.7 GB est.Yes
MacBook Pro (Apple M5 Max)4bit—67.7 GB est.Yes
Apple M2 Max4bit—67.7 GB est.Yes
NVIDIA A100 80GB4bit80 GB67.7 GB est.Yes
NVIDIA H100 SXM4bit80 GB67.7 GB est.Yes
NVIDIA H100 NVL4bit94 GB67.7 GB est.Yes
NVIDIA DGX Spark4bit128 GB67.7 GB est.Yes
NVIDIA H2004bit141 GB67.7 GB est.Yes
NVIDIA H200 NVL4bit141 GB67.7 GB est.Yes
NVIDIA B2004bit180 GB67.7 GB est.Yes
AMD Instinct MI300X4bit192 GB67.7 GB est.Yes
AMD Instinct MI325X4bit256 GB67.7 GB est.Yes
NVIDIA DGX B2004bit1,440 GB67.7 GB est.Yes
Apple M1 Max4bit—67.7 GB est.No
Apple M4 Pro4bit—67.7 GB est.No
Mac mini (Apple M5 Pro)4bit—67.7 GB est.No
MacBook Pro (Apple M5 Pro)4bit—67.7 GB est.No
Apple M3 Pro4bit—67.7 GB est.No
Apple M1 Pro4bit—67.7 GB est.No
Apple M2 Pro4bit—67.7 GB est.No
Apple M44bit—67.7 GB est.No
iMac (Apple M4)4bit—67.7 GB est.No
Mac mini (Apple M6)4bit—67.7 GB est.No
MacBook Air (Apple M5)4bit—67.7 GB est.No
MacBook Pro (Apple M5)4bit—67.7 GB est.No
Apple M24bit—67.7 GB est.No
Apple M34bit—67.7 GB est.No
Apple M14bit—67.7 GB est.No
NVIDIA GeForce RTX 30904bit24 GB67.7 GB est.No
NVIDIA GeForce RTX 40904bit24 GB67.7 GB est.No
NVIDIA GeForce RTX 50904bit32 GB67.7 GB est.No
Assumptions (6)
  • Estimated, not measured: weights = parameters × bytes/param × 1.15 runtime overhead.
  • bytes/param: 4bit = 0.5, 8bit = 1.0, fp16 = 2.0 (uniform quantization, no per-layer exceptions).
  • KV cache approximated at 0.5 GB per 8 192 tokens of context, independent of architecture (GQA/MLA models need less).
  • A model 'fits' when the estimate is at most the device memory minus 2 GB reserved for the OS and framework.
  • Mixture-of-experts models are estimated on total parameters (all experts must be resident); active parameters are ignored.
  • Device memory uses the largest configuration when several are listed (e.g. Apple silicon tiers).

Lineage

Open in Graph →
Explicit derived_from / fine_tuned_from / distilled_from relations stated by sources; artifacts collapsed by kind.
DESCENDANTS 0 · ARTIFACTS1 quantizationartifacts · collapsed1 quantization — artifacts · collapsedgpt-oss-120b116.8B params · this modelgpt-oss-120b — 116.8B params · this model

    Papers1

    Timeline18

    Full timeline →

    Change history41

    Temporal, append-only claims: a new observation closes the previous claim instead of overwriting it. Rewind the record with the as-of picker.

    Viewing AI Atlas as of 12 Mar 2026 — attributes exactly as the atlas knew them on that day; later corrections are not shown.

    Back to today →

    gpt-oss-120b was not yet in AI Atlas on 12 Mar 2026

    First seen 11 Sept 2026. Nothing is inferred backwards: no attribute is shown for dates before the first observation.
    41 claims · 36 properties

    Release daterelease_date6

    Claim history for Release date
    ValueValid from → toStatusSourceConfidenceExtractor
    4 Aug 2025 → currentcurrentHugging Face Hub (public pages, model cards, papers)T2mediumdeterministic
    5 Aug 2025 → supersededOpenRouter public model & pricing listingT2mediumdeterministic
    4 Aug 2025 → supersededHugging Face Hub (public pages, model cards, papers)T2mediumdeterministic
    5 Aug 2025 → supersededOpenRouter public model & pricing listingT2mediumdeterministic
    4 Aug 2025 → supersededHugging Face Hub (public pages, model cards, papers)T2mediumdeterministic
    5 Aug 2025 → supersededOpenRouter public model & pricing listingT2mediumdeterministic

    Opennessopenness1

    Claim history for Openness
    ValueValid from → toStatusSourceConfidenceExtractor
    open-weights → currentcurrentOpenAI Platform docsT1highdeterministic

    Licenselicense1

    Claim history for License
    ValueValid from → toStatusSourceConfidenceExtractor
    apache-2.0 → currentcurrentHugging Face Hub (public pages, model cards, papers)T2mediumdeterministic

    Architecturearchitecture1

    Claim history for Architecture
    ValueValid from → toStatusSourceConfidenceExtractor
    GptOssForCausalLM → currentcurrentHugging Face Hub (public pages, model cards, papers)T2mediumdeterministic

    Parametersparameter_count1

    Claim history for Parameters
    ValueValid from → toStatusSourceConfidenceExtractor
    116.8B → currentcurrentHugging Face Hub (public pages, model cards, papers)T2mediumdeterministic

    Context windowcontext_length1

    Claim history for Context window
    ValueValid from → toStatusSourceConfidenceExtractor
    131.1K tokens → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

    Max outputmax_output_tokens1

    Claim history for Max output
    ValueValid from → toStatusSourceConfidenceExtractor
    118K tokens → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

    Knowledge cutoffknowledge_cutoff1

    Claim history for Knowledge cutoff
    ValueValid from → toStatusSourceConfidenceExtractor
    Jun 2024 → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

    Modalitiesmodalities1

    Claim history for Modalities
    ValueValid from → toStatusSourceConfidenceExtractor
    text → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

    Input modalitiesmodalities_input1

    Claim history for Input modalities
    ValueValid from → toStatusSourceConfidenceExtractor
    text → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

    Output modalitiesmodalities_output1

    Claim history for Output modalities
    ValueValid from → toStatusSourceConfidenceExtractor
    text → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

    Tokenizertokenizer1

    Claim history for Tokenizer
    ValueValid from → toStatusSourceConfidenceExtractor
    GPT → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

    API model idapi_model_id1

    Claim history for API model id
    ValueValid from → toStatusSourceConfidenceExtractor
    gpt-oss-120b → currentcurrentOpenAI Platform docsT1highdeterministic

    File sizefile_size_gb1

    Claim history for File size
    ValueValid from → toStatusSourceConfidenceExtractor
    65.3 GB → currentcurrentHugging Face Hub (public pages, model cards, papers)T2mediumdeterministic

    Hugging Face repohf_repo1

    Claim history for Hugging Face repo
    ValueValid from → toStatusSourceConfidenceExtractor
    openai/gpt-oss-120b → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

    Pipeline tagpipeline_tag1

    Claim history for Pipeline tag
    ValueValid from → toStatusSourceConfidenceExtractor
    text-generation → currentcurrentHugging Face Hub (public pages, model cards, papers)T2mediumdeterministic

    Official pageofficial_url1

    Claim history for Official page
    ValueValid from → toStatusSourceConfidenceExtractor
    https://developers.openai.com/api/docs/models/gpt-oss-120b → currentcurrentOpenAI Platform docsT1highdeterministic

    Model cardmodel_card_url1

    Claim history for Model card
    ValueValid from → toStatusSourceConfidenceExtractor
    https://huggingface.co/openai/gpt-oss-120b → currentcurrentHugging Face Hub (public pages, model cards, papers)T2mediumdeterministic

    Downloadsmetric.downloads1

    Claim history for Downloads
    ValueValid from → toStatusSourceConfidenceExtractor
    5,463,732 → currentcurrentHugging Face Hub (public pages, model cards, papers)T2mediumdeterministic

    Likesmetric.likes1

    Claim history for Likes
    ValueValid from → toStatusSourceConfidenceExtractor
    5,188 → currentcurrentHugging Face Hub (public pages, model cards, papers)T2mediumdeterministic

    Descriptiondescription1

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    ValueValid from → toStatusSourceConfidenceExtractor
    Most powerful open-weight model, fits into an H100 GPU → currentcurrentOpenAI Platform docsT1highdeterministic

    Gatedgated1

    Claim history for Gated
    ValueValid from → toStatusSourceConfidenceExtractor
    No → currentcurrentHugging Face Hub (public pages, model cards, papers)T2mediumdeterministic

    Groq model idgroq_model_id1

    Claim history for Groq model id
    ValueValid from → toStatusSourceConfidenceExtractor
    openai/gpt-oss-120b → currentcurrentGroq — docs & pricingT1highdeterministic

    Hf inference providershf_inference_providers1

    Claim history for Hf inference providers
    ValueValid from → toStatusSourceConfidenceExtractor
    baseten, cerebras, deepinfra, featherless-ai, fireworks-ai, groq, novita, nscale, ovhcloud, scaleway, together → currentcurrentHugging Face Hub (public pages, model cards, papers)T2mediumdeterministic

    Last modifiedlast_modified1

    Claim history for Last modified
    ValueValid from → toStatusSourceConfidenceExtractor
    2025-08-26T17:25:03+00:00 → currentcurrentHugging Face Hub (public pages, model cards, papers)T2mediumdeterministic

    Library namelibrary_name1

    Claim history for Library name
    ValueValid from → toStatusSourceConfidenceExtractor
    transformers → currentcurrentHugging Face Hub (public pages, model cards, papers)T2mediumdeterministic

    Aa median output tokens per secondmetric.aa_median_output_tokens_per_second1

    Claim history for Aa median output tokens per second
    ValueValid from → toStatusSourceConfidenceExtractor
    189.4 → currentcurrentArtificial AnalysisT2mediumdeterministic

    Downloads all timemetric.downloads_all_time1

    Claim history for Downloads all time
    ValueValid from → toStatusSourceConfidenceExtractor
    55,645,128 → currentcurrentHugging Face Hub (public pages, model cards, papers)T2mediumdeterministic

    Model typemodel_type1

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    ValueValid from → toStatusSourceConfidenceExtractor
    gpt_oss → currentcurrentHugging Face Hub (public pages, model cards, papers)T2mediumdeterministic

    Openrouter idopenrouter_id1

    Claim history for Openrouter id
    ValueValid from → toStatusSourceConfidenceExtractor
    openai/gpt-oss-120b → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

    Reasoningreasoning1

    Claim history for Reasoning
    ValueValid from → toStatusSourceConfidenceExtractor
    Yes → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

    Structured outputstructured_output1

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    ValueValid from → toStatusSourceConfidenceExtractor
    Yes → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

    Supported parameterssupported_parameters1

    Claim history for Supported parameters
    ValueValid from → toStatusSourceConfidenceExtractor
    frequency_penalty, include_reasoning, logit_bias, logprobs, max_tokens, min_p, presence_penalty, reasoning, reasoning_effort, repetition_penalty, response_format, seed, stop, structured_outputs, temperature, tool_choice, tools, top_a, top_k, top_logprobs, top_p → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

    Tagstags1

    Claim history for Tags
    ValueValid from → toStatusSourceConfidenceExtractor
    transformers, safetensors, gpt_oss, text-generation, vllm, 8-bit, mxfp4 → currentcurrentHugging Face Hub (public pages, model cards, papers)T2mediumdeterministic

    Tool callingtool_calling1

    Claim history for Tool calling
    ValueValid from → toStatusSourceConfidenceExtractor
    Yes → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

    Weights dtypeweights_dtype1

    Claim history for Weights dtype
    ValueValid from → toStatusSourceConfidenceExtractor
    BF16, U8 → currentcurrentHugging Face Hub (public pages, model cards, papers)T2mediumdeterministic

    Claims are temporal and append-only: a new observation closes the previous claim (valid_to) instead of overwriting it. Conflicting claims from different sources are kept side by side and flagged — never averaged. Methodology →

    Provenance

    Attributed facts

    37

    Source tiers

    T1T25 / 32

    Freshest observation

    6 h ago

    Conflicts

    None

    Source documents 11

    Source documents
    SourceDocumentTypeTierLast observedSnapshots
    OpenAI Platform docsdevelopers.openai.com/api/docs/models.md model_docsT1· Official4 h ago1
    Fireworks AI — pricingdocs.fireworks.ai/serverless/pricing.md pricingT1· Official6 h ago2
    Together AI — pricingtogether.ai/pricing pricingT1· Official6 h ago1
    Groq — docs & pricingconsole.groq.com/docs/models model_docsT1· Official6 h ago3
    OpenRouter public model & pricing listingopenrouter.ai/api/v1/models catalogueT2· Quality secondary4 h ago6
    Hugging Face Hub (public pages, model cards, papers)huggingface.co/openai/gpt-oss-120b/raw/main/README.md model_cardT2· Quality secondary6 h ago1
    Hugging Face Hub (public pages, model cards, papers)huggingface.co/openai/gpt-oss-120b model_pageT2· Quality secondary6 h ago5
    Hugging Face Hub (public pages, model cards, papers)huggingface.co/amd/gpt-oss-120b-w-mxfp4-a-fp8 model_pageT2· Quality secondary7 h ago5
    Hugging Face Hub (public pages, model cards, papers)huggingface.co/models?author=openai&p=0&sort=downloads listingT2· Quality secondary7 h ago6
    SWE-bench leaderboardsswebench.com/ leaderboardT2· Quality secondary11 h ago1
    Artificial Analysisartificialanalysis.ai/leaderboards/models leaderboardT2· Quality secondary11 h ago1

    Tier 1 = official/primary, 2 = quality secondary, 3 = community, 4 = unverified. Every snapshot is archived; see all sources and the methodology.

    Data quality (78/100) measures how well AI Atlas knows this entity — completeness, primary-source ratio, freshness, conflicts — never how good the model is. Methodology →