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GPT-OSS 120B

OpenAIEstablishedReleased Aug 5, 2025
Overall Score
Coming soon
Arena Elo
1353
Categories Ranked
8of 8
Price (1M tokens)
$0 in / $0 out
Speed
262tok/s
Context
128K
Open WeightNon-Reasoning
Confidence
base

BenchLM is tracking GPT-OSS 120B, but sourced benchmark results are not published on the site yet. This page currently shows the model metadata we can verify now, and score-level benchmark coverage will appear once public evaluations land.

GPT-OSS 120B is a open weight model with a 128K token context window. It processes queries without explicit chain-of-thought reasoning, offering faster response times and lower token usage.

GPT-OSS 120B sits inside the GPT-OSS family alongside GPT-OSS 20B. This profile currently has 0 sourced benchmarks on BenchLM, so the benchmark sections below are intentionally marked as coming soon.

Its strongest category is Knowledge (#59), while its weakest is Multimodal & Grounded (#90). This performance profile makes it particularly effective for knowledge-intensive tasks like research, analysis, and factual Q&A.

Ranking Distribution

Category rank across 8 benchmark categories — sorted by best rank

Category Performance

Scores across all benchmark categories (0-100 scale)

Category Breakdown

Agentic

#61
40.2/ 100
Weight: 22%0 benchmarks
Terminal-Bench 2.0BrowseCompOSWorld-VerifiedGAIATAU-benchWebArena

Coding

#66
23.9/ 100
Weight: 20%0 benchmarks
SWE-bench VerifiedLiveCodeBenchSWE-bench ProSWE-RebenchSciCode

Reasoning

#70
30.6/ 100
Weight: 17%0 benchmarks
MuSRLongBench v2MRCRv2ARC-AGI-2

Knowledge

#59
45.1/ 100
Weight: 12%0 benchmarks
GPQASuperGPQAMMLU-ProHLEFrontierScienceSimpleQA

Math

#72
26.8/ 100
Weight: 5%0 benchmarks
AIME 2025BRUMO 2025MATH-500FrontierMath

Multilingual

#69
36.5/ 100
Weight: 7%0 benchmarks
MGSMMMLU-ProX

Multimodal

#90
19.9/ 100
Weight: 12%0 benchmarks
MMMU-ProOfficeQA Pro

Inst. Following

#88
39.4/ 100
Weight: 5%0 benchmarks
IFEvalIFBench

Chatbot Arena Performance

Text Overall1353CI: ±4.330,675 votes
Coding1391CI: ±7.76,500 votes
Math1382CI: ±13.71,794 votes
Instruction Following1326CI: ±7.07,826 votes
Creative Writing1279CI: ±9.83,954 votes
Multi-turn1328CI: ±8.75,011 votes
Hard Prompts1363CI: ±5.714,774 votes
Hard Prompts (English)1367CI: ±7.27,644 votes
Longer Query1325CI: ±7.86,471 votes

Benchmark Details

Only benchmark rows with an attached exact-source record are shown here. Source-unverified manual rows and generated rows are hidden from model pages.

GPT-OSS Family

Base entry

Frequently Asked Questions

How does GPT-OSS 120B perform overall in AI benchmarks?

BenchLM is tracking GPT-OSS 120B, but sourced benchmark coverage is still coming soon. We currently list its creator, model type, and context window while we wait for public benchmark results.

Is GPT-OSS 120B open source?

Yes, GPT-OSS 120B is an open weight model created by OpenAI, meaning it can be downloaded and run locally or fine-tuned for specific use cases.

Which sibling models are related to GPT-OSS 120B?

GPT-OSS 120B belongs to the GPT-OSS family. Related variants on BenchLM include GPT-OSS 20B.

Does GPT-OSS 120B have full benchmark coverage on BenchLM?

Not yet. GPT-OSS 120B currently has 0 published benchmark scores out of the 152 benchmarks BenchLM tracks. BenchLM only exposes non-generated public benchmark rows, so missing categories stay blank until a sourced evaluation is available.

What is the context window size of GPT-OSS 120B?

GPT-OSS 120B has a context window of 128K, which determines how much text it can process in a single interaction.

Last updated: April 20, 2026 · Runtime metrics stay blank until BenchLM has a sourced snapshot.

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