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OpenAI · Open weights

GPT-OSS 120B TEE

Added Jan 1, 2024Open weights

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Use in the app

Open-source GPT model with 120B parameters. running inside a TEE (Trusted Execution Environment), with provider attestation support.

Input
Text
Output
Text
Discovery tier
Open weights

Pricing

USD per 1M tokens
Input
$2.00
Output
$2.00
Cache read
$2.00

Reference prices as published by the model provider. API example

Specifications

Context window
131.1K
Max output
16.4K
Average output (7 days)
174 tokens
Longer than 18% of 468 models

Side by side

GPT-OSS 120B TEE compared

Specifications, prices, speed and benchmark scores next to each other. Benchmarks below show every compared model too.

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GPT-OSS 120B TEEOpenAIThis modelGPT 6.1 SolOpenAIRemove
ProviderOpenAIOpenAI
Discovery tierOpen weightsFrontier
AddedJan 1, 2024Sep 29, 2026
Limits
Context window131.07K1.05MBest
Max output16.38K128KBest
Average output174 tokens388 tokens
Pricing, USD per 1M tokens
Input$2.00$2.00
Output$2.00Best$10.00
Cache read$2.00$0.10Best
Cache write—$2.50
Performance
Throughput—149.7 tok/s
Time to first token—4.1 s
Request success (24h)—99.9%
Benchmark indexes
Intelligence Index11.647.8Best
Coding Index30.4—
Math Index93.4—
Capabilities
ReasoningNoYes
ToolsNoYes
VisionNoYes
Structured outputNoYes
PDF inputNoYes
Reasoning effort—low, medium, high, xhigh, max

Public evaluations

Benchmarks

Independent evaluation results, with how each score ranks among the models in the Noumen catalog.

  • GPT-OSS 120B TEE
  • GPT 6.1 Sol

Intelligence Index

  • GPT-OSS 120B TEE11.6
  • GPT 6.1 Sol47.8

GPT-OSS 120B TEE tested at high reasoning effort

GPT-OSS 120B TEE: Better than 25% of 326 scored models

3.8Catalog models by score55.1

Indexes

  • Coding Index

    Composite of the coding evaluations

    • GPT-OSS 120B TEE: 30.4
    • GPT 6.1 Sol: —

  • Math Index

    Composite of the math evaluations

    • GPT-OSS 120B TEE: 93.4
    • GPT 6.1 Sol: —

Agentic work

  • AutomationBench-AA

    Workflow automation, penalized for guardrail violations

    • GPT-OSS 120B TEE: 0.2%
    • GPT 6.1 Sol: 62.6%Top

  • AutomationBench-AA tasks completed

    Workflows finished end to end without a guardrail violation

    • GPT-OSS 120B TEE: 0.0%
    • GPT 6.1 Sol: 30.1%Top

  • AA-Briefcasev1.1

    Agentic knowledge work, rated head to head

    • GPT-OSS 120B TEE: —
    • GPT 6.1 Sol: 1,359 Elo

  • GDPval-AAv2.1

    Economically valuable occupational tasks, rated head to head

    • GPT-OSS 120B TEE: 608 Elo
    • GPT 6.1 Sol: 1,450 EloTop

Document reasoning

  • GDP.pdf

    Professional reasoning over PDF documents, all-pass rate

    • GPT-OSS 120B TEE: 4.0%
    • GPT 6.1 Sol: 30.0%Top

  • AA-LCRv1.1

    Reasoning across long documents

    • GPT-OSS 120B TEE: 52.0%
    • GPT 6.1 Sol: 83.3%Top

  • MLCR-AA

    Long-context reasoning over medical records

    • GPT-OSS 120B TEE: 1.7%
    • GPT 6.1 Sol: 32.2%Top

Reasoning and knowledge

  • Humanity’s Last Exam

    Expert-level questions across academic fields

    • GPT-OSS 120B TEE: 19.6%
    • GPT 6.1 Sol: 49.9%Top

  • GPQA Diamond

    Graduate-level science questions

    • GPT-OSS 120B TEE: 78.2%
    • GPT 6.1 Sol: —

  • MMLU-Pro

    Multi-subject knowledge and reasoning

    • GPT-OSS 120B TEE: 80.8%
    • GPT 6.1 Sol: —

  • IFBench

    Following precise output instructions

    • GPT-OSS 120B TEE: 69.0%
    • GPT 6.1 Sol: —

Coding

  • Terminal-Benchv4.0

    Practical software engineering in a terminal

    • GPT-OSS 120B TEE: 0.0%
    • GPT 6.1 Sol: 48.0%Top

  • SciCode

    Scientific computing in Python

    • GPT-OSS 120B TEE: 34.0%
    • GPT 6.1 Sol: 53.2%Top

  • LiveCodeBench

    Recent competitive programming problems

    • GPT-OSS 120B TEE: 87.8%
    • GPT 6.1 Sol: —

Math

  • AIME 2025

    Competition mathematics, 2025 problems

    • GPT-OSS 120B TEE: 93.4%
    • GPT 6.1 Sol: —

Legacy evaluations

  • Terminal-Bench Hard

    Earlier terminal task suite

    • GPT-OSS 120B TEE: 23.5%
    • GPT 6.1 Sol: —

  • τ²-Bench Telecom

    Tool use in a customer-support simulation

    • GPT-OSS 120B TEE: 65.8%
    • GPT 6.1 Sol: —

  • AA-LCR (unversioned)

    Long-context reasoning, earlier grading

    • GPT-OSS 120B TEE: 52.0%
    • GPT 6.1 Sol: 83.3%Top

Scores from Artificial Analysis, updated Oct 26, 2026. GPT-OSS 120B TEE was tested at high reasoning effort; compare scores measured at the same effort.Artificial Analysis

Developers

Use it through the API

Noumen’s API is OpenAI-compatible: any Chat Completions client works with a base URL and a key.

Read the quickstart
curl https://www.noumen.xyz/api/v1/chat/completions \
  -H "Authorization: Bearer $NOUMEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "TEE/gpt-oss-120b",
    "messages": [{ "role": "user", "content": "Explain this stack trace." }]
  }'
import os
from openai import OpenAI

client = OpenAI(base_url="https://www.noumen.xyz/api/v1", api_key=os.environ["NOUMEN_API_KEY"])
reply = client.chat.completions.create(
    model="TEE/gpt-oss-120b",
    messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)

OpenAI

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