Model garden Router · warm Dedicated · available

gpt oss 120b

Instantly via the EU router or as a dedicated GPU deployment. Data stays in Europe.

Welcome to the gpt-oss series, OpenAI’s open-weight models designed for powerful reasoning, agentic tasks, and versatile developer use cases.

openai/gpt-oss-120b
text->text · openai · sovereign EU
Runs on EU infrastructure operated by European companies; US marketplace capacity is never part of this chain. Full chain
117B
Parameters
131K
Context window
80GB
Minimum VRAM
POST /api/v1/chat/completions 200 OK

Specifications

Parameters 117B
Context window 131,072 tokens
Context on every source 128,000 tokens · The router sends longer requests to a source where they fit.
Minimum VRAM 80 GB
Architecture GptOssForCausalLM (vLLM)
License apache-2.0
Modality text->text
Released August 2025
Publisher openai ↗

Pricing

Shared router · per token
€0.16
Input (per 1M tokens)
€0.63
Output (per 1M tokens)
Dedicated GPU · per hour
from €1,08 per hour
Your own vLLM instance on European cloud (80 GB VRAM), billed hourly.

Shared EU router, pay-per-token, scale-to-zero. Dedicated GPU deployments are billed hourly, see pricing.

Bench index

Bench is our quality index for every model, 0 to 100. It rests on public measurements (Epoch AI with about 40 benchmarks, LiveBench, LMArena and more) and is refreshed every morning. Where nobody measures, it shows an estimate with a range.

62.2 / 100 · Measured

Measured by Epoch AI across 14 benchmarks, with a range.

Range 57.0 to 65.2 · Rank 123 of 270 at Epoch AI

Sources: Epoch AI ↗ · LiveBench ↗ · LMArena ↗ · Refreshed daily, last on 23-10-2026

LiveBench · 46.1
Reasoning 39.2
Coding 60.2
Agentic coding 16.7
Mathematics 68.9
Data analysis 38.8
Language 48.6
Instruction following 50.3
Every benchmark (14)
OTIS Mock AIME 2024-2025 88.9
Lech Mazur Writing 77.1
GPQA diamond 70.5
DTBench 60.4
METR Time Horizons 56.6
WeirdML 48.2
Fiction.LiveBench 44.4
Aider polyglot 41.8
LMCA 26.0
Surface Evolver Bench 25.0
Terminal Bench 18.7
SimpleBench 6.5
APEX-Agents 4.4
Mystery Game Puzzles 0.0
LiveBench · All tasks
Reasoning
theory of mind 48.1
zebra puzzle 20.8
spatial 80.0
logic with navigation 8.0
Coding
code generation 70.4
code completion 50.0
Agentic coding
javascript 20.0
typescript 10.0
python 20.0
Mathematics
AMPS Hard 92.0
integrals with game 32.0
math comp 92.2
olympiad 59.3
Data analysis
consecutive events 2.9
tablejoin 29.2
tablereformat 84.3
Language
connections 79.2
plot unscrambling 18.6
typos 48.0
Instruction following
paraphrase 44.8
simplify 55.5
story generation 56.5
summarize 44.4

Call it now

Drop-in replacement for OpenAI: change only the base URL and API key. The Anthropic format (/v1/messages) is supported too.

curl https://hostyourai.com/api/v1/chat/completions \
  -H "Authorization: Bearer hyai-..." \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-oss-120b",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Frequently asked questions

Can I run gpt oss 120b in the EU?

Yes. HostYourAI runs gpt oss 120b on GPUs in European datacenters via vLLM. Prompts and outputs never leave the EU and there is no US cloud provider in the chain.

Is hosting gpt oss 120b GDPR-compliant?

Yes. All processing happens inside the EU, a Data Processing Agreement (DPA) is available and the subprocessor list is public. Open-source weights also mean: no training on your data.

How much does gpt oss 120b cost?

Via the shared EU router you pay €0.16 per million input tokens and €0.63 per million output tokens, with no fixed costs. For high volume or isolation you can also run gpt oss 120b as a dedicated hourly GPU instance.

Is the API OpenAI-compatible?

Yes. You use the standard OpenAI SDKs with a custom base URL (https://hostyourai.com/api/v1). The Anthropic Messages API is supported as a drop-in as well.

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