GPT OSS 120B High

by OpenAI

GPT OSS 120B High is a model from OpenAI, released on August 5, 2025. It has a 131K-token context window and can generate up to 131K output tokens. API pricing is $0.1 per 1M input tokens and $0.5 per 1M output tokens. It ranks #100 of 220 models by Intelligence Score with a score of 25.4.

GPT-OSS-120B High provides enhanced reasoning capabilities with high-effort thinking for complex problems. This variant offers deeper analysis and more thorough responses compared to the base model, making it ideal for challenging tasks that require extended reasoning. Activates 5.1B parameters per forward pass and is optimized to run on a single H100 GPU with native MXFP4 quantization.

Key specs

ProviderOpenAI
Release date2025-08-05
Licenseopen source
Context window131K tokens
Max output131K tokens
Input price$0.1 / 1M tokens
Output price$0.5 / 1M tokens
Intelligence Score25.4

Quick answers

What is the context window of GPT OSS 120B High?

GPT OSS 120B High has a context window of 131K tokens, with a maximum output of 131K tokens per response.

How much does GPT OSS 120B High cost?

GPT OSS 120B High costs $0.1 per 1M input tokens and $0.5 per 1M output tokens through the API.

Is GPT OSS 120B High open source?

Yes. GPT OSS 120B High is an open model released under the open source license.

When was GPT OSS 120B High released?

OpenAI released GPT OSS 120B High on August 5, 2025.

How does GPT OSS 120B High compare to Claude Opus 5.5 (Reasoning)?

GPT OSS 120B High scores 25.4 on the Intelligence Score versus 60.5 for Claude Opus 5.5 (Reasoning), the current #1. Input pricing is $0.1 vs $4 per 1M tokens.

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