openai

OpenAI: gpt-oss-120b

The OpenAI gpt-oss-120b model is designed for text processing with a context length of 131,072 tokens and supports both reasoning tasks and the use of tools. It can generate structured or unstructured responses based on input, making it versatile for various applications that require deep understanding and complex task execution. Given its price at $0.037 per million input tokens and $0.17 per million output tokens, gpt-oss-120b is a cost-effective choice for projects with moderate to high token requirements. With a blended benchmark score of 43.3 across five independent evaluations, it performs well in tasks such as coding and reasoning but may be less effective in agentic tasks, indicating that while generally competent, its performance varies depending on the specific application.

Quality Score
91/100
price + capability + benchmarks
Input Price
$0.04
per 1M tokens
Output Price
$0.17
per 1M tokens
Context Window
131,072
tokens

Benchmark results

Independent, published benchmarks. Blended score 43.1 across 5 benchmarks, last refreshed 2026-07-27. How scoring works →

BenchmarkMeasuresScore
Aider Polyglot code editing across languages 41.8
AI Index broad capability composite 39.3
AI Index Coding software engineering tasks 50.2
AI Index Agentic multi-step tool-using tasks 21.7
EQ-Bench emotional understanding in dialogue 53.4
Model ID
openai/gpt-oss-120b
Vendor
openai
Released
August 2025
Tokenizer
GPT
Input Modalities
text
Output Modalities
text
Max Output
131,072 tokens
Tool Calling
✓ supported
Structured Output
✓ supported
Reasoning Mode
✓ supported
Vision
text only
Audio
no
Moderated
no

What it costs in practice

Computed from the current $0.04/M input and $0.17/M output rates. Run your own numbers →

JobTokensCost
Summarize a 50-page report 30k in / 1.5k out under $0.01
Classify 1,000 customer emails 500k in / 50k out $0.03
A month of a busy support chatbot 5M in / 2M out $0.53

Similar models

Quick answers

How much does OpenAI: gpt-oss-120b cost?
$0.04 per million input tokens and $0.17 per million output tokens.
What is OpenAI: gpt-oss-120b's context window?
131,072 tokens, roughly 196 pages of text in a single request.
Does OpenAI: gpt-oss-120b support tool calling?
It supports tool calling, structured output, a reasoning mode.
Can OpenAI: gpt-oss-120b process images?
No, it is text-only on the input side.