openai

OpenAI: gpt-oss-20b

The OpenAI gpt-oss-20b is a powerful text-focused AI model with a context length of 131,072 tokens and supports reasoning and tools integration. It can process large volumes of input while maintaining the ability to generate detailed and coherent responses, making it suitable for complex tasks that require both depth and breadth of understanding. This model should be considered by those seeking a robust text-based solution, especially when combined with external tools for enhanced functionality. With its blended benchmark score of 25.7 across four independent evaluations, it stands as a reliable choice; however, the pricing at $0.03 per million input tokens and $0.13 per million output tokens might be a factor to weigh against its performance in less frequently used applications.

Quality Score
91/100
price + capability + benchmarks
Input Price
$0.03
per 1M tokens
Output Price
$0.13
per 1M tokens
Context Window
131,072
tokens

Benchmark results

Independent, published benchmarks. Blended score 25.7 across 4 benchmarks, last refreshed 2026-08-13. How scoring works →

BenchmarkMeasuresScore
AI Index broad capability composite 25.1
AI Index Coding software engineering tasks 34.1
AI Index Agentic multi-step tool-using tasks 5.1
EQ-Bench emotional understanding in dialogue 40.7
Model ID
openai/gpt-oss-20b
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 $0.03/M input and $0.13/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 $0.02
A month of a busy support chatbot 5M in / 2M out $0.41

Price & spec history

Tracked daily by PicksByModel since 2026-07-17.

DateInput /MOutput /MContext
2026-08-02 $0.03 $0.13 131,072
2026-08-01 $0.03 $0.14 131,072
2026-07-30 $0.03 $0.13 131,072
2026-07-26 $0.03 $0.14 131,072
2026-07-25 $0.03 $0.13 131,072
2026-07-24 $0.03 $0.14 131,072
2026-07-17 $0.03 $0.13 131,072

Similar models

Quick answers

How much does OpenAI: gpt-oss-20b cost?
$0.03 per million input tokens and $0.13 per million output tokens.
What is OpenAI: gpt-oss-20b's context window?
131,072 tokens, roughly 196 pages of text in a single request.
Does OpenAI: gpt-oss-20b support tool calling?
It supports tool calling, structured output, a reasoning mode.
Can OpenAI: gpt-oss-20b process images?
No, it is text-only on the input side.