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GPT OSS 20B

Reasoning modelGPT OSSGPT OSS 20B

GPT Opensources 20B

Release date: 2025-08-06Updated: 2026-06-15 07:18:14.4551,573
Live demoGitHubHugging FaceCompare
Parameters
21B
Context length
128K
Chinese support
Supported
Reasoning ability

GPT Opensources 20B is an AI model published by OpenAI, released on 2025-08-06, for Reasoning model, with 21B parameters, and 128K context length, requiring about 42GB storage, with a 2516.00 score on CodeForces.

Data sourced primarily from official releases (GitHub, Hugging Face, papers), then benchmark leaderboards, then third-party evaluators. Learn about our data methodology

GPT OSS 20B

Model basics

Reasoning traces
Supported
Thinking modes
Thinking modes not supported
Context length
128K tokens
Max output length
4K tokens
Model type
Reasoning model
Modality (in / out)
Text → Text
Release date
2025-08-06
Model file size
42GB
MoE architecture
Yes
Total params / Active params
21B / 3.6B
Knowledge cutoff
No data
GPT OSS 20B

Open source & experience

Code license
Weights license
Apache 2.0- Commercial use permitted
GitHub repo
GitHub link unavailable
Live demo
No live demo
GPT OSS 20B

Official resources

Paper
DataLearnerAI blog
No blog post yet
GPT OSS 20B

API details

API speed
2/5
💡Default unit: $/1M tokens. If vendors use other units, follow their published pricing.
Standard
TypeConditionInputOutput
Text-$0.070/ 1M$0.300/ 1M
Batch
TypeConditionInputOutput
Text-$0.035/ 1M$0.150/ 1M
Cache PricingPrompt Cache
TypeTTLWriteRead
Text-$0.070/ 1M$0.040/ 1M
GPT OSS 20B

Benchmark Results

GPT OSS 20B currently shows benchmark results led by AIME 2024 (3 / 62, score 96), AIME2025 (14 / 107, score 98.70), CodeForces (9 / 16, score 2516). This page also consolidates core specs, context limits, and API pricing so you can evaluate the model from benchmark results and deployment constraints together.

Thinking
Tool usage

General Knowledge

5 evaluations
Benchmark / mode
Score
Rank/total
85.30
39 / 66
74
86 / 132
71.50
109 / 187
17.30
130 / 172
10.90
143 / 172

Coding and Software Engineer

3 evaluations
Benchmark / mode
Score
Rank/total
2516
9 / 16
2230
12 / 16

Math and Reasoning

3 evaluations
Benchmark / mode
Score
Rank/total
98.70
14 / 107
79
60 / 107
96
3 / 62

Agent Level Benchmark

1 evaluations
Benchmark / mode
Score
Rank/total
47.70
36 / 43

Instruction Following

1 evaluations
Benchmark / mode
Score
Rank/total
65.10
20 / 30

AI Agent - Information Search

1 evaluations
Benchmark / mode
Score
Rank/total
28.30
50 / 53

Claw-style Agent Evaluation

1 evaluations
Benchmark / mode
Score
Rank/total
Pinch Bench
Thinking ModeTools
66
34 / 37

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GPT OSS 20B

Publisher

GPT Opensources 20B

Model Overview

GPT Opensources 20B is an AI model published by OpenAI, released on 2025-08-06, for Reasoning model, with 21B parameters, and 128K context length, requiring about 42GB storage, with a 2516.00 score on CodeForces.

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