gpt-oss-20b

Name: gpt-oss-20b
Brand: OpenAI
Price: 0.05 USD

20B

byOpenAI

gpt-oss-20b is an open-weight 21B parameter model released by OpenAI under the Apache 2.0 license. It uses a Mixture-of-Experts (MoE) architecture with 3.6B active parameters per forward pass, optimized for...

Chat withgpt-oss-20b

Input Price$0.05/1M tokens

Output Price$0.20/1M tokens

Intelligence24.5

Coding18.5

Specifications

Technical details and pricing.

ProviderOpenAI

Context Window131,072 tokens

Release DateAug 5, 2025

ModalitiesText

Benchmarks

10 benchmark scores from Artificial Analysis.

GPQA68.8%

MMLU Pro74.8%

HLE9.8%

LiveCodeBench77.7%

AIME 202589.3%

SciCode34.4%

LCR30.7%

IFBench65.1%

Tau260.2%

TerminalBench Hard10.6%

Composite Indices

Higher is better; speed and price are normalized

Standard Benchmarks

Only benchmarks with data are shown

Frequently Asked Questions

What is gpt-oss-20b good for?

Use gpt-oss-20b for everyday tasks like writing, summarizing, brainstorming, and getting clear explanations.

How much does gpt-oss-20b cost?

Pricing is based on usage. Current rates are $0.05/1M tokens for input and $0.20/1M tokens for output.

Can I try gpt-oss-20b for free?

Yes. You can start a chat instantly and test the model before deciding on a plan.

Does gpt-oss-20b support images or audio?

gpt-oss-20b focuses on text-based tasks.

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Benchmarks and pricing use Artificial Analysis where available. Catalog specs are used as a fallback.