OpenAIReleased on Aug 5, 2025

GPT OSS 20B: Benchmarks, Pricing & Context Window

GPT OSS 20B is a language model from OpenAI, released in August 2025.

The gpt-oss-20b model (technically 20.9B parameters) achieves near-parity with OpenAI o4-mini on core reasoning benchmarks, while running efficiently on a single 80 GB GPU. The gpt-oss-20b model delivers similar results to OpenAI o3‑mini

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GPT OSS 20B pricing

Providers

GPT OSS 20B starts at $0.0500 per million input tokens and $0.200 per million output tokens via Novita. See all 4 providers below with their per-token pricing, latency, throughput, and modality support.

ProviderInput $/MOutput $/MMax InputMax OutputLatency sThroughputQuantInputOutput
Novita logoNovita
$0.0500$0.200131.1K32.8K
bf16
Fireworks logoFireworks
$0.100$0.500131.0K30.0K
Groq logoGroq
$0.100$0.500131.0K30.0K
0.38
1000 c/s
OpenAI logoOpenAI
$0.100$0.500131.1K131.1K
5.20
115 c/s
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GPT OSS 20B API

API access coming soon

GPT OSS 20B will be available through our gateway shortly.

GPT OSS 20B examples

Recent arena outputs from GPT OSS 20B, picked from the highest-ranked matchups.

GPT OSS 20B license

GPT OSS 20B is released under the Apache 2.0 license, which permits commercial use, has 20.9B parameters.

License
Apache 2.0
Commercial use allowed
Parameters
20.9B

Apache License 2.0 - allows commercial use

FAQ

Common questions about GPT OSS 20B.

What is the GPT OSS 20B release date?

GPT OSS 20B was released on August 5, 2025 by OpenAI.

Who created GPT OSS 20B?

GPT OSS 20B was created by OpenAI.

How many parameters does GPT OSS 20B have?

GPT OSS 20B has 20.9 billion parameters.

What is the license for GPT OSS 20B?

GPT OSS 20B is released under the Apache 2.0 license. This is an open-source/open-weight license.