OpenAI model product
GPT-OSS-20B
9B parameters and enhanced reasoning through high-effort thinking.
Updated Sep 8, 2026. Default version: GPT OSS 20B High
LLMBoard Score46.0GPT OSS 20B High
Coverage0%2 benchmark families
Context window131.1KTokens
Official input priceN/AOfficial price unavailable
GPT-OSS-20B Capability Profile
This profile uses the model's current scored version. Arena ratings and prices are shown separately.
GPT-OSS-20B Arena Results
Preference and agent-evaluation results for the default version.
No Arena results
The default version does not have a matching Arena result yet.
GPT-OSS-20B Pricing
Official vendor API pricing appears first, followed by individual provider offers.
- Official API
- N/A
- Official provider
- N/A
- Lowest third-party
- N/A
- Tracked offerings
- 0
No provider prices
The default version has no current input or output token prices.
Official prices use only the vendor's configured official Provider and positive standard USD PAYG rates. Third-party offers remain explicitly labeled.
GPT-OSS-20B Runtime Performance
Provider-specific output speed and catalog latency for GPT OSS 20B High. Runtime does not affect the capability score.
Sort by
Provider | Output Speed | Catalog Latency | Max Input | Max Output | Updated |
|---|
| ProviderOpenAI | Output Speed100.00 tok/s | Catalog Latency6.50 s | Max Input131.1K | Max Output131.1K | Updated |
Output Speed is generated output tokens received per second. Catalog latency is reported separately from observed provider TTFT.
GPT-OSS-20B Specifications
Technical details for the model's default version.
- Version
- GPT OSS 20B High
- Released
- Aug 5, 2025
- Knowledge cutoff
- Unknown
- Parameters
- 20.9B
- Context window
- 131.1K
- Max output
- 131.1K
- Inputs
- text
- Outputs
- text
- Open weights
- Yes
- License
- Apache 2.0
GPT-OSS-20B Versions
Available versions of this model. The score column identifies the version used in the overall ranking.
Sort by
Version | Released | LLMBoard | Parameters | Context | Max output | Open weights | License |
|---|
| VersionGPT OSS 20B | Released | LLMBoardN/A | Parameters20.9B | Context131.1K | Max output131.1K | Open weightsYes | LicenseApache 2.0 |
| VersionGPT OSS 20B High | Released | LLMBoard45.98 | Parameters20.9B | Context131.1K | Max output131.1K | Open weightsYes | LicenseApache 2.0 |
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What is GPT-OSS-20B?
Key information about GPT-OSS-20B and its available data.
GPT-OSS-20B is an OpenAI large language model variant designed for complex problems with deeper analysis than the base model. It can run on a single 80 GB GPU or on edge devices with 16 GB of memory.
Data as of 2026-09-08.
FAQ
Common questions about GPT-OSS-20B.
When was GPT-OSS-20B released?
GPT-OSS-20B's default version was released on Aug 5, 2025.
How much does GPT-OSS-20B cost?
No official standard PAYG price is currently available for GPT-OSS-20B.
Who created GPT-OSS-20B?
GPT-OSS-20B was created by OpenAI.
What is the context window for GPT-OSS-20B?
The default version has a 131.1K token context window.
Is GPT-OSS-20B open weight?
Yes. The default version is marked as open weight under Apache 2.0.
How many API providers offer GPT-OSS-20B?
No provider offering is currently linked to the default version.