openaimodelOpen Source

gpt-oss-20b

Open-source gpt-oss-20b model from openai — available for download and self-hosting on Hugging Face.

text free long-context

Best for

Long DocumentsBook SummarisationRAG

ollama run openai:gpt:oss:20b

Run locally

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Context Window

131K tokens ≈ 291 pages of text

Input Cost

Free

Output Cost

—

Latency p50

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Pricing Details

Standard PricingFree tier

Input (per 1M tokens)

$0.00

Output (per 1M tokens)

$0.00

Hallucination Score™ (est.)

Community reliability estimate · not official

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Not yet rated

About this score: Community-estimated based on user reports and publicly available benchmark data (e.g. TruthfulQA). This is not an official score from the model provider. Scores may be inaccurate — always verify with the official leaderboard before making production decisions.

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Provider

openai

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