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OpenAI: gpt-oss-20b (free)
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...
Best for
Long DocumentsBook SummarisationRAG
Context Window
131K tokens ≈ 291 pages of text
Input Cost
$0.03/1M
Output Cost
$0.14/1M
Latency p50
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Pricing Details
Standard Pricing
Input (per 1M tokens)
$0.03
Output (per 1M tokens)
$0.14
Price history
4/11/2026$0.03 in / $0.14 out
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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openai
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