gpt-oss-20b (batch)
ModelOpen sourceActiveby OpenAI · family “gpt-ossb-batch”
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... (description from the OpenRouter listing)
in: textout: textReasoningTool useStructured output
Epoch Capabilities Index
Not scored by Epoch AI
Released
5 Aug 2025
Context window
131K tokens
Max output
118K tokens
Input $ / 1M tokens
$0.024
Output $ / 1M tokens
$0.11
Cached input $ / 1M
Unknown
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Benchmark results (0)
No benchmark results recorded for this model.
Source: Epoch AI Benchmarking Hub (CC BY 4.0). “External” rows are leaderboard results Epoch collects from third parties. Best reported setting per benchmark is shown.
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$ per 1M tokens
2 observations (OpenRouter listing + Internet Archive snapshots). History accumulates with every ingest run; a single point means no change has been observed yet.
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