AI Observatory / Model Radar
OpenAI / openai/gpt-oss-20b:free
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...
131,072
Context
8,192
Max output
<$0.01 / 1M
Prompt price
2025-08-05
Created
01 / Snapshot
Pricing, context, modalities, and parameters.
Model Radar detail pages stay neutral and operator-readable: core metadata first, then workflow fit.
| Provider | OpenAI | Input modalities | text |
|---|---|---|---|
| Output modalities | text | Prompt price | <$0.01 / 1M |
| Completion price | <$0.01 / 1M | Request price | N/A |
| Context length | 131,072 | Max completion tokens | 8,192 |
| Supported parameters | include_reasoning, max_tokens, reasoning, seed, stop, temperature, tool_choice, tools | ||
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openai/gpt-oss-20b:free
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...
High-volume usage
Coding workflows
tool-capable
low-cost
03 / Colophon
Routes and exits.
Each model page stays simple: overview, compare, related models, then back to the public hub.