gpt-oss-20b (free) pricing & benchmarks
Released Aug 5, 2025 · served by 1 provider
What gpt-oss-20b (free) is
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...
- Model ID:
openai/gpt-oss-20b:free - Modality: text->text
- Knowledge cutoff: 2024-06-30
- Tool calling: supported · Structured output: supported
- Weights:
openai/gpt-oss-20bon Hugging Face
Providers and prices for gpt-oss-20b (free)
The same model costs different amounts depending on who serves it. Prices are per 1M tokens, cheapest first. Uptime and throughput are OpenRouter's rolling measurements, not vendor claims.
| Provider | Input | Output | Context | Quant | Uptime 24h | Throughput |
|---|---|---|---|---|---|---|
| Darkbloomcheapest | Free | Free | 131K | — | 97.5% | — |
gpt-oss-20b (free) benchmark results
Design Arena head-to-head results, as reported through the OpenRouter model API.
| Category | Arena | Rank | Elo | Win rate |
|---|---|---|---|---|
| dataviz | models | #100 | 963 | 39.7% |
| website | models | #115 | 877 | 27.9% |
FAQ
How much does the gpt-oss-20b (free) API cost?
Free per 1M input tokens and Free per 1M output tokens.
Is gpt-oss-20b (free) free?
Yes — it is served at $0 for both input and output tokens on OpenRouter, subject to rate limits.
Which provider is cheapest for gpt-oss-20b (free)?
Darkbloom at Free input / Free output per 1M tokens.
Can I self-host gpt-oss-20b (free)?
Yes — weights are published as openai/gpt-oss-20b on Hugging Face, so you can run it on your own hardware.