Creator
OpenAI
Released
2025-08-05
Intelligence
14.9
Artificial Analysis Index
Coding
20.7
Artificial Analysis Index
In $/1M
$0.07
input tokens
Out $/1M
$0.20
output tokens
Blended $/1M
$0.10
3:1 blended
Speed
180
tokens / sec
Profile
License, openness, and modality — the governance layer.
License
Apache 2.0
commercial OK
Weights
Open
downloadable
Modalities
Text
Parameters
21B
total
The gpt-oss-20b model (technically 20.9B parameters) achieves near-parity with OpenAI o4-mini on core reasoning benchmarks, while running efficiently on a single 80 GB GPU. The gpt-oss-20b model delivers similar results to OpenAI o3‑mini on common benchmarks and can run on edge devices with just 16 GB of memory, making it ideal for on-device use cases, local inference, or rapid iteration without costly infrastructure. Both models also perform strongly on tool use, few-shot function calling, CoT reasoning (as seen in results on the Tau-Bench agentic evaluation suite) and HealthBench (even outperforming proprietary models like OpenAI o1 and GPT‑4o). Note: While referred to as '20b' for simplicity, it technically has 20.9B parameters.
Capability profile
Category strength across 20 domains, via LLM Stats.
Benchmark breakdown
Independent evaluation scores, normalized to 0–100.