GPT OSS 20B by OpenAI scores 30.7 out of 100 on the Neura Intelligence Index, ranking #274 among tracked AI models. This composite score is computed from 3 individual benchmarks across coding, math, reasoning, and language categories.

GPT OSS 20B costs $0.03/1M input tokens and $0.14/1M output tokens via API. At a typical 3:1 input-to-output ratio with 1M tokens/day usage, the estimated monthly cost is approximately $2.

Yes, GPT OSS 20B has open weights available under the apache_2_0 license. You can download and self-host the model.

GPT OSS 20B supports a context window of 131K tokens, allowing it to process moderate-length documents and conversations in a single request.

GPT OSS 20B achieves its highest score on GPQA Diamond with a score of 71.5%. This benchmark evaluates 448 graduate-level science questions (biology, chemistry, physics) designed to be hard for non-experts.