import requests r = requests.post( "https://api.aimlapi.com/v1/chat/completions", headers={"Authorization": "Bearer " + AIMLAPI_KEY}, json={ "model": "openai/gpt-oss-20b", "messages": [ { "role": "user", "content": "Hello!" } ] }, ) print(r.json())
const r = await fetch("https://api.aimlapi.com/v1/chat/completions", { method: "POST", headers: { Authorization: `Bearer ${process.env.AIMLAPI_KEY}`, "Content-Type": "application/json", }, body: JSON.stringify({ "model": "openai/gpt-oss-20b", "messages": [ { "role": "user", "content": "Hello!" } ] }), }); console.log(await r.json());
curl -X POST https://api.aimlapi.com/v1/chat/completions \ -H "Authorization: Bearer $AIMLAPI_KEY" \ -H "Content-Type: application/json" \ -d '{"model":"openai/gpt-oss-20b","messages":[{"role":"user","content":"Hello!"}]}'
OpenAI-compatible — swap the base URL and it works with your existing SDK.
| Type | Price |
|---|---|
| Input | |
| Output | |
| Cached input |
| Benchmark | Score | What it measures | Source | Retrieved |
|---|---|---|---|---|
| Humanity's Last Exam | 10.9% | Expert-level questions across many domains | Source | July 13, 2026 |
| GPQA Diamond | 71.5% | Google-proof graduate science questions (hardest subset) | Source | July 13, 2026 |
| AIME 2025 | 91.7% | Competition mathematics (AIME), 2025 | Source | July 13, 2026 |
| Intelligence | 10 | Composite score across standardised reasoning, knowledge and problem-solving evaluations, measured independently by Artificial Analysis | Source | September 12, 2026 |
| Math | 62.3 | Composite score across standardised mathematics evaluations, measured independently by Artificial Analysis | Source | September 12, 2026 |
| Model | Input | Output | Context | Best for |
|---|---|---|---|---|
GPT OSS 20B This page | Reasoning + agents | |||
| Reasoning + agents | ||||
| Balanced coding + agents | ||||
| Long-context, multimodal & agentic workflows | ||||
| Reasoning + agents |
GPT OSS 20B has a 131,000 tokens context window and can return up to 131,072 tokens.
GPT OSS 20B takes text as input and returns text.
Use openai/gpt-oss-20b as the model id. Requests go to https://api.aimlapi.com/v1/chat/completions.
GPT OSS 20B became available on September 9, 2025.
GPT OSS 20B is priced at input $0.103155 / 1M tokens, output $0.41262 / 1M tokens, cached input $0.0515775 / 1M tokens.
Yes, GPT OSS 20B can stream responses as they are generated.
GPT OSS 20B was built by OpenAI.