gpt-oss-120b — Free AI Model & API

cerebras/gpt-oss-120b

chat coding

Get API key →

Context Window 128K

Max Output 8K

Rate Limit 30 RPM, 14,400 RPD, 1M TPD

Cost $0.00 FREE

Free Period Since May 10, 2026

Credit Card Not required

Status Online

Overview

Cerebras offers GPT-oss-120b, a powerful text-based LLM ideal for chat and coding, generating up to 8,000 tokens from 128,000-token contexts at 30 RPM, 14,400 RPD, and 1M TPD, without requiring a credit card and compatible with OpenAI.

Model ID

gpt-oss-120b

Base URL

https://api.cerebras.ai/v1

Specifications

Context: 128K · Output: 8K · Modality: text · OpenAI Compat: Yes

Quick Start

Integrate gpt-oss-120b with 3 lines of code. See the config generator for Claude Code, Cursor, and more.

from openai import OpenAI

client = OpenAI(
 base_url="https://api.cerebras.ai/v1",
 api_key="YOUR_API_KEY"
)

response = client.chat.completions.create(
 model="gpt-oss-120b",
 messages=[{"role": "user", "content": "Hello!"}]
)
print(response.choices[0].message.content)

import OpenAI from "openai";

const openai = new OpenAI({
 baseURL: "https://api.cerebras.ai/v1",
 apiKey: "YOUR_API_KEY",
});

const completion = await openai.chat.completions.create({
 model: "gpt-oss-120b",
 messages: [{ role: "user", content: "Hello!" }],
});

console.log(completion.choices[0].message.content);

curl https://api.cerebras.ai/v1/chat/completions \
 -H "Content-Type: application/json" \
 -H "Authorization: Bearer YOUR_API_KEY" \
 -d '{
 "model": "gpt-oss-120b",
 "messages": [{"role": "user", "content": "Hello!"}]
 }'

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Rate Limits & Constraints

Rate Limit 30 RPM, 14,400 RPD, 1M TPD

Context Window 128K

Max Output Tokens 8K

Cost Free — since May 10, 2026

Credit Card Not required

OpenAI Compatible Yes — drop-in replacement

Cerebras Platform Limitations

8K context window on free tier (vs 128K on paid)
Limited model selection — Llama and GPT-OSS only
1M tokens/day shared across models

Features & Use Cases

Best For

ChatCoding

Modality Support

text

Cerebras Highlights

Ultra-fast inference on WSE chips
1M tokens/day free
No credit card required
Llama 3.1 8B + GPT-OSS 120B available

Playground — Test gpt-oss-120b

Test gpt-oss-120b directly in your browser. Your API key is sent directly to Cerebras — never stored.

Model: gpt-oss-120b Get Key

🔒 Your key is never stored — sent directly to the model provider via our server proxy.

Ready to chat with gpt-oss-120b.

Frequently Asked Questions

How do I get an API key for gpt-oss-120b?

Sign up at Cerebras to get your API key. No credit card is required — just an email sign-up. Once you have the key, use the code snippets in the Quick Start section above.

Is gpt-oss-120b really free?

Yes. gpt-oss-120b is available on Cerebras's free tier and has been free since May 10, 2026. Rate limits apply: 30 RPM, 14,400 RPD, 1M TPD. Always check the provider's terms for any changes to the free tier.

What are gpt-oss-120b's rate limits?

30 RPM, 14,400 RPD, 1M TPD Context window: 128K. Max output: 8K. No credit card required.

What are the best free alternatives to gpt-oss-120b?

Popular free alternatives include inclusionAI: Ring-2.6-1T, Baidu Qianfan: CoBuddy (free), Owl Alpha. You can also browse all 147+ free models on our site.