OpenAI GPT OSS

apache-2.0120B

`gpt-oss-120b`is our most powerful open-weight model, which fits into a single H100 GPU (117B parameters with 5.1B active parameters).

Intelligence
Reasoning
Speed
Context
131K
Max output
40K
Input price
$0.35/1M tokens
Output price
$0.75/1M tokens

Capabilities

vision
tool call
structured output
reasoning
json mode
streaming
fine tuning
batch

Details

Model IDgpt-oss-120b
Provider Cerebras
Creator OpenAI
Familygpt-oss
Licenseapache-2.0
Parameters120B
Statusactive
Input modalitiestext
Output modalitiestext
Architecture—
Knowledge cutoff
Training data cutoff—
Release date—
Deprecation date—
Typechat
Reasoning tokensYes
Max input—
Open weightYes
Prompt cachingSupported
Sourceofficial
Last updated

Tools

Function Callingfunction_calling
Call external functions and APIs

Endpoints

Chat CompletionsPOST
Generate chat responses with messageshttps://api.cerebras.ai/v1/chat/completions
CompletionsPOST
Legacy text completionhttps://api.cerebras.ai/v1/completions

Pricing

Input
$0.35
Output
$0.75
Cache write
—
Cache read
—
Batch in
—
Batch out
—

Price across providers

ProviderInputOutputSince launch
DeepInfracheapest$0.04$0.17↓5%
OpenRoutercheapest$0.04$0.17↓5%
Cloudflare AI Gateway$0.04$0.19—
Novita AI$0.05$0.25—
Groq$0.15$0.6—
SambaNova Cloud$0.22$0.59—
Cerebras$0.35$0.75—
Vercel AI Gateway$0.35$0.75—

API

GET/v1/models/cerebras/gpt-oss-120b