gpt-oss-120b

Name: gpt-oss-120b
Author: Vercel AI Gateway

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

131K

Input price

$0.35/1M tokens

Output price

$0.75/1M tokens

Capabilities

Show unsupported (2)

Reasoning & Interaction

Reasoning

Tool Calling

Output Control

Structured Output

JSON Mode

Infrastructure

Streaming

Batch Processing

Details

ProviderVercel AI Gateway

CreatorOpenAI

Familygpt-oss

Licenseapache-2.0

Statusactive

Typechat

Input modalitiestext

Output modalitiestext

Open weightYes

Parameters120B

Architecture—

Context window131K tokens

Max input—

Max output131K tokens

Reasoning tokensYes

Knowledge cutoff2024-06

Release date—

Sourceofficial

Tools

Function Callingfunction_calling

Call external functions and APIs

Pricing

Input

$0.35

Output

$0.75

Cache write

—

Cache read

—

Batch in

—

Batch out

—

Family Comparison: gpt-oss

Model	Caps	Perf	Speed	Context	Max out	Pricing
gpt-oss-20b	RTJJMSB	—	—	131K	131K	$0.07$0.3
gpt-oss-safeguard-20b	RTS	—	—	131K	—	$0.07$0.3
gpt-oss-safeguard-120b	RTS	—	—	128K	—	$0.15$0.6
gpt-oss-120b	RTJJMSB	—	—	131K	131K	$0.35$0.75

API

GET/v1/models/vercel/openai/gpt-oss-120b

gpt-oss-120b

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

Changes · 3 entries

openai/gpt-oss-120bupdateb301ebeMar 23, 2026, 11:47 PM

modalitiesinput["text"]output["text"]

openai/gpt-oss-120bupdate2b100acMar 23, 2026, 05:30 AM

model_typechat

parameters120

tools["function_calling"]

openai/gpt-oss-120bcreate7f5c66fMar 21, 2026, 05:16 AM