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OpenAI: gpt-oss-120b

gpt-oss-120b is an open-weight, 117B-parameter Mixture-of-Experts (MoE) language model from OpenAI designed for high-reasoning, agentic, and general-purpose production use cases. $0.03 per million input tokens, $0.17 per million output tokens. 131,072 token context window, maximum output of 131,072 tokens. Higher uptime with 18 providers. Includes independent benchmarks from Artificial Analysis.

View source on OpenRouter Hugging Face
Overview

Model specifications

Context
131,072 tokens
Maximum output
117,964 tokens
Architecture
text->text
Tokenizer
GPT
Knowledge cutoff
2024-06-30
Moderated
No
OPENROUTER

Complete pricing

Synchronized OpenRouter rates. Token prices are shown per one million tokens.

Input
$0.03
/M tokens
Output
$0.17
/M tokens
Cache read
$0.03
/M tokens
API

Model configuration

Reasoning

Moderated
Yes
Default parameters
medium
Capabilities
high, medium, low
API

Quick start

Call this exact model ID through OpenRouter’s OpenAI-compatible API.

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

Input → Output

Input
text
Output
text
Reasoning

No · high · medium · low

API

Supported API parameters

frequency_penaltyinclude_reasoninglogit_biaslogprobsmax_tokensmin_ppresence_penaltyreasoningreasoning_effortrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_atop_ktop_logprobstop_p
Available providers

20 providers

Live providers on OpenRouter

Provider availability, latency, throughput and routing can change continuously. Open the source page for current operational data.

OpenRouter

AkashML

bf16
Context
131K
Maximum output
118K
Input
$0.030
Output
$0.170
Cache read
$0.030
Cache write
Not provided

CoreWeave

fp4
Context
131K
Maximum output
118K
Input
$0.030
Output
$0.170
Cache read
$0.030
Cache write
Not provided

DeepInfra

bf16
Context
131K
Maximum output
118K
Input
$0.037
Output
$0.170
Cache read
Not provided
Cache write
Not provided

Novita

fp4
Context
131K
Maximum output
33K
Input
$0.050
Output
$0.250
Cache read
Not provided
Cache write
Not provided

SiliconFlow

fp8
Context
131K
Maximum output
8K
Input
$0.050
Output
$0.450
Cache read
Not provided
Cache write
Not provided

DigitalOcean

unknown
Context
128K
Maximum output
115K
Input
$0.055
Output
$0.385
Cache read
$0.020
Cache write
Not provided

Mancer 2

fp8
Context
131K
Maximum output
118K
Input
$0.065
Output
$0.500
Cache read
Not provided
Cache write
Not provided

Google

unknown
Context
131K
Maximum output
118K
Input
$0.090
Output
$0.360
Cache read
Not provided
Cache write
Not provided

BaseTen

fp4
Context
128K
Maximum output
115K
Input
$0.100
Output
$0.500
Cache read
$0.100
Cache write
Not provided

Parasail

fp4
Context
131K
Maximum output
118K
Input
$0.100
Output
$0.750
Cache read
$0.055
Cache write
Not provided

SambaNova

unknown
Context
131K
Maximum output
118K
Input
$0.140
Output
$0.950
Cache read
Not provided
Cache write
Not provided

Amazon Bedrock

unknown
Context
131K
Maximum output
118K
Input
$0.150
Output
$0.600
Cache read
Not provided
Cache write
Not provided

DeepInfra

bf16
Context
131K
Maximum output
16K
Input
$0.150
Output
$0.600
Cache read
Not provided
Cache write
Not provided

Groq

unknown
Context
131K
Maximum output
66K
Input
$0.150
Output
$0.600
Cache read
$0.075
Cache write
Not provided

Phala

unknown
Context
131K
Maximum output
118K
Input
$0.150
Output
$0.600
Cache read
Not provided
Cache write
Not provided

Amazon Bedrock

unknown
Context
131K
Maximum output
118K
Input
$0.150
Output
$0.600
Cache read
Not provided
Cache write
Not provided

Together

unknown
Context
131K
Maximum output
118K
Input
$0.150
Output
$0.600
Cache read
Not provided
Cache write
Not provided

Nebius

fp4
Context
131K
Maximum output
118K
Input
$0.150
Output
$0.600
Cache read
Not provided
Cache write
Not provided

Mara

unknown
Context
131K
Maximum output
118K
Input
$0.150
Output
$0.750
Cache read
Not provided
Cache write
Not provided

Cerebras

fp16
Context
131K
Maximum output
41K
Input
$0.350
Output
$0.750
Cache read
$0.350
Cache write
Not provided
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