Model Comparison
gpt-oss-120b
vs
step3
Jan 13, 2026
Pricing
Input
$
0.05
/ M Tokens
$
0.57
/ M Tokens
Output
$
0.45
/ M Tokens
$
1.42
/ M Tokens
Metadata
Create on
Aug 4, 2025
Jul 28, 2025
License
APACHE-2.0
APACHE-2.0
Provider
OpenAI
StepFun
Specification
State
Available
Available
Architecture
Calibrated
Yes
No
Mixture of Experts
Yes
Yes
Total Parameters
120B
321B
Activated Parameters
5.1B
38B
Reasoning
No
No
Precision
FP8
FP8
Context length
131K
66K
Max Tokens
8K
66K
Supported Functionality
Serverless
Supported
Supported
Serverless LoRA
Not supported
Not supported
Fine-tuning
Not supported
Not supported
Embeddings
Not supported
Not supported
Rerankers
Not supported
Not supported
Support image input
Not supported
Not supported
JSON Mode
Supported
Supported
Structured Outputs
Not supported
Not supported
Tools
Not supported
Supported
Fim Completion
Not supported
Not supported
Chat Prefix Completion
Not supported
Not supported
gpt-oss-120b in Comparison
See how gpt-oss-120b compares with other popular models across key dimensions.
