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LLM Model Comparison
Compare LLM model specifications and capabilities side by side
step3
StepFun
gpt-5.1-codex-max
OpenAIModalities
Modalities
Specifications
Specifications
Context Length
65,536
Context Length
400,000
Max Output Tokens
65,536
Max Output Tokens
128,000
Release Date
8/28/2025
Release Date
12/4/2025
Pricing
Pricing
Input Price ($/M tokens)
54.4% cheaper
$0.57
Input Price ($/M tokens)
$1.25
Output Price ($/M tokens)
85.8% cheaper
$1.42
Output Price ($/M tokens)
$10.00
Capabilities
Capabilities
Reasoning
Reasoning
Tool Calling
Tool Calling
Structured Outputs
Structured Outputs
Web Search
Web Search