OpenAI model
GPT-5.4
GPT-5.4 is a OpenAI model tracked in Sim. It supports a 1.05M token context window. Pricing starts at $2.5/1M input tokens and $15/1M output tokens. Key capabilities include Tool choice, Structured outputs, Reasoning none, low, medium, high, xhigh. Best for reasoning-heavy tasks that need more deliberate model control.
Input price$2.5/1M
Cached input$0.25/1M
Output price$15/1M
Context window1.05M
Max output128k tokens
ProviderOpenAI
UpdatedApr 1, 2026
Best forBest for reasoning-heavy tasks that need more deliberate model control.
TemperatureNot configurable
Reasoning effortnone, low, medium, high, xhigh
Verbositylow, medium, high
Thinking levelsNot supported
Structured outputsSupported
Tool choiceSupported
Computer useNot supported
Deep researchNot supported
Memory supportSupported
Max output tokens128k
Frequently asked questions
GPT-5.4 is a OpenAI model available in Sim. GPT-5.4 is a OpenAI model tracked in Sim. It supports a 1.05M token context window. Pricing starts at $2.5/1M input tokens and $15/1M output tokens. Key capabilities include Tool choice, Structured outputs, Reasoning none, low, medium, high, xhigh.