What is the default OpenAI model in Sim?

GPT-4.1 is the default OpenAI model in Sim.

What is the cheapest OpenAI model tracked in Sim?

GPT-5 Nano currently has the lowest listed input price at $0.05/1M tokens.

Which OpenAI model has the largest context window?

GPT-5.4 Pro currently has the largest listed context window at 1.05M tokens.

Which OpenAI models support tool use and function calling in Sim?

All OpenAI models in Sim support tool use and function calling, allowing agents to invoke external APIs, query databases, and run custom actions.

Back to Models

Provider

OpenAI models

21 models

Release timeline

When each model was first publicly available.

GPT-4.1

gpt-4.1

$2/1M in$8/1M out1.05M ctx

GPT-4.1 Mini

gpt-4.1-mini

$0.4/1M in$1.6/1M out1.05M ctx

GPT-4.1 Nano

gpt-4.1-nano

$0.1/1M in$0.4/1M out1.05M ctx

GPT-5.4 Pro

gpt-5.4-pro

$30/1M in$180/1M out1.05M ctx

GPT-5.4

gpt-5.4

$2.5/1M in$15/1M out1.05M ctx

GPT-5.4 Mini

gpt-5.4-mini

$0.75/1M in$4.5/1M out400k ctx

GPT-5.4 Nano

gpt-5.4-nano

$0.2/1M in$1.25/1M out400k ctx

GPT-5.2 Pro

gpt-5.2-pro

$21/1M in$168/1M out400k ctx

GPT-5.2

gpt-5.2

$1.75/1M in$14/1M out400k ctx

GPT-5.1

gpt-5.1

$1.25/1M in$10/1M out400k ctx

GPT-5 Pro

gpt-5-pro

$15/1M in$120/1M out400k ctx

GPT-5

gpt-5

$1.25/1M in$10/1M out400k ctx

GPT-5 Mini

gpt-5-mini

$0.25/1M in$2/1M out400k ctx

GPT-5 Nano

gpt-5-nano

$0.05/1M in$0.4/1M out400k ctx

GPT-5 Chat Latest

gpt-5-chat-latest

$1.25/1M in$10/1M out128k ctx

o4 Mini

o4-mini

$1.1/1M in$4.4/1M out200k ctx

o3 Pro

o3-pro

$20/1M in$80/1M out200k ctx

o3

$2/1M in$8/1M out200k ctx

o3 Mini

o3-mini

$1.1/1M in$4.4/1M out200k ctx

o1

$15/1M in$60/1M out200k ctx

GPT-4o

gpt-4o

$2.5/1M in$10/1M out128k ctx

Frequently asked questions

Sim currently tracks 21 OpenAI models including GPT-4.1, GPT-4.1 Mini, GPT-4.1 Nano, GPT-5.4 Pro, GPT-5.4, GPT-5.4 Mini, and more.