GPT-5.5 Pro is a OpenAI model tracked in Sim. It supports a 1.05M token context window. Pricing starts at $30/1M input tokens and $180/1M output tokens. Key capabilities include Tool choice, Structured outputs, Reasoning none, low, medium, high, xhigh.
GPT-5.5 is a OpenAI model tracked in Sim. It supports a 1.05M token context window. Pricing starts at $5/1M input tokens and $30/1M output tokens. Key capabilities include Tool choice, Structured outputs, Reasoning none, low, medium, high, xhigh.
GPT-5.4 Pro is a OpenAI model tracked in Sim. It supports a 1.05M token context window. Pricing starts at $30/1M input tokens and $180/1M output tokens. Key capabilities include Tool choice, Structured outputs, Reasoning medium, high, xhigh.
When each model was first publicly available.
gpt-4.1
gpt-4.1-mini
gpt-4.1-nano
gpt-5.5-pro
gpt-5.5
gpt-5.4-pro
gpt-5.4
gpt-5.4-mini
gpt-5.4-nano
gpt-5.2-pro
gpt-5.2
gpt-5.1
gpt-5-pro
gpt-5
gpt-5-mini
gpt-5-nano
gpt-5-chat-latest
o4-mini
o3-pro
o3
o3-mini
o1
gpt-4o
Fastweb AI Factory — OpenAI-compatible endpoint
Anthropic's Claude models
Google's Gemini models
DeepSeek's chat models
Sim currently tracks 23 OpenAI models including GPT-4.1, GPT-4.1 Mini, GPT-4.1 Nano, GPT-5.5 Pro, GPT-5.5, GPT-5.4 Pro, and more.