GPT-5.5 (by OpenAI)

Overview

OpenAI's frontier text model for complex professional work. Default reasoning effort is priced — deeper thinking costs more.

---

Quick facts

• Modes: Text → Text · Image → Text · Video → Text

• Default output / size: Text responses (token-limited)

• Controls: Reasoning effort, optional web search

---

What it's great for

• Frontier reasoning on hard professional tasks.

• Work that benefits from adjustable thinking depth.

• Multimodal analysis with optional web search.

---

Parameters

Control	Type	Default	Notes
Prompt	Text	—	Natural-language instruction (required)
Reasoning effort	Dropdown	—	Priced control; deeper thinking costs more
Web search	Toggle	Off	Optional; adds to the generation cost

---

Modes

Mode	Estimated time	Required inputs	Typical use
Text → Text	~24s	Prompt	Frontier reasoning & writing
Image → Text	~24s	Images, Prompt	Advanced image understanding
Video → Text	~24s	Videos, Prompt	Detailed video analysis

---