AI Tool Profile

OpenAI API

OpenAI released GPT-4.5 as a research preview of its strongest GPT chat model, emphasizing broader knowledge, creativity, and natural collaboration.

Company
OpenAI
Primary category
AI Productivity Tools
Best for
Developers and ChatGPT users exploring writing, programming, communication, brainstorming, and creative work.
Pricing
Launched for ChatGPT Pro and paid API users as a compute-intensive research preview; API preview access was later deprecated, so current availability must be checked against OpenAI docs.
Free plan
no
API
yes
Open source/open weight
no
Linked launches
3
Latest launch date
May 7, 2026
Last verified
2026-06-08

Verification & Sources

Status
Verified profile
Source links
1
Freshness
Verified June 8, 2026
Last verified
June 8, 2026
Last updated
June 7, 2026

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What It Does

OpenAI released GPT-4.5 as a research preview of its strongest GPT chat model, emphasizing broader knowledge, creativity, and natural collaboration.

Launch History

AI Agents

Advancing voice intelligence with new models in the API

OpenAI released GPT-Realtime-2, GPT-Realtime-Translate, and GPT-Realtime-Whisper for realtime voice reasoning, translation, and streaming transcription in the API.

Free: No API: Yes Open: No
Creator coverageClear use caseCreator-friendlyBusiness-friendly
Kingy
8.5 / 10
Demo
3.0 / 10
YouTube
Medium

A high-signal API launch because it moves voice AI toward realtime agents that can reason, translate, transcribe, and act during a conversation.

AI Developer Tools

Introducing GPT-4.1 in the API

OpenAI launched GPT-4.1, GPT-4.1 mini, and GPT-4.1 nano in the API with improvements in coding, instruction following, and long context.

Free: No API: Yes Open: No
Clear use caseBusiness-friendlyDeveloper-friendlyTraction signal
Kingy
8.5 / 10
Demo
3.0 / 10
YouTube
Medium

A high-priority developer record because it became a practical model family for agents and code-heavy workloads.

AI Productivity Tools

Introducing GPT-4.5

OpenAI released GPT-4.5 as a research preview of its strongest GPT chat model, emphasizing broader knowledge, creativity, and natural collaboration.

Free: No API: Yes Open: No
Clear use caseBeginner-friendlyCreator-friendlyBusiness-friendly
Kingy
8.5 / 10
Demo
3.0 / 10
YouTube
Medium

A useful historical marker for the GPT scaling path, especially for writing quality and creative evaluation.