---
id: "2024-05-13-gpt-4o"
url: "https://postcutoff.com/e/2024-05-13-gpt-4o/"
as_of: "2026-11-13T13:49:00+01:00"
date: "2024-05-13"
date_precision: day
category: model-release
importance: 4
confidence: high
status: [Confirmed]
sources: 2
editor: human editor
human_review: null
version: "2026-10-04"
---

As of: 2026-11-13 13:49 CET.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/e/2024-05-13-gpt-4o/

# OpenAI launches GPT-4o, a natively multimodal 'omni' model

GPT-4o reasoned natively across text, audio and vision in real time, responding to speech in as little as 232 ms, and brought GPT-4-level intelligence to free ChatGPT users.

## Key facts
- Announced 13 May 2024
- Audio response latency as low as 232 ms, ~320 ms on average
- Single end-to-end model for text, vision and audio
- Available to free ChatGPT users; half the API price of GPT-4 Turbo
- Advanced Voice Mode rolled out later in 2024

## What happened

OpenAI demoed a conversational assistant that could hear, see and speak with human-like latency and emotional expressiveness.

## Why it matters

Made natural voice interaction with AI mainstream and set the standard for omni-modal assistants.

## Your AI and this story

- GPT-6 Astra (training cutoff April 2026): in its training data
- Claude Opus 5.5 (training cutoff June 2026): in its training data
- Gemini 4 Hydrogen (training cutoff March 2026): in its training data
- Grok 4.7 (training cutoff May 2026): in its training data

## Sources

1. [Hello GPT-4o (OpenAI)](https://openai.com/index/hello-gpt-4o/) (openai.com, official)
2. [GPT-4o System Card (OpenAI)](https://openai.com/index/gpt-4o-system-card/) (openai.com, docs)

## Changes

- 2026-09-29 (filed): Created

## Related

- 2024-09-12: [OpenAI o1: reasoning models trained with reinforcement learning](https://postcutoff.com/e/2024-09-12-openai-o1/index.md)
- 2023-03-14: [OpenAI releases GPT-4](https://postcutoff.com/e/2023-03-14-gpt-4/index.md)