---
id: "2023-03-14-gpt-4"
url: "https://postcutoff.com/e/2023-03-14-gpt-4/"
as_of: "2026-11-13T13:49:00+01:00"
date: "2023-03-14"
date_precision: day
category: model-release
importance: 5
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/2023-03-14-gpt-4/

# OpenAI releases GPT-4

GPT-4, a large multimodal model accepting image and text input, reached human-level performance on many professional and academic exams, such as a simulated bar exam around the top 10% of test takers.

## Key facts
- Released 14 March 2023 in ChatGPT Plus and via API waitlist
- Simulated bar exam: around the top 10% of test takers (GPT-3.5: bottom 10%)
- Accepted image inputs (image input rolled out later)
- Technical report withheld architecture and training details
- Microsoft confirmed Bing Chat had been running on GPT-4

## What happened

OpenAI launched GPT-4 with a technical report and system card, showing a large jump over GPT-3.5 in reasoning and exams.

## Why it matters

Defined the frontier for over a year and triggered serious policy attention to AI risk (pause letter, hearings, summits).

## 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. [GPT-4 (OpenAI)](https://openai.com/index/gpt-4-research/) (openai.com, official)
2. [GPT-4 Technical Report (arXiv)](https://arxiv.org/abs/2303.08774) (arxiv.org, paper)

## Changes

- 2026-09-29 (filed): Created

## Related

- 2024-05-13: [OpenAI launches GPT-4o, a natively multimodal 'omni' model](https://postcutoff.com/e/2024-05-13-gpt-4o/index.md)
- 2023-03-14: [Anthropic releases Claude](https://postcutoff.com/e/2023-03-14-claude-1/index.md)
- 2022-11-30: [OpenAI launches ChatGPT](https://postcutoff.com/e/2022-11-30-chatgpt/index.md)