# GPT-4

GPT-4 is an AI model released by OpenAI on Mar 14 2023. It has an 8k context window.

## Facts

| Field | Value |
| --- | --- |
| Model | GPT-4 |
| Developer | OpenAI |
| Release date | Tuesday, Mar 14 2023 |
| Licensing | Proprietary |
| Context window | 8k |

## API pricing

All rates in USD per 1,000,000 tokens, pay-as-you-go.

| Tier | Input | Output |
| --- | --- | --- |
| All documented contexts | $30.00 | $60.00 |

Verified August 18, 2026 against the first-party source: https://developers.openai.com/api/docs/models/gpt-4

## Benchmark scores published at release

| Benchmark | Score | Source | What it measures |
| --- | --- | --- | --- |
| HumanEval | 67% | Lab | 164 small Python problems: the AI is given a function's description and has to write the working function. This was the coding benchmark of the GPT-3.5 and GPT-4 era, before the field moved to fixing real bugs in real repositories. Higher is better. |
| MMLU | 86.4% | Lab | A 57-subject multiple-choice exam — history, law, medicine, maths — that was the standard measure of how much a model knows from 2020 until roughly 2024, when frontier scores crowded into the high 80s and labs moved on to harder tests. The scores here were published years apart under different testing setups, so read them as a historical record rather than a like-for-like ranking. Higher is better. |
| GSM8K | 92% | Lab | Grade-school maths word problems that take a few steps of arithmetic to work through. It separated the models of 2022 and 2023 sharply, then saturated. One caveat on the historical numbers: OpenAI included part of the GSM8K training set in GPT-4's pre-training mix, so GPT-4's score is not a clean few-shot result. Higher is better. |

## About GPT-4

GPT-4, released March 14, 2023, was the model that proved scaling kept working. It passed a simulated bar exam in the top 10% of test takers, accepted image input, and was so far ahead of contemporaries that it anchored ChatGPT Plus, Microsoft's Bing Chat, and the first wave of serious commercial LLM applications. Notably, Anthropic released Claude 1 the very same day.

OpenAI published almost no technical details — no parameter count, architecture, or training data — a break from research-lab tradition that set the industry's closed-frontier norm. GPT-4 headed OpenAI's lineup for more than a year, extended by GPT-4 Turbo's 128K context window in November 2023, until GPT-4o replaced it in May 2024.

## Questions and answers

### When was GPT-4 released?

GPT-4 was released by OpenAI on Tuesday, Mar 14 2023.

### Who made GPT-4?

GPT-4 was built by OpenAI. Creators of ChatGPT and the GPT series of models. Pioneered large-scale language model research.

### How much does GPT-4 cost?

GPT-4 costs $30.00 per million input tokens and $60.00 per million output tokens through the OpenAI API. Rates are pay-as-you-go API prices verified against OpenAI's published pricing on August 18, 2026.

### What benchmark scores did GPT-4 get?

GPT-4 reports 3 tracked benchmark scores — HumanEval: 67%; MMLU: 86.4%; GSM8K: 92%. Scores are the figures published at release by OpenAI.

### What is the context window of GPT-4?

GPT-4 has a context window of 8k. That is the maximum amount of input plus output the model can hold in a single request.

### Is GPT-4 open source?

No. GPT-4 is a proprietary model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.

### What came before and after GPT-4?

OpenAI's previous tracked release was GPT-3.5 on Nov 30 2022, 104 days earlier. It was followed by GPT-4 Turbo on Nov 6 2023.


---

Canonical page: https://aireleasetracker.com/model/openai/gpt-4
Full dataset: https://aireleasetracker.com/llms-full.txt · JSON: https://aireleasetracker.com/models.json
Source: AI Release Tracker (https://aireleasetracker.com). Benchmark scores are the figures published by the releasing lab at launch.