When was GPT-4 released?

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

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.

GPT-4

Released Mar 14 2023

GPT-4 is an AI model released by OpenAI on Tuesday, Mar 14 2023, 104 days after GPT-3.5. It has a 8k token context window. Benchmark results (shown below) cover GSM8K, HumanEval, and MMLU.

API pricing

Input: $30.00
Output: $60.00

USD per 1M tokens

Available from


Azure	$30.00	$60.00	8K

USD per 1M tokens

Benchmarks

Coding

HumanEval

67%

#2 of 3

Reasoning & science

GSM8K

92%

MMLU

86.4%

#2 of 4

About

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.

Compare GPT-4 with

GPT-4

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Frequently asked questions

: GPT-4 was released by OpenAI on Tuesday, Mar 14 2023.
: GPT-4 was built by OpenAI. Creators of ChatGPT and the GPT series of models. Pioneered large-scale language model research.
: 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.
: GPT-4 reports 3 tracked benchmark scores — HumanEval: 67%; MMLU: 86.4%; GSM8K: 92%. Scores are the figures published at release by OpenAI.
: 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.
: 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.
: 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.