# GPT-4 Turbo

GPT-4 Turbo is an AI model released by OpenAI on Nov 6 2023. It has a 128k context window. At release it scored 42.5% on GPQA Diamond.

## Facts

| Field | Value |
| --- | --- |
| Model | GPT-4 Turbo |
| Developer | OpenAI |
| Release date | Monday, Nov 6 2023 |
| Licensing | Proprietary |
| Context window | 128k |

## API pricing

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

| Tier | Input | Output |
| --- | --- | --- |
| All documented contexts | $10.00 | $30.00 |

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

## Benchmark scores published at release

| Benchmark | Score | What it measures |
| --- | --- | --- |
| GPQA Diamond | 42.5% | Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. |

## Questions and answers

### When was GPT-4 Turbo released?

GPT-4 Turbo was released by OpenAI on Monday, Nov 6 2023.

### Who made GPT-4 Turbo?

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

### How much does GPT-4 Turbo cost?

GPT-4 Turbo costs $10.00 per million input tokens and $30.00 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 Turbo get?

GPT-4 Turbo reports 1 tracked benchmark score — GPQA Diamond: 42.5%. Scores are the figures published at release by OpenAI.

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

GPT-4 Turbo has a context window of 128k. That is the maximum amount of input plus output the model can hold in a single request.

### Is GPT-4 Turbo open source?

No. GPT-4 Turbo 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 Turbo?

OpenAI's previous tracked release was GPT-4 on Mar 14 2023, 237 days earlier. It was followed by GPT-4o on May 13 2024.


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Canonical page: https://aireleasetracker.com/model/openai/gpt-4-turbo
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.