# GPT-4o mini

GPT-4o mini is an AI model released by OpenAI on Jul 18 2024. It has a 128k context window. At release it scored 2% on BullshitBench v2 and 40.2% on GPQA Diamond.

## Facts

| Field | Value |
| --- | --- |
| Model | GPT-4o mini |
| Developer | OpenAI |
| Release date | Thursday, Jul 18 2024 |
| Licensing | Proprietary |
| Context window | 128k |

## API pricing

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

| Tier | Input | Cached input | Output |
| --- | --- | --- | --- |
| All documented contexts | $0.15 | $0.075 | $0.60 |

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

## Benchmark scores published at release

| Benchmark | Score | Source | What it measures |
| --- | --- | --- | --- |
| BullshitBench v2 | 2% | Lab | Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. |
| GPQA Diamond | 40.2% | Lab | 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-4o mini released?

GPT-4o mini was released by OpenAI on Thursday, Jul 18 2024.

### Who made GPT-4o mini?

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

### How much does GPT-4o mini cost?

GPT-4o mini costs $0.15 per million input tokens and $0.60 per million output tokens through the OpenAI API. Cached input is $0.075 per million tokens. Rates are pay-as-you-go API prices verified against OpenAI's published pricing on August 18, 2026.

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

GPT-4o mini reports 2 tracked benchmark scores — BullshitBench v2: 2%; GPQA Diamond: 40.2%. Scores are the figures published at release by OpenAI.

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

GPT-4o mini 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-4o mini open source?

No. GPT-4o mini 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-4o mini?

OpenAI's previous tracked release was GPT-4o on May 13 2024, 66 days earlier. It was followed by o1-preview on Sep 12 2024.


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