# GPT-5.4 nano

GPT-5.4 nano is an AI model released by OpenAI on Mar 17 2026. At release it scored 14% on BullshitBench v2.

## Facts

| Field | Value |
| --- | --- |
| Model | GPT-5.4 nano |
| Developer | OpenAI |
| Release date | Tuesday, Mar 17 2026 |
| Licensing | Proprietary |

## API pricing

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

| Tier | Input | Cached input | Output |
| --- | --- | --- | --- |
| All documented contexts | $0.20 | $0.02 | $1.25 |

Verified August 18, 2026 against the first-party source: https://developers.openai.com/api/docs/models/gpt-5.4-nano

## Benchmark scores published at release

| Benchmark | Score | What it measures |
| --- | --- | --- |
| BullshitBench v2 | 14% | 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. |

## Questions and answers

### When was GPT-5.4 nano released?

GPT-5.4 nano was released by OpenAI on Tuesday, Mar 17 2026.

### Who made GPT-5.4 nano?

GPT-5.4 nano was built by OpenAI. Creators of ChatGPT and the GPT series of models. Pioneered large-scale language model research.

### How much does GPT-5.4 nano cost?

GPT-5.4 nano costs $0.20 per million input tokens and $1.25 per million output tokens through the OpenAI API. Cached input is $0.02 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-5.4 nano get?

GPT-5.4 nano reports 1 tracked benchmark score — BullshitBench v2: 14%. Scores are the figures published at release by OpenAI.

### Is GPT-5.4 nano open source?

No. GPT-5.4 nano 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-5.4 nano?

OpenAI's previous tracked release was GPT-5.4 mini on Mar 17 2026. It was followed by GPT-5.5 on Apr 23 2026.


---

Canonical page: https://aireleasetracker.com/model/openai/gpt-5.4-nano
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.