# GPT-5

GPT-5 is an AI model released by OpenAI on Aug 7 2025. At release it scored 21% on BullshitBench v2.

## Facts

| Field | Value |
| --- | --- |
| Model | GPT-5 |
| Developer | OpenAI |
| Release date | Thursday, Aug 7 2025 |
| 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 | $1.25 | $0.125 | $10.00 |

Verified August 18, 2026 against the first-party source: https://developers.openai.com/api/docs/models/gpt-5

## Benchmark scores published at release

| Benchmark | Score | Source | What it measures |
| --- | --- | --- | --- |
| BullshitBench v2 | 21% | 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. |

## About GPT-5

GPT-5, released August 7, 2025, collapsed OpenAI's confusing two-track lineup — GPT-4.1 for speed, o3 for reasoning — into a single system with a router that decides per request how much thinking a question deserves. It launched simultaneously in mini, nano, and Pro variants and became the default for ChatGPT's hundreds of millions of users, including the free tier.

The launch drew a famously mixed reception: benchmark gains over o3 were real but incremental, and the router initially frustrated users who wanted explicit model control. OpenAI iterated quickly — GPT-5.1 in November 2025 reworked the model's personality and adaptive reasoning, and the GPT-5.x line carried OpenAI's flagship branding for the next ten months, through GPT-5.6, until the GPT-6 generation opened with Astra in September 2026.

## Questions and answers

### When was GPT-5 released?

GPT-5 was released by OpenAI on Thursday, Aug 7 2025.

### Who made GPT-5?

GPT-5 was built by OpenAI. Creators of ChatGPT and the GPT series of models. Pioneered large-scale language model research.

### How much does GPT-5 cost?

GPT-5 costs $1.25 per million input tokens and $10.00 per million output tokens through the OpenAI API. Cached input is $0.125 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 get?

GPT-5 reports 1 tracked benchmark score — BullshitBench v2: 21%. Scores are the figures published at release by OpenAI.

### Is GPT-5 open source?

No. GPT-5 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?

OpenAI's previous tracked release was gpt-oss-20b on Aug 5 2025, 2 days earlier. It was followed by GPT-5 mini on Aug 7 2025.


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Canonical page: https://aireleasetracker.com/model/openai/gpt-5
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.