# GPT-4.1

GPT-4.1 is an AI model released by OpenAI on Apr 14 2025. It has a 1M context window. Tracked results include 14% on BullshitBench v2 and 54.6% on SWE-Bench Verified.

## Facts

| Field | Value |
| --- | --- |
| Model | GPT-4.1 |
| Developer | OpenAI |
| Release date | Monday, Apr 14 2025 |
| Licensing | Closed |
| Context window | 1M |

## API pricing

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

| Tier | Input | Cached input | Output |
| --- | --- | --- | --- |
| All documented contexts | $2.00 | $0.50 | $8.00 |

Verified October 19, 2026 against the first-party source: https://developers.openai.com/api/docs/models/gpt-4.1

## Tracked benchmark scores

| Benchmark | Score | Source | What it measures |
| --- | --- | --- | --- |
| BullshitBench v2 | 14% | [BullshitBench](https://github.com/petergpt/bullshit-benchmark) | 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. |
| SWE-Bench Verified | 54.6% | [BenchLM](https://benchlm.ai), retrieved 2026-08-31 | Real coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. |

## About GPT-4.1

GPT-4.1 launched in the API on April 14, 2025 alongside mini and nano variants. OpenAI focused the release on software engineering, precise instruction following and using long inputs effectively. A context window of roughly one million tokens let developers provide larger codebases or document collections than the earlier GPT-4o generation could accommodate in a request.

OpenAI reported 54.6% on SWE-bench Verified under its published evaluation setup, which omitted tasks that could not run on its infrastructure. The result illustrated improvements in editing repositories, but also depended on prompts and tools. GPT-4.1's launch was specifically an API release; its introduction should not be confused with a simultaneous new model choice for every ChatGPT user.

## Questions and answers

### When was GPT-4.1 released?

GPT-4.1 was released by OpenAI on Monday, Apr 14 2025.

### Who made GPT-4.1?

GPT-4.1 was built by OpenAI. Creators of ChatGPT and the GPT series of models. Pioneered large-scale language model research.

### How much does GPT-4.1 cost?

GPT-4.1 costs $2.00 per million input tokens and $8.00 per million output tokens through the OpenAI API. Cached input is $0.50 per million tokens. Rates are pay-as-you-go API prices verified against OpenAI's published pricing on October 19, 2026.

### What benchmark scores did GPT-4.1 get?

GPT-4.1 reports 2 tracked benchmark scores — BullshitBench v2: 14%; SWE-Bench Verified: 54.6%. Tracked scores may come from lab reports or independent benchmarks; source details accompany the benchmark data.

### What is the context window of GPT-4.1?

GPT-4.1 has a context window of 1M. Providers may specify separate input and output token limits.

### Is GPT-4.1 open source?

No. GPT-4.1 is a closed 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-4.1?

OpenAI's previous tracked release was o1-pro on Mar 19 2025, 26 days earlier. It was followed by GPT-4.1 mini on Apr 14 2025.


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Canonical page: https://aireleasetracker.com/model/openai/gpt-4.1
Site index: https://aireleasetracker.com/llms.txt
Source: AI Release Tracker (https://aireleasetracker.com). Most benchmark scores come from lab launch material; gathered results identify the leaderboard that published them.