When was GPT-4.1 released?

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

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 August 18, 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.

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.

GPT-4.1

Released Apr 14 2025

GPT-4.1 is an AI model released by OpenAI on Monday, Apr 14 2025, 26 days after o1-pro. Benchmark results (shown below) cover BullshitBench v2, and SWE-Bench Verified.

API pricing

Input: $2.00
Cached input: $0.50
Output: $8.00

USD per 1M tokens

Available from


Azure	—	$2.00	$8.00	1M
OpenAI	—	$2.00	$8.00	1M
Azure	swedencentral	$2.20	$8.80	1M

USD per 1M tokens

Benchmarks

Coding

SWE-Bench Verifiedvia BenchLM

54.6%

#50 of 57

Robustness

BullshitBench v2

14%

#70 of 84

Source: BenchLM, retrieved 31 August 2026. Other sources are identified on the linked benchmark pages.

Compare GPT-4.1 with

GPT-4.1

Suggested comparisons

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Frequently asked questions

: GPT-4.1 was released by OpenAI on Monday, Apr 14 2025.
: GPT-4.1 was built by OpenAI. Creators of ChatGPT and the GPT series of models. Pioneered large-scale language model research.
: 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 August 18, 2026.
: 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.
: 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.
: 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.