On Monday, OpenAI introduced the GPT-4.1 family of AI models, which includes GPT‑4.1, GPT‑4.1 Mini, and GPT‑4.1 Nano. These models will be available to developers in application programming interface (API) format. The company claims that the GPT-4.1 models “outperform GPT‑4o and GPT‑4o Mini across the board,” with major improvements in coding capabilities and a longer context window of up to 1 million tokens, with a knowledge cutoff of June 2024.
“GPT-4.1 (and Mini and Nano) are now available in the API! These models are great at coding, instruction following, and long context (1 million tokens). Benchmarks are strong, but we focused on real-world utility, and developers seem very happy. The GPT-4.1 family is API-only,” wrote OpenAI CEO Sam Altman in an X post on Monday.
GPT-4.1 (and -mini and -nano) are now available in the API!
these models are great at coding, instruction following, and long context (1 million tokens).
benchmarks are strong, but we focused on real-world utility, and developers seem very happy.
GPT-4.1 family is API-only.
— Sam Altman (@sama) April 14, 2025
“We’re bringing the latest GPT-4.1 models from OpenAI to Foundry, representing significant advancements in coding, instruction following, and long-context processing. Big upgrades for devs building with AI,” Microsoft CEO Satya Nadella wrote in an X post on Monday.
We’re bringing the latest GPT-4.1 models from OpenAI to Foundry, representing significant advancements in coding, instruction following, and long-context processing. Big upgrades for devs building with AI. https://t.co/uTNdUg2Izr
— Satya Nadella (@satyanadella) April 14, 2025
These models will not be available via ChatGPT and will be accessible only through the API. However, GPT-4o-powered ChatGPT will gradually gain some of these new capabilities. Microsoft has also announced that the GPT-4.1 models will be available to developers via the Azure OpenAI Service.
Compared to GPT-4o, the GPT-4.1 family of AI models is 26 per cent less expensive. GPT-4.1 Nano, in particular, will cost $0.10 for one million input tokens, $0.025 for cached input, and $0.40 for one million output tokens.
| Model (Prices are per 1M tokens) |
Input | Cached input | Output | Blended Pricing* |
| gpt-4.1 | $2.00 | $0.50 | $8.00 | $1.84 |
| gpt-4.1-mini | $0.40 | $0.10 | $1.60 | $0.42 |
| gpt-4.1-nano | $0.10 | $0.025 | $0.40 | $0.12 |
OpenAI claims that these models have been trained with a focus on real-world performance and are said to offer “exceptional performance at a lower cost” — especially GPT-4.1 Nano, the company’s “fastest and cheapest model” to date.
With this announcement, OpenAI has also confirmed the deprecation of GPT‑4.5 Preview in the API, as GPT-4.1 offers similar or better performance at a lower cost and with reduced latency.
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