GPT 4.1: The New OpenAI Workhorse

**OpenAI** released **GPT-4.1**, including **GPT-4.1 mini** and **GPT-4.1 nano**, highlighting improvements in **coding**, **instruction following**, and handling **long contexts** up to **1 million tokens**. The model achieves a **54 score on SWE-bench verified** and shows a **60% improvement over GPT-4o** on internal benchmarks. Pricing for **GPT-4.1 nano** is notably low at **$0.10/1M input** and **$0.40/1M output**. **GPT-4.5 Preview** is being deprecated in favor of **GPT-4.1**. Integration support includes **Llama Index** with day 0 support. Some negative feedback was noted for **GPT-4.1 nano**. Additionally, **Perplexity's Sonar API** ties with **Gemini-2.5 Pro** for the top spot in the LM Search Arena leaderboard. New benchmarks like **MRCR** and **GraphWalks** were introduced alongside updated prompting guides and cookbooks.