French startup Mistral AI plans to open-source a GPT-4-level model in 2024, having recently secured $415 million in funding and launched an API service. The company is developing the multilingual model Mistral Medium, which has been garnering industry attention. Meanwhile, rumors of OpenAI potentially releasing GPT-4.5 are circulating, making 2024 an exciting and competitive year in the field of open-source large language models.