Claude Code

Anthropic's Claude platform directly aligns with all must-have features. It offers conversational AI through its Claude models, provides extensive API access for developers, and emphasizes safety and alignment in its architecture. While not explicitly detailed as 'fine-tuning' in the traditional sense, the ability to provide custom system prompts and context for tailored performance aligns with the spirit of custom models. Enterprise solutions are clearly offered through integrations with Amazon Bedrock and Google Vertex AI, along with security and compliance features. Additionally, it offers code generation capabilities through Claude Code and supports multimodal AI, including vision capabilities.