Best Multi-LLM Chat Apps

Apps that enable the use of multiple AI models offer unified interfaces for accessing large language models, image generators, and other AI capabilities from providers like OpenAI, Google, and Anthropic. Primary use cases include software development, A/B testing of model outputs, and automated routing to optimal models. Covers API-based platforms and SaaS dashboards, excluding single-model APIs and local deployment tools. Selection criteria include variety of supported models, per-token costs, and rate limits.