SunsetDiff

SunsetDiff is a free tracker of AI model deprecations. Every 6 hours it checks the official OpenAI, Anthropic, Google Gemini API, Vertex AI, AWS Bedrock, Azure OpenAI and Mistral pages and records when each model shuts down and what the provider names as its replacement. Every value links to its source with a last-checked date. It has migration pages showing the replacement and changes in price, context and parameters, a shutdown calendar with iCal and RSS feeds, a free JSON API, a read-only MCP endpoint, and an open CC BY 4.0 dataset on Hugging Face.