The confusion doesn't stop at the model name. Models are updated over time, prices are lowered, and models may be announced or have preview periods long before they reach general availability.
The archives of Simon Willison's Weblog and the history of his LLM Prices were incredibly helpful in trying to find release dates and price on release.
Arena Score is the LMArena Score for the model as of 4/15/2025. If multiple versions were present, I opted for the oldest (ie. closest to original release) model. For example, "GPT-3.5 Turbo" is the gpt-3.5-turbo-1106 score.