One Platform.
Every Frontier Model.

const fib = (n: number, 
  memo = new Map<number, 
  number>()): number => {
  if (n <= 1) return n;
  if (memo.has(n)) 
    return memo.get(n)!;
  const result = fib(n-1, memo) 
    + fib(n-2, memo);
  memo.set(n, result);
  return result;
};

function fibonacci(
  n: number, 
  cache: Record<number, number> 
  = {}
): number {
  if (n in cache) return cache[n];
  if (n < 2) return n;
  return cache[n] = 
    fibonacci(n-1, cache) + 
    fibonacci(n-2, cache);
}