GLM 5.2 vs GPT-5.5for coding

```typescript
export async function retry(fn: () => Promise<Response>, maxAttempts = 5, baseDelay = 1000): Promise<Response> {
  for (let attempt = 1; attempt <= maxAttempts; attempt++) {
    try {
      const res = await fn();
      if (res.ok) return res;
      // Do not retry on 4xx errors except 429 (Too Many Requests)
      if (res.status >= 400 && res.status < 500 && res.status !== 429) return res;
      if (attempt === maxAttempts) return res;
    } catch (err) {
      if (attempt === maxAttempts) throw err;
    }
    // Exponential back…

```ts
type RetryOptions = { attempts?: number; baseMs?: number; maxMs?: number };

const sleep = (ms: number) => new Promise(r => setTimeout(r, ms));

const statusOf = (x: any): number | undefined =>
  typeof x?.status === "number" ? x.status :
  typeof x?.response?.status === "number" ? x.response.status :
  undefined;

const isNonRetryable4xx = (s?: number) =>
  s !== 429 && s !== undefined && s >= 400 && s < 500;

export async function retry<T>(
  fn: () => Promise<T>,
  { attempts = 5, baseMs = 200, maxMs = 5000 }: RetryOptions = {}
): Prom…