GPT-5.5 vs Qwen3.7 Maxfor coding

```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…

```typescript
async function retry<T>(fn: () => Promise<T>, maxAttempts: number): Promise<T> {
  let lastError: any;
  for (let i = 0; i < maxAttempts; i++) {
    try { return await fn(); }
    catch (e: any) {
      lastError = e;
      const s = e?.status ?? e?.response?.status;
      if (s >= 400 && s < 500 && s !== 429) throw e;
      if (i === maxAttempts - 1) break;
      const delay = Math.min(10000, 100 * 2 ** i * (0.5 + Math.random()));
      await new Promise(r => setTimeout(r, delay));
    }
  }
  throw lastError;
}
```
**Final failu…