GPT-5.3-Codex vs Kimi K3for coding

```ts
type RetryOptions = {
  maxAttempts: number;
  baseDelayMs?: number;
  maxDelayMs?: number;
  jitterRatio?: number; // 0.2 => ±20%
};

export async function retryWithBackoff<T>(
  op: () => Promise<T>,
  { maxAttempts, baseDelayMs = 200, maxDelayMs = 10_000, jitterRatio = 0.2 }: RetryOptions
): Promise<T> {
  for (let attempt = 1; attempt <= maxAttempts; attempt++) {
    try {
      return await op();
    } catch (err: any) {
      const status = err?.status ?? err?.response?.status;
      const nonRetriable4xx = status >= 400 && status <…

```typescript
export async function withRetry<T>(
  task: () => Promise<T>,
  maxAttempts = 5,
  baseDelayMs = 200,
): Promise<T> {
  for (let attempt = 1; ; attempt++) {
    try {
      return await task();
    } catch (raw) {
      const e = raw as { status?: number; response?: { status?: number } };
      const status = e.status ?? e.response?.status; // fetch-style or axios-style
      const fourxx = status !== undefined && status >= 400 && status < 500;
      if ((fourxx && status !== 429) || attempt >= maxAttempts) throw raw;
      const…