---
title: "Jiajie Xu (@jj)"
description: "Rank #1713 of 2501 on the Paradev leaderboard, tier 1."
canonical: https://paradev.com/jj
last-updated: 2026-10-26
---

# Jiajie Xu (@jj)

Rank #1713 of 2501 on the Paradev leaderboard, tier 1.

URL: https://paradev.com/jj

## Standing

- Rank: #1713 of 2501
- Tier: Button pusher
- Tokens: 4.60B all time
- Cost: $5344.20 API-equivalent
- Sessions: 460
- Tracking: 2026-09-04 to 2026-10-02

## How this tier was reached

Tier is a weighted score across the axes measured for you, so a strong axis offsets a weak one. Operator needs a higher combined score, and cost also caps the tier on its own.
Scored on 3 axes, measured over the trailing 30 days.

| Axis | Current | Needed | Met | Measures |
| --- | --- | --- | --- | --- |
| width | 2.0 | 3.1 | no | agents running at once |
| depth | 8.5M | 10.4M | no | tokens per session |
| sustain | 24 | 17 | yes | active days in the last 30 |

## Milestones

- sessions: 100
- spend: 1.0K
- tokens: 1.00B

## Contributions

- Active days in the last year: 24
- Busiest day: 2026-09-06 at 618.5M tokens

## Models

| Provider | Model | Tokens | Cost |
| --- | --- | --- | --- |
| codex | gpt-6-astra | 2.87B | $3938.62 |
| claude | claude-fable-5-1 | 924.7M | $1061.33 |
| claude | claude-opus-5-5 | 292.2M | $120.00 |
| codex | gpt-5.6-sol | 237.9M | $137.16 |
| codex | gpt-5.6-luna | 181.0M | $5.67 |
| codex | gpt-6-sol | 51.7M | $14.42 |
| claude | claude-opus-5 | 41.0M | $66.89 |
| codex | codex-auto-review | 1.4M | $0.08 |

## Token breakdown

- Uncached input: 92.2M
- Cached input: 4.45B
- Cache write 5m: 20.0M
- Cache write 1h: 23.7M
- Output: 16.8M
- Reasoning output: 4.2M

Published voluntarily by the account holder. Source: https://paradev.com/jj