---
title: "🦄 kai chen (@kaichen)"
description: "Rank #222 of 2499 on the Paradev leaderboard, tier 2."
canonical: https://paradev.com/kaichen
last-updated: 2026-10-26
---

# 🦄 kai chen (@kaichen)

Rank #222 of 2499 on the Paradev leaderboard, tier 2.

URL: https://paradev.com/kaichen

## Standing

- Rank: #222 of 2499
- Tier: Operator
- Tokens: 62.45B all time
- Cost: $29461.60 API-equivalent
- Sessions: 3390
- Tracking: 2026-08-01 to 2026-10-25

## Links

- X: https://x.com/kaichensf
- Site: https://10xsoftware.engineer/

## How this tier was reached

Tier is a weighted score across the axes measured for you, so a strong axis offsets a weak one. Plant Manager 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 | 3.5 | 5.5 | no | agents running at once |
| depth | 28.5M | 23.3M | yes | tokens per session |
| sustain | 30 | 24 | yes | active days in the last 30 |

## Achievements

- **plant-floor** (level 1 of 3) at 10, earned 2026-10-22
- **run-01**, earned 2026-10-22
- **thirty** (level 1 of 3) at 30, earned 2026-10-22
- **two-hands** (level 2 of 3) at 30, earned 2026-10-22
- **whole-task** (level 2 of 3) at 10.0M, earned 2026-10-22

## Milestones

- sessions: 1.0K
- spend: 10.0K
- tokens: 10.00B

## Contributions

- Active days in the last year: 82
- Busiest day: 2026-10-04 at 3.65B tokens

## Models

| Provider | Model | Tokens | Cost |
| --- | --- | --- | --- |
| claude | claude-opus-5-5 | 35.27B | $12809.43 |
| claude | claude-opus-5 | 12.62B | $10222.19 |
| devin | swe-2-max | 3.49B | $59.96 |
| claude | claude-fable-5-1 | 2.33B | $2375.72 |
| claude | claude-sonnet-5-5 | 2.22B | $656.85 |
| devin | swe-2-high | 1.46B | $24.10 |
| devin | swe-2-medium | 1.01B | $15.74 |
| claude | claude-sonnet-5 | 911.6M | $340.65 |

## Token breakdown

- Uncached input: 319.0M
- Cached input: 60.56B
- Cache write 5m: 859.2M
- Cache write 1h: 532.0M
- Output: 171.3M
- Reasoning output: 39.4M

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