---
title: "Jan Czalbowski (@czalbia)"
description: "Rank #566 of 2498 on the Paradev leaderboard, tier 2."
canonical: https://paradev.com/czalbia
last-updated: 2026-10-26
---

# Jan Czalbowski (@czalbia)

Rank #566 of 2498 on the Paradev leaderboard, tier 2.

URL: https://paradev.com/czalbia

## Standing

- Rank: #566 of 2498
- Tier: Operator
- Tokens: 28.92B all time
- Cost: $16593.69 API-equivalent
- Sessions: 1782
- Tracking: 2026-08-04 to 2026-10-20

## 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 5 axes, measured over the trailing 30 days.

| Axis | Current | Needed | Met | Measures |
| --- | --- | --- | --- | --- |
| width | 2.0 | 5.5 | no | agents running at once |
| depth | 9.7M | 23.3M | no | tokens per session |
| output | 4.5 | 6.0 | no | agent PRs merged per week |
| sustain | 30 | 24 | yes | active days in the last 30 |
| cost | $264.01 | <= $104.48 | no | USD per merged PR, lower is better |

## Achievements

- **ship-it** (level 1 of 4) at 1, earned 2026-09-08
- **whole-task** (level 2 of 3) at 10.0M, earned 2026-09-08

## Milestones

- sessions: 100
- spend: 1.0K
- tokens: 10.00B

## Contributions

- Active days in the last year: 72
- Busiest day: 2026-08-07 at 2.22B tokens

## Models

| Provider | Model | Tokens | Cost |
| --- | --- | --- | --- |
| claude | claude-opus-5-5 | 10.94B | $4288.30 |
| codex | gpt-5.6-sol | 10.68B | $6588.09 |
| codex | gpt-6-astra | 2.23B | $3018.69 |
| claude | claude-sonnet-5 | 1.54B | $378.64 |
| claude | claude-fable-5-1 | 1.33B | $1197.67 |
| claude | claude-opus-5 | 855.9M | $611.62 |
| codex | gpt-6.1-sol | 524.7M | $93.12 |
| grok | grok-4.6 | 185.0M | $58.82 |

## Token breakdown

- Uncached input: 430.9M
- Cached input: 28.11B
- Cache write 5m: 171.4M
- Cache write 1h: 137.4M
- Output: 70.6M
- Reasoning output: 20.2M

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