---
title: "Bartosz Rosiak (@rosiu)"
description: "Rank #2045 of 2504 on the Paradev leaderboard, tier 1."
canonical: https://paradev.com/rosiu
last-updated: 2026-10-26
---

# Bartosz Rosiak (@rosiu)

Rank #2045 of 2504 on the Paradev leaderboard, tier 1.

URL: https://paradev.com/rosiu

## Standing

- Rank: #2045 of 2504
- Tier: Button pusher
- Tokens: 2.12B all time
- Cost: $1189.39 API-equivalent
- Sessions: 256
- Tracking: 2026-08-08 to 2026-10-26

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

| Axis | Current | Needed | Met | Measures |
| --- | --- | --- | --- | --- |
| width | 1.0 | 3.1 | no | agents running at once |
| depth | 4.6M | 10.4M | no | tokens per session |
| sustain | 13 | 17 | no | active days in the last 30 |
| cost | $252.87 | <= $315.60 | yes | USD per merged PR, lower is better |

## Achievements

- **efficient** (level 1 of 3) at $750, earned 2026-09-07
- **ship-it** (level 1 of 4) at 1, earned 2026-09-07
- **whole-task** (level 1 of 3) at 2.5M, earned 2026-09-07

## Milestones

- sessions: 100
- spend: 100
- tokens: 100.0M

## Contributions

- Active days in the last year: 36
- Busiest day: 2026-08-11 at 208.6M tokens

## Models

| Provider | Model | Tokens | Cost |
| --- | --- | --- | --- |
| claude | claude-opus-5 | 607.6M | $427.72 |
| claude | claude-opus-5-5 | 524.4M | $319.21 |
| codex | gpt-5.6-sol | 364.1M | $243.16 |
| claude | claude-sonnet-5 | 220.9M | $69.77 |
| codex | gpt-5.6-terra | 98.7M | $32.42 |
| codex | gpt-6-sol | 92.7M | $2.48 |
| codex | codex-auto-review | 89.3M | $3.91 |
| codex | gpt-6.1-sol | 42.8M | $2.36 |

## Token breakdown

- Uncached input: 33.4M
- Cached input: 2.06B
- Cache write 5m: 3.8M
- Cache write 1h: 17.9M
- Output: 6.8M
- Reasoning output: 1.8M

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