---
title: "Robert Zhang (@robert)"
description: "Rank #2214 of 2503 on the Paradev leaderboard, tier 1."
canonical: https://paradev.com/robert
last-updated: 2026-10-26
---

# Robert Zhang (@robert)

Rank #2214 of 2503 on the Paradev leaderboard, tier 1.

URL: https://paradev.com/robert

## Standing

- Rank: #2214 of 2503
- Tier: Button pusher
- Tokens: 1.12B all time
- Cost: $1374.73 API-equivalent
- Sessions: 219
- Tracking: 2026-08-10 to 2026-10-05

## 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 | 1.0 | 3.1 | no | agents running at once |
| depth | 4.4M | 10.4M | no | tokens per session |
| sustain | 20 | 17 | yes | active days in the last 30 |

## Milestones

- tokens: 10.0M

## Contributions

- Active days in the last year: 32
- Busiest day: 2026-09-21 at 229.0M tokens

## Models

| Provider | Model | Tokens | Cost |
| --- | --- | --- | --- |
| claude | claude-fable-5 | 648.0M | $1122.48 |
| claude | claude-sonnet-5 | 155.4M | $64.50 |
| claude | claude-opus-5-5 | 143.2M | $110.11 |
| claude | claude-sonnet-5-5 | 29.7M | $19.89 |
| codex | bedrock_mantle/openai.gpt-5.6-luna | 29.4M | $1.15 |
| claude | claude-opus-5 | 24.4M | $22.31 |
| codex | bedrock_mantle/openai.gpt-5.6-terra | 23.1M | $0.85 |
| claude | claude-opus-4-8 | 22.3M | $19.67 |

## Token breakdown

- Uncached input: 4.0M
- Cached input: 1.06B
- Cache write 5m: 26.7M
- Cache write 1h: 26.1M
- Output: 4.1M
- Reasoning output: 870.3K

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