---
title: "Chai Bittan (@chai1310b)"
description: "Rank #866 of 2501 on the Paradev leaderboard, tier 1."
canonical: https://paradev.com/chai1310b
last-updated: 2026-10-26
---

# Chai Bittan (@chai1310b)

Rank #866 of 2501 on the Paradev leaderboard, tier 1.

URL: https://paradev.com/chai1310b

## Standing

- Rank: #866 of 2501
- Tier: Button pusher
- Tokens: 17.56B all time
- Cost: $13388.58 API-equivalent
- Sessions: 868
- Tracking: 2026-08-12 to 2026-09-22

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

| Axis | Current | Needed | Met | Measures |
| --- | --- | --- | --- | --- |
| width | 2.3 | 3.1 | no | agents running at once |
| depth | 18.7M | 10.4M | yes | tokens per session |
| output | 2.0 | 2.1 | no | agent PRs merged per week |
| sustain | 22 | 17 | yes | active days in the last 30 |
| cost | $1661.60 | <= $315.60 | 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: 1.00B

## Contributions

- Active days in the last year: 24
- Busiest day: 2026-09-17 at 2.16B tokens

## Models

| Provider | Model | Tokens | Cost |
| --- | --- | --- | --- |
| claude | claude-opus-5 | 13.08B | $8476.23 |
| claude | claude-fable-5-1 | 2.37B | $1851.77 |
| claude | claude-fable-5 | 1.34B | $2206.87 |
| codex | gpt-6-astra | 480.8M | $761.29 |
| claude | claude-sonnet-5 | 195.7M | $55.98 |
| codex | codex-auto-review | 54.5M | $3.00 |
| codex | gpt-5.6-sol | 17.4M | $16.71 |
| claude | claude-opus-4-8 | 16.4M | $14.73 |

## Token breakdown

- Uncached input: 34.5M
- Cached input: 17.15B
- Cache write 5m: 241.4M
- Cache write 1h: 109.3M
- Output: 26.6M
- Reasoning output: 7.2M

Published voluntarily by the account holder. Source: https://paradev.com/chai1310b