---
title: "Atsumasa Kobayashi (@atsumasa-k)"
description: "Rank #931 of 1137 on the Superset leaderboard, tier 1."
canonical: https://superset.sh/atsumasa-k
last-updated: 2026-09-07
---

# Atsumasa Kobayashi (@atsumasa-k)

Rank #931 of 1137 on the Superset leaderboard, tier 1.

URL: https://superset.sh/atsumasa-k

## Standing

- Rank: #931 of 1137
- Tier: Button pusher
- Tokens: 988.1M all time
- Cost: $1775.48 API-equivalent
- Sessions: 1103
- Tracking: 2026-07-29 to 2026-09-07

## 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 | 486.8K | 10.4M | no | tokens per session |
| sustain | 28 | 17 | yes | active days in the last 30 |

## Achievements

- **thirty** (level 1 of 3) at 30, earned 2026-09-07
- **two-hands** (level 1 of 3) at 10, earned 2026-09-07

## Milestones

- sessions: 1.0K
- spend: 1.0K
- tokens: 100.0M

## Contributions

- Active days in the last year: 39
- Busiest day: 2026-08-28 at 145.3M tokens

## Models

| Provider | Model | Tokens | Cost |
| --- | --- | --- | --- |
| claude | claude-fable-5 | 447.4M | $1206.71 |
| claude | claude-sonnet-5 | 389.4M | $397.83 |
| claude | claude-opus-5 | 68.4M | $76.56 |
| claude | claude-haiku-4-5-20251001 | 53.8M | $21.65 |
| claude | claude-opus-4-7 | 8.0M | $13.66 |
| codex | gpt-5.6-sol | 7.4M | $13.73 |
| claude | claude-fable-5-1 | 7.3M | $36.81 |
| claude | claude-sonnet-4-6 | 6.2M | $5.40 |

## Token breakdown

- Uncached input: 1.3M
- Cached input: 894.5M
- Cache write 5m: 26.2M
- Cache write 1h: 50.8M
- Output: 15.3M
- Reasoning output: 4.9M

Published voluntarily by the account holder. Source: https://superset.sh/atsumasa-k