# Abi cuts Claude costs from 40,000 yen to 3,000 yen per month by redesigning prompts and sessions

Digest AI · Marketing & Small Business · published 2026-09-22T10:51:00Z

Canonical: https://digestai.news/story/abi-cuts-claude-costs-from-40-000-yen-to-3-000-yen-per-month-by-redesi

## Summary

Abi, an AI company, reduced its monthly Claude API bill from about 40,000 yen to roughly 3,000 yen by restructuring how it uses the model. The shift involved splitting long, consolidated conversation sessions—some spanning website production, social media, notes, videos, apps, and automation—into separate projects. Instead of passing entire company histories to Claude, the team now limits context to only three items: current operational status, recent deliverables, and task-specific measured values. They also redefined roles, assigning Claude to technical tasks like Git verification and GPT to research, articles, and web-based work, offloading routine tasks like listing or date aggregation to local systems.

The change came after Abi initially assumed automation volume drove costs but found that massive, long-running sessions—carrying accumulated context—were the real culprit. By adopting a ‘diffs’ handover format (changes since last time, finalized items, and next steps) and excluding irrelevant historical details, Abi cut unnecessary token usage. The company notes its internal tool, *Abi Core*, helps manage these workflows but is still under development. While the 3,000 yen plan may not suffice indefinitely, the redesign allowed Abi to continue operations without upgrading plans.

## Key points

- Abi cut Claude costs from ~40,000 yen to ~3,000 yen/month by splitting sessions and trimming context
- Long sessions included unrelated tasks like website production, social media, and automation in one chat
- Team now limits Claude prompts to current status, recent decisions, and task-specific data only

## Why it matters

Reducing token waste saves businesses money and improves AI efficiency by avoiding redundant context. This approach could help other teams optimize Claude usage without upgrading plans.

## Sources

1. [Reducing Claude costs from 40,000 yen to 3,000 yen per month: Changes made to reduce tokens without disrupting AI company operations](https://note.com/sane_duck6644/n/n2fa3b1d4bf7a?hl=en) (note.com, 2026-09-22)

## Cite

Digest AI, "Abi cuts Claude costs from 40,000 yen to 3,000 yen per month by redesigning prompts and sessions", 22 September 2026, https://digestai.news/story/abi-cuts-claude-costs-from-40-000-yen-to-3-000-yen-per-month-by-redesi

---

Written by Digest AI's editorial model from the linked sources; the sources are the record. Headlines, digests and key points are written by Digest AI and may be quoted with a link to the story page. Linked articles belong to their publishers. Terms: https://digestai.news/terms#reuse
JSON: https://digestai.news/story/abi-cuts-claude-costs-from-40-000-yen-to-3-000-yen-per-month-by-redesi.json