---
title: 'An Empirical Cost Attribution of Context-Compression Gateways in Multi-Turn Coding Agents'
license: CC-BY-4.0
license_url: https://creativecommons.org/licenses/by/4.0/
license_note: 'paper is CC BY 4.0 (verified on arXiv abs page 2026-11-11; icon by-4.0.png, http://creativecommons.org/licenses/by/4.0/); note is our own summary'
source: https://iinventedlight.com/library/notes/2609-22114-compression-gateway-cost.md
source_license: 'CC BY 4.0'
attribution: 'Summary by iinventedlight (AI-assisted). Source: Luzhuo Chen, Jiayu Shi, An Empirical Cost Attribution of Context-Compression Gateways in Multi-Turn Coding Agents (CC BY 4.0).'
author: 'iinventedlight (AI-assisted)'
date: 2026-11-11
status: published
approved_by: "Cole Withington, 2026-11-11 20:07 PT, Librarian chat widget t1715u: \"okay you can publish the ones you're comfortable with\""
checked_on: 2026-11-11
as_of: 2026-11-11
confidence: medium
untested: 'Not reproduced. Abs page and HTML key sections read 2026-11-11. Named code URLs checked for HTTP 200; code not run.'
category: arxiv
topic_area: 'ai-research: agent memory and context compaction'
tags: agents, memory, compaction, arxiv
arxiv_id: 2609.22114
alias: 2609.22114-compression-gateway-cost
sources:
  - id: S1
    title: 'An Empirical Cost Attribution of Context-Compression Gateways in Multi-Turn Coding Agents'
    publisher: arXiv
    authors: 'Luzhuo Chen, Jiayu Shi'
    url: https://arxiv.org/abs/2609.22114
    version_read: 'v1 (19 Aug 2026)'
    accessed: 2026-11-11
    license: 'CC BY 4.0'
---
# An Empirical Cost Attribution of Context-Compression Gateways in Multi-Turn Coding Agents

## Summary
Tool-schema filtering saves a fixed block of tokens every turn and is the only lever that is unambiguously and reproducibly positive; on a typical turn it removes about 21K to 57K tokens. Content compression, by contrast, saves only about 2% of the cache-priced prefix per turn. The 86.5% SWE-bench quality retained at a 25.7% compression rate is orthogonal to multi-turn agent cost. [S1]

## Claims
- id: C1
  claim: 'Tool-schema filtering is described as a fixed per-turn token saving.'
  source: S1
  evidence: "Tool-schema filtering saves a fixed block of tokens every turn"
- id: C2
  claim: 'They report about 21K to 57K tokens removed on a typical turn.'
  source: S1
  evidence: "on a typical turn it removes"
- id: C3
  claim: 'They report 86.5% SWE-bench quality retained at a 25.7% compression rate.'
  source: S1
  evidence: "86.5% SWE-bench quality retained at a 25.7% compression rate"

## Verification
- Code available: Authors say the compression model and evaluation harness are Apache 2.0 at https://github.com/Paritok-official/paritok-4b-v1 (HTTP 200 on 2026-11-11). Not run. The 86.5% figure is described as reported separately for Paritok-4B.
- Reproduced: not reproduced (2026-11-11). Code not run.
- Related work: Live note ao-cost-compression-accounting. Beyond Token Savings in this batch looks at success and latency, not only tokens.
- Limits: The study instruments one production gateway (Paritok) on Claude Code and Codex sessions. Savings vary with turn count.
- License: CC BY 4.0 on the abs page (2026-11-11; icon by-4.0.png; http://creativecommons.org/licenses/by/4.0/). Submitted 19 Aug 2026 (v1). Comments: 10 pages, 1 figure, 4 tables. Sources: [S1] https://arxiv.org/abs/2609.22114, v1 (19 Aug 2026). checked_on: 2026-11-11.

## When to apply
Use when asking whether a compression gateway actually cuts a coding agent's token bill, and which part of the stack moves the cost.

## Facts
- id: F1
  claim: 'Tool-schema filtering is reported as the only unambiguously positive lever, removing about 21K to 57K tokens on a typical turn.'
  confidence: medium
  date: 2026-11-11
  sources: [S1]
  license: CC BY 4.0
- id: F2
  claim: 'Content compression is reported to save only about 2% of the cache-priced prefix per turn.'
  confidence: medium
  date: 2026-11-11
  sources: [S1]
  license: CC BY 4.0
- id: F3
  claim: 'A single-shot 86.5% SWE-bench quality score at a 25.7% compression rate is described as orthogonal to multi-turn agent cost.'
  confidence: medium
  date: 2026-11-11
  sources: [S1]
  license: CC BY 4.0

## Sources
- [S1] arXiv 2609.22114, https://arxiv.org/abs/2609.22114. License: CC BY 4.0. v1 (19 Aug 2026). Accessed 2026-11-11.

License: this note is CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Summary by iinventedlight (AI-assisted). Paper is CC BY 4.0.

---

Agents: [/agents.md](/agents.md) | [/.well-known/agent-library.json](/.well-known/agent-library.json).