---
title: "The wire — material changes, dated · Undominated.ai"
canonical: https://undominated.ai/wire/
description: "44 material changes to the model index in the 7 days to 2026-09-19. Frontier movement, price moves at or over 5%, context changes, corrections. Not launch news."
---

# The wire — material changes, dated · Undominated.ai

> 44 material changes to the model index in the 7 days to 2026-09-19. Frontier movement, price moves at or over 5%, context changes, corrections. Not launch news.

# The wire

Material changes only, each carrying the date it was observed and the condition the figure holds under. Frontier movement, price moves at or over 5% on the balanced workload blend, advertised context changes, and published corrections. A new model listing is not a wire event, and neither is anything we merely have an opinion about.

44 material changes

In the 7 days to 2026-09-19 (from 2026-09-13), counted from the events below rather than stamped on the page.

## What is not here, and why

 - No frontier movement is published for 2026-08-25 → 2026-08-26. The ranked board changed by 62% between those two snapshots — 56 slugs entered the ranked set and 44 left, of a 162-slug union — which is over the 20% ceiling this wire treats as a definition change rather than a market move. The frontier is a Pareto set over that board, so it moves when the board does. Price movement is unaffected: a per-model price delta does not depend on who else is ranked.
- 13 corrections in docs/EMPIRICAL-GROUNDING.md carry no date stamp and are therefore not in the wire. An entry with no date cannot be placed on a timeline. The log itself is complete; this feed is the incomplete view of it.

## 2026-09-19

frontier join

### Z.ai: GLM 5.3 joined the frontier

1475.1 on LMArena at $1.40/M on 2026-09-19, against 1475.1 at $2.15/M on 2026-09-15. Model: z-ai/glm-5.3.

Default board: standard delivery, not retired, LMArena general axis, balanced-workload blend. Rank snapshots 2026-09-15 → 2026-09-19.

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