---
id: change/bcapps/11375
type: change
title: "#11375 Obsolete GPT-5.5 chat and add GPT-5.6 Ceres deployments"
summary: GPT-5.5 chat deployment getters in AOAI Deployments are marked obsolete because those deployments retire on 11 September 2026. New GPT-5.6 Ceres latest and preview getters are added, and Sales Order Agent attachment extraction and item search now use them.
tier: official
language: en
tags:
  - obsoletion
  - main
  - bc30
  - codeunit soa attachment mllm
  - codeunit soa broader item search
  - codeunit soa item selector
  - codeunit aoai deployments
  - codeunit aoai deployments impl
  - codeunit aoai chat messages impl
system: copilot
review:
  state: reviewed
  by: opus
  at: "2026-10-08T02:03:54.058Z"
  flags: []
generated:
  at: "2026-10-08T01:26:53.141Z"
  pipeline: 0.2.0
  prompts:
    extract-change: 1
  input_hash: 4abbb8ff848cdcb4e1187fc7a3e2da0612dd0d2b
evidence:
  - kind: code
    url: https://github.com/microsoft/BCApps/pull/11375
    title: "microsoft/BCApps#11375: Obsolete GPT-5.5 chat and add GPT-5.6 Ceres deployments"
    date: "2026-09-23"
    commit: 4abbb8ff848cdcb4e1187fc7a3e2da0612dd0d2b
    t: null
    quote: null
links:
  learn: []
  objects:
    - object/codeunit/4421
    - object/codeunit/4596
    - object/codeunit/4417
    - object/codeunit/7768
    - object/codeunit/7769
    - object/codeunit/7764
  features: []
  topics: []
  localizations: []
  videos: []
  posts: []
  guidelines: []
  changes: []
number: 11375
repo: microsoft/BCApps
source_id: bcapps-prs
url: https://github.com/microsoft/BCApps/pull/11375
kind: pr
base_branch: main
major: "30"
merged_at: "2026-09-23T11:38:41Z"
author: darjoo
author_type: User
community_contribution: false
labels:
  - "AL: Apps (W1)"
  - "AL: System Application"
  - "Ownership: Needs Review"
  - "Team: Other"
change_class: code
change_kind: obsoletion
behavior_change: true
breaking: false
files:
  count: 8
  additions: 162
  deletions: 8
  al: 6
apps:
  - SalesOrderAgent
  - System Application
objects_touched:
  - key: codeunit/4421
    page: codeunit/4421
    type: codeunit
    id: 4421
    name: SOA Attachment MLLM
    app: SalesOrderAgent
    status: modified
  - key: codeunit/4596
    page: codeunit/4596
    type: codeunit
    id: 4596
    name: SOA Broader Item Search
    app: SalesOrderAgent
    status: modified
  - key: codeunit/4417
    page: codeunit/4417
    type: codeunit
    id: 4417
    name: SOA Item Selector
    app: SalesOrderAgent
    status: modified
  - key: codeunit/7768
    page: codeunit/7768
    type: codeunit
    id: 7768
    name: AOAI Deployments
    app: System Application
    status: modified
  - key: codeunit/7769
    page: codeunit/7769
    type: codeunit
    id: 7769
    name: AOAI Deployments Impl
    app: System Application
    status: modified
  - key: codeunit/7764
    page: codeunit/7764
    type: codeunit
    id: 7764
    name: AOAI Chat Messages Impl
    app: System Application
    status: modified
objects_unjoined: []
obsoletions:
  - object: AOAI Deployments
    member: GetGPT55ChatLatest()
    replacement: GetGPT56CeresLatest()
  - object: AOAI Deployments
    member: GetGPT55ChatPreview()
    replacement: GetGPT56CeresPreview()
backports:
  - number: 11772
    base: releases/29.x
    url: https://github.com/microsoft/BCApps/pull/11772
fixes_issues: []
work_items:
  - 650712
systems:
  - copilot
  - development
quote: null
joined_against:
  major: "30"
  commit: ecbc028c25dbe83b61313bc566e6c1d41184bb1c
---

# #11375 Obsolete GPT-5.5 chat and add GPT-5.6 Ceres deployments

> GPT-5.5 chat deployment getters in AOAI Deployments are marked obsolete because those deployments retire on 11 September 2026. New GPT-5.6 Ceres latest and preview getters are added, and Sales Order Agent attachment extraction and item search now use them.

[Pull request](https://github.com/microsoft/BCApps/pull/11375) · merged into `main` (BC30) on 2026-09-23 by darjoo · 8 files (+162 -8), 6 AL · obsoletion · tier official · reviewed (checked by Opus)

## What changed

- GetGPT55ChatLatest() and GetGPT55ChatPreview() methods marked obsolete in version 30.0 with retirement telemetry
- New GetGPT56CeresLatest() and GetGPT56CeresPreview() methods added returning gpt-56-ceres deployment models
- Sales Order Agent attachment extraction and item search callers migrated to GPT-5.6 Ceres deployments
- GPT-5.5 preview retained for file-content compatibility until cleanup, GPT-5.6 preview enabled for file-content messages
- Five AL tests added covering deployment names, obsolete method retention, file-content preview support, and unsupported model rejection
- Behaviour changes for users or extensions.

## AL objects touched

- [Codeunit 4421 "SOA Attachment MLLM"](../../objects/codeunit/4421.md), SalesOrderAgent: modified
- [Codeunit 4596 "SOA Broader Item Search"](../../objects/codeunit/4596.md), SalesOrderAgent: modified
- [Codeunit 4417 "SOA Item Selector"](../../objects/codeunit/4417.md), SalesOrderAgent: modified
- [Codeunit 7768 "AOAI Deployments"](../../objects/codeunit/7768.md), System Application: modified
- [Codeunit 7769 "AOAI Deployments Impl"](../../objects/codeunit/7769.md), System Application: modified
- [Codeunit 7764 "AOAI Chat Messages Impl"](../../objects/codeunit/7764.md), System Application: modified

## Obsoletions

- AOAI Deployments: GetGPT55ChatLatest(), replaced by GetGPT56CeresLatest()
- AOAI Deployments: GetGPT55ChatPreview(), replaced by GetGPT56CeresPreview()

## Also merged into

- [#11772](https://github.com/microsoft/BCApps/pull/11772) into `releases/29.x` on 2026-09-30

## Context

- Work items: AB#650712
- Labels: AL: Apps (W1), AL: System Application, Ownership: Needs Review, Team: Other
- Systems: copilot, development

Source: metadata of a merged pull request in microsoft/BCApps (bcapps): title, labels, changed paths and counts, with a summary in our words. No source text and no description beyond one short quote (D10, D61).