Models & Assistants
GPT-5.5 retires from ChatGPT, ChatGPT Work, and Codex on 14 October 2026
OpenAI has set 14 October 2026 as the hard retirement date for GPT-5.5 in ChatGPT, ChatGPT Work, and Codex. The API is unaffected.
Topic
Migration
23 posts about Migration from Simon Carter.
Developer Tools & APIs
Google sets 30 September 2026 deadline to drop gemini-omni-flash-preview
Google deprecates gemini-omni-flash-preview on 30 September 2026. Teams must migrate to the GA gemini-omni-1.1-flash endpoint before that date.
Developer Tools & APIs
Google is shutting down gemini-robotics-er-1.6-preview on 31 August 2026
Google retires gemini-robotics-er-1.6-preview on 31 August 2026. The replacement, gemini-robotics-er-2-preview, adds multi-robot coordination and agentic code execution.
Developer Tools & APIs
GPT-5.4 and GPT-5.4 mini are now retired from Codex for ChatGPT-authenticated users
From 31 August 2026, GPT-5.4 and GPT-5.4 mini no longer work in Codex under ChatGPT sign-in. Here is what to do.
Developer Tools & APIs
Claude 3 Haiku on Vertex AI is now shut down: here's what to do if your app is broken
Anthropic's Claude 3 Haiku on Vertex AI reached end-of-life on 23 August 2026. Any app still calling it will now receive errors.
Workplace AI
Microsoft Whiteboard legacy migration tool retired on 22 August 2026: unmigrated boards will be permanently deleted on 5 September
The Azure-to-OneDrive migration tool closed on 22 August 2026. Unmigrated enterprise whiteboards will be deleted on 5 September 2026.
Developer Tools & APIs
Grok 4.1 Fast models are being shut down on the Gemini Enterprise Agent Platform on 20 August 2026
The xai/grok-4.1-fast-reasoning and xai/grok-4.1-fast-non-reasoning model IDs stop working on 20 August 2026. Here's how to migrate.
Developer Tools & APIs
Gemini image-generation model shutdown: what to do if your app is broken on 17 August 2026
Three Imagen 4 API endpoints shut down permanently on 17 August 2026. Here's what broke, why, and how to migrate to gemini-3.1-flash-image.
Developer Tools & APIs
Anthropic shuts down legacy Claude Workbench and three experimental API endpoints on 17 August 2026
The legacy Claude Workbench and three /v1/experimental/ prompt API endpoints reach end of life on 17 August 2026. Here's what to do.
Developer Tools & APIs
Claude Opus 4.1 is retired: what breaks on 5 August 2026 and how to fix it
The claude-opus-4-1-20250805 model ID retired on 5 August 2026. API calls to it now return a hard 404. Here is what to do.
Developer Tools & APIs
GPT-5.4 and GPT-5.4 mini retire from Codex on 31 August 2026 for ChatGPT users
OpenAI is retiring GPT-5.4 and GPT-5.4 mini from Codex for ChatGPT-authenticated users on 31 August 2026. Here's what to do before the deadline.
Developer Tools & APIs
Claude Opus 4.1 retires on 5 August 2026: migrate to Opus 4.8 now
The claude-opus-4-1-20250805 model ID stops working on 5 August 2026. Here's what to change and why Opus 4.8 is the right target.
Developer Tools & APIs
OpenAI Assistants API is permanently removed on 26 August 2026: here's what you need to do
OpenAI's Assistants API is gone on 26 August 2026. This is a full architectural migration to the Responses API, not a quick endpoint swap.
Developer Tools & APIs
Anthropic is retiring the legacy Claude Workbench and three experimental prompt API endpoints on 17 August 2026
The legacy Workbench and three /v1/experimental/ prompt endpoints shut down 17 August 2026. Here's what to export and what replaces them.
Developer Tools & APIs
Imagen 4 endpoints shut down on 17 August 2026: and the migration is more than a model rename
Imagen 4 model endpoints hard-shut-down 17 August 2026. Migration means switching method, model name, and response parsing.
Developer Tools & APIs
Anthropic is retiring Claude Opus 4.1 on August 5, 2026 — here's what developers need to do
Anthropic has deprecated claude-opus-4-1-20250805 with a retirement date of August 5, 2026. Opus 4.8 is the recommended replacement.
Developer Tools & APIs
Claude Sonnet 4 and Opus 4 are gone from the API — here's what to do
As of June 15, 2026, claude-sonnet-4-20250514 and claude-opus-4-20250514 return errors. Migrate to Sonnet 4.6 and Opus 4.8.
Developer Tools & APIs
claude-mythos-preview Is Deprecated — But Its Replacement Is Currently Unavailable
Anthropic has formally deprecated claude-mythos-preview with a June 30 2026 retirement date, directing developers to migrate to claude-mythos-5 — which is currently suspended.
Developer Tools & APIs
Google is deprecating Veo 2 and Veo 3 on the Gemini API — here's what you need to do before June 30, 2026
Veo 2 and Veo 3 model IDs on the Gemini API are being shut down on June 30, 2026. Migrate to Veo 3.1 Preview or the Enterprise GA models now.
Developer Tools & APIs
Gemini Code Assist and Gemini CLI are shutting down for consumer tiers on June 18, 2026 — here's how to migrate to Antigravity
Google is retiring Gemini Code Assist IDE extensions and Gemini CLI for free, Pro, and Ultra users on June 18, 2026. Migration to Antigravity CLI is required.
Developer Tools & APIs
Codex now imports your Claude Code setup — and it's built right into onboarding
OpenAI's latest Codex update adds guided migration from Claude Code and Claude Cowork, plus a revamped plugins screen with filters and keyboard navigation.
Developer Tools & APIs
Google Extends Gemini 2.5 Retirement on Vertex AI to October 2026
Google has pushed the Vertex AI retirement date for Gemini 2.5 Pro, Flash, and Flash-Lite to October 16, 2026, giving developers more time to migrate to Gemini 3.x.
Developer Tools & APIs
Gemini Interactions API: The June 8 Hard Removal Is Done — Here's What Breaks and How to Fix It
The legacy Gemini Interactions API outputs schema was permanently removed on June 8, 2026. Here's what changed, what's broken, and how to migrate.