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.
Topic
Model Deprecation
19 posts about Model Deprecation from Simon Carter.
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.
Developer Tools & APIs
Two OpenAI shutdowns land on 26 August 2026: o3 leaves ChatGPT and the Assistants API is gone for good
On 26 August 2026, OpenAI removes o3 from ChatGPT's model picker and permanently shuts down the Assistants API. Here's what breaks and what to do.
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.
Cloud & Infrastructure
Google postpones removal of Gemini 3.5 Flash from global region in Gemini Enterprise app
Google has reversed its 4 August 2026 deadline to remove Gemini 3.5 Flash from the global-region endpoint. No new date has been set.
Models & Assistants
OpenAI is retiring o3 from ChatGPT on 26 August 2026
OpenAI has set 26 August 2026 as the hard retirement date for o3 in ChatGPT, following a 90-day sunset period announced on 28 May 2026.
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.
Workplace AI
Gemini 3.5 Flash removed from the global-region endpoint in Gemini Enterprise from 4 August 2026
From 4 August 2026, gemini-3.5-flash is no longer available in the global-region endpoint of the Gemini Enterprise app. Here's what to check.
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
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.
Models & Assistants
OpenAI is retiring GPT-4.5 and o3 from ChatGPT — here's what changes and when
GPT-4.5 leaves ChatGPT on June 27, 2026 and o3 on August 26. No API changes. Here's what it means for you.
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.
Models & Assistants
GPT-5.2 Is Gone from ChatGPT — What the New 90-Day Sunset Policy Means for You
As of June 12, 2026, GPT-5.2 Instant, Thinking, and Pro are retired from ChatGPT, with all conversations auto-migrated to GPT-5.5 equivalents.