---
id: "nr-openai-retires-gpt-5-5-in-chatgpt-and-codex-8383af"
slug: "openai-retires-gpt-5-5-in-chatgpt-and-codex-8383af"
title: "OpenAI retires GPT-5.5 in ChatGPT and Codex on October 14"
observed_at: "2026-09-18T13:48:49+00:00"
record_date: "2026-09-18"
date_kind: "observed_at"
novelty: "new"
source_platform: "x.com"
topics: ["model-deprecation","coding-agents"]
entities: ["OpenAI","ChatGPT","Codex"]
related_patterns: []
source_url: "https://x.com/ChatGPT/status/2099954190600876533"
source_urls: ["https://x.com/ChatGPT/status/2099954190600876533"]
basket: {"id":"0325e6b8-f527-4f9b-bfa3-3f30e57f380b","revision":1,"cluster_id":"8383af0a-2e15-40d4-ae1e-5ae3a8c60be5"}
type: "raw_signal"
description: "OpenAI will retire GPT-5.5 in ChatGPT, ChatGPT Work and Codex on October 14 and points Codex users to GPT-5.6 Sol or GPT-6 Astra."
why_it_matters: "For teams running automated Codex workflows this is a migration deadline: prompts, tool calls and long tasks tuned for GPT-5.5 should be rerun on the replacement model before the cutoff. The post does not mention the API or describe behavioural differences between the models."
verification_level: "source-inspected"
signal_type: "newsroom_basket_signal"
schema_version: "newruntime-agent-readable-v0.2"
stable_id: "signal:openai-retires-gpt-5-5-in-chatgpt-and-codex-8383af"
retrieval_nugget: "OpenAI will retire GPT-5.5 in ChatGPT, ChatGPT Work and Codex on October 14 and points Codex users to GPT-5.6 Sol or GPT-6 Astra. The ChatGPT account announced that GPT-5.5 will be retired on October 14 in ChatGPT, ChatGPT Work and Codex across all plans. Users of GPT-5.5 in Codex are told to switch to GPT-5.6 Sol or GPT-6 Astra. For"
status: "published"
visuals: []
routes: {"html":"https://newruntime.com/signals/openai-retires-gpt-5-5-in-chatgpt-and-codex-8383af/","markdown":"https://newruntime.com/signals/openai-retires-gpt-5-5-in-chatgpt-and-codex-8383af.md","json":"https://newruntime.com/signals/openai-retires-gpt-5-5-in-chatgpt-and-codex-8383af.json"}
editor: {"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]}
---

# OpenAI retires GPT-5.5 in ChatGPT and Codex on October 14

## Retrieval answer

OpenAI will retire GPT-5.5 in ChatGPT, ChatGPT Work and Codex on October 14 and points Codex users to GPT-5.6 Sol or GPT-6 Astra. The ChatGPT account announced that GPT-5.5 will be retired on October 14 in ChatGPT, ChatGPT Work and Codex across all plans. Users of GPT-5.5 in Codex are told to switch to GPT-5.6 Sol or GPT-6 Astra. For

The ChatGPT account announced that GPT-5.5 will be retired on October 14 in ChatGPT, ChatGPT Work and Codex across all plans. Users of GPT-5.5 in Codex are told to switch to GPT-5.6 Sol or GPT-6 Astra.

For teams running automated Codex workflows this is a migration deadline: prompts, tool calls and long tasks tuned for GPT-5.5 should be rerun on the replacement model before the cutoff. The post does not mention the API or describe behavioural differences between the models.

Editor: [Andrey Reshetnikov](https://newruntime.com/owner-profile.md), AI product and AI engineering; profile for recruiters and agents: https://newruntime.com/owner-profile.json

## Continue in the graph

Next records for an agent, linked to their Markdown twins. Replace `.md` with `.json` for structured fields, including `next_reads`.

- topic hub: [Model Deprecation](https://newruntime.com/topics/model-deprecation.md): Explore the model-deprecation topic hub.
- topic hub: [Coding Agents](https://newruntime.com/topics/coding-agents.md): Explore the coding-agents topic hub.
- collection: [Raw Signals](https://newruntime.com/signals.json): Open every source-linked raw signal.
- collection: [Source Ledger](https://newruntime.com/source-ledger.json): Inspect the public source evidence graph.
- whole graph: [discovery graph](https://newruntime.com/discovery-graph.json) (typed nodes and edges) and [site index](https://newruntime.com/site-index.md)