GPT-5.5 Instant Update; ChatGPT Canvas Discontinued; o3 and GPT 4.5 Retiring
OpenAI has announced updates to its GPT-5.5 Instant model, enhancing response quality and readability. The canvas feature will be discontinued, with writing and coding functionalities integrated into chat responses. Additionally, older models like OpenAI o3 and GPT-4.5 will be retired to focus on newer models.
- ▪The GPT-5.5 Instant update improves response style and quality for better conversational flow.
- ▪Canvas will no longer be available, with writing and coding now supported directly in chat responses.
- ▪OpenAI o3 will be retired on August 26, 2026, and GPT-4.5 on June 27, 2026.
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| Original publisher | OpenAI Help Center |
| Canonical URL | https://help.openai.com/en/articles/9624314-model-release-notes?hn_dupe_filter |
| Publication time | Fri, 29 May 2026 01:43:45 +0000 |
| Retrieval time | 2026-05-29T01:59:40.741Z |
| Last seen | 2026-05-29T01:59:40.741Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | To5rseg_ng4R |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
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| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
Model Release NotesUpdated: 4 hours agoGPT-5.5 Instant Update (May 28, 2026)We’re updating GPT-5.5 Instant in ChatGPT and the API to improve response style and quality. It’s now easier to read, more natural in everyday conversations, and better paced in practical help tasks, with fewer overly long or bullet-heavy responses.With this update, canvas will no longer be available in GPT-5.5 Instant or GPT-5.5 Thinking. Writing and coding functionality is now supported directly in chat responses through writing blocks and code blocks.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at OpenAI Help Center.
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