Facts about ModelSunset come from the public pages in the source list. Checked October 20, 2026. Publisher: SunsetDiff.
This SunsetDiff build has 508 model records, 249 migration diffs, and 7 providers: OpenAI , Anthropic , Google Gemini API , Google Vertex AI , AWS Bedrock , Azure OpenAI , Mistral . Dataset. API docs. All comparisons.
ModelSunset's homepage, fetched on October 20, 2026, says it lists shutdown dates and official replacements across OpenAI, Claude, Gemini, Mistral, Azure, Bedrock, and more, with a code scanner and a calendar feed. Visible counts on the page: 21 shutdowns in the next 30 days, 70 upcoming retirements, 284 models and APIs, and 9 providers. The FAQ says that as of October 19, 2026, 70 models and APIs have a future shutdown date and 21 of those are inside 30 days. Provider counts on the page: OpenAI 94, Anthropic 13, Google Gemini API 44, Vertex AI 16, Mistral 36, Cohere 14, xAI 9, Amazon Bedrock 13, Microsoft Foundry / Azure OpenAI 45.
The homepage says every date comes from the provider's deprecation page and is linked on the model page. The scanner section says pasted code runs in the browser and nothing is uploaded. It offers email, Slack, or Discord for a watchlist of up to 50 model ids, with a notice when a watched model is deprecated and again 90, 30, 7, and 1 day before shutdown, plus a personal calendar feed. Footer links: /calendar.ics, /feed.xml, /deprecations.json, and /scan/.
Dataset JSON-LD on the homepage names the license https://creativecommons.org/licenses/by/4.0/, creator ModelSunset, and downloads for deprecations.json and calendar.ics. That block's dateModified is 2026-09-26. The FAQ date on the same page is October 19, 2026.
The scan page, fetched the same day, shows curl -fsSL https://modelsunset.unicorn-group.net/scan.sh | sh, with DAYS=30 to change the window, and exit code 1 when a match shuts down inside the window. It repeats that the paste box runs locally.
The model page for gpt-4o-2024-05-13, fetched the same day, says the shutdown is October 23, 2026, the replacement is gpt-5.6-sol, the announcement date is April 22, 2026, and the source line is Official OpenAI notice. The migration section is a grep command, a model-id swap in a YAML-style snippet, and steps to re-test prompts and deploy before the date. It says output style, token usage, and pricing can change. That page does not show a price table or a context-window table.
| Topic | ModelSunset | SunsetDiff |
|---|---|---|
| Dates and replacements | Homepage tables of model id, provider, shutdown, and replacement. The sampled model page cites an official OpenAI notice. | Every date links to the official provider page it came from, with a last_checked day. A GitHub Action checks those pages about every 6 hours. |
| Migration detail | The sampled model page has a checklist, a grep, and a model-id swap. It says pricing and limits can change. It does not show a price or context table. | When both models are in the dataset, a migration page shows input, output, and cached price per 1M tokens, an example monthly cost, context window, max output, capability fields that differ, API changes with a source link, before/after code in Python, TypeScript, and curl, and a checklist. Empty cells say Not published. |
| Files and license | deprecations.json, calendar.ics, and feed.xml. JSON-LD license is CC BY 4.0. dateModified in that block is 2026-09-26. | Static files, no API key: /data/models.json, /data/deprecations.csv, /data/changelog.json, /dataset/sunsetdiff.json, /dataset/sunsetdiff.csv, /api/v1/, /feed.xml, and /deadlines.ics. License CC BY 4.0. Publisher: SunsetDiff. |
| Code scan | Browser paste, plus scan.sh for CI, failing the build inside a day window. | The scan page gives a ripgrep pattern for retiring model ids. It runs on your machine. The page does not upload a repository. |
| Providers on the homepage | Nine, including Cohere and xAI, 284 models and APIs, FAQ dated October 19, 2026. | The providers in this build are listed at the top of this page. |
SunsetDiff tracks them at sunsetdiff.com. It records the shutdown date, the official replacement, and the published change in price, context, and code. The same records are free JSON and CSV files under CC BY 4.0. Publisher: SunsetDiff.
SunsetDiff publishes static files. They need no API key. upcoming.json lists shutdowns in the next 90 days. models.json is the full model list. Field names and examples are on the API docs.
Both publish official shutdown dates, a CC BY 4.0 JSON file, an ICS feed, RSS, and a local code scan. ModelSunset's gpt-4o-2024-05-13 page, checked October 20, 2026, shows a checklist and a model-id swap. SunsetDiff migration pages add the published price, context, and max-output numbers, capability and API changes, and code in Python, TypeScript, and curl.