Anthropic IPO marketing may begin - reported, not confirmed
November 2026, every dated item
| Date | Who | What happens | Status |
|---|
| Week of 9 Nov | Anthropic | Possible start of formal IPO marketing; trading reportedly targeted before Thanksgiving (26 Nov) | Reported |
| 12 Nov | Anthropic | 2026 Usage Policy takes effect | Confirmed |
| 12 Nov | PostgreSQL | PostgreSQL 19 RC2 and scheduled minor releases | Confirmed |
| 13 Nov | Apple | HomeView ($299) available, outside the EU | Confirmed |
| 17-20 Nov | Microsoft | Microsoft Ignite 2026, San Francisco and online; keynote 17 Nov | Confirmed |
| 19 Nov | PostgreSQL | PostgreSQL 19 general availability | Confirmed |
| ~20 or 30 Nov | San Francisco | Data centre moratorium 45-day period ends unless extended; sources differ on the start date | Calculated |
| Not before 24 Nov | Anthropic | Claude Opus 4.5 retirement; no exact day given | No date |
| 30 Nov | Anthropic | Claude Sonnet 4.5 retires from the Claude API | Confirmed |
| 30 Nov | OpenAI | Agent Builder, the Evals dashboard and API, and the v1/prompts API shut down | Confirmed |
| 30 Nov - 4 Dec | AWS | AWS re:Invent 2026, Las Vegas | Confirmed |
| End Nov / early Dec | Character.AI | Court-supervised asset sale expected to finish | Company expectation |
Status column is carried from the compilation this calendar is built on rather than asserted by us.
Confirmed means the vendor has published the date. Reported means a news outlet has it and the company has not
confirmed. Calculated means the date is inferred from a stated period rather than published.
The 30 November cliff
Claude Sonnet 4.5 leaving the Anthropic API is the one with the widest blast radius, because
Sonnet has been the default workhorse tier for most production integrations. Anything pinned to that model string
needs repointing before the end of the month, and a pinned model string is exactly the sort of thing that sits in
a config file nobody has opened since it was written.
OpenAI's shutdowns land the same day and hit tooling rather than models. Agent Builder goes, the
Evals dashboard and its API go, and the v1/prompts API goes. The Evals API is the quiet one - evaluation suites
tend to run in CI, so the failure shows up as a broken pipeline rather than a broken product, often after the
person who wrote it has moved on.
Separately, Anthropic has said Claude Opus 4.5 will not retire before 24 November but has not given an exact day.
Treat that as a date still to land rather than a date you can plan against.
What is actually new in November
Very little, which is itself the story. Apple's HomeView reaches availability on 13 November at $299, outside the
EU. PostgreSQL 19 hits general availability on the 19th. Microsoft Ignite runs 17 to 20 November in San Francisco
and online, with the keynote on the 17th, and AWS re:Invent opens on the 30th and runs into December - both are
the kind of event where launches get announced rather than scheduled in advance.
The two names everyone asks about, GPT-7 and Claude 6, have no announced date. Anyone giving you one is guessing.
December, so you can plan past the month
| Date | Who | What happens | Status |
|---|
| 1 Dec | Google | Gemini 4 Argon API rises from $2/$10 to $4/$20 per million tokens; Batch, Flex and Priority tiers also double | Confirmed |
| 1 Dec | OpenAI | gpt-image-1-mini, gpt-image-1.5 and chatgpt-image-latest shut down | Confirmed |
| 2 Dec | European Commission | EU AI Act bans on non-consensual intimate imagery and CSAM generation; machine-readable marking rule applies to pre-August 2026 systems | Confirmed |
| 8-13 Dec | NeurIPS | NeurIPS 2026; main conference 8-10 Dec Sydney, 9-11 Dec Paris and Atlanta | Confirmed |
| 11 Dec | OpenAI | GPT-5 snapshots (gpt-5-2025-08-07, gpt-5-mini, gpt-5-nano, gpt-5-pro) plus o3 and o3-pro shut down | Confirmed |
| 31 Dec | Google | Gemini 3.8 Flash promotional price ends; rises to $1.50/$7.50 on 1 January 2027 | Confirmed |
The one to budget for is 1 December: Gemini 4 Argon's API price doubles from $2/$10 to $4/$20 per
million tokens, and the Batch, Flex and Priority tiers double with it. If Argon is in your stack, your December
invoice is twice your November one unless you move. Gemini 3.8 Flash's promotional rate also ends on 31 December,
rising to $1.50/$7.50 on 1 January 2027.
Frequently asked questions
What AI models are being retired in November 2026?
Claude Sonnet 4.5 retires from the Anthropic API on 30 November. Claude Opus 4.5 will not retire before 24 November but has no published date yet.
What is OpenAI shutting down on 30 November 2026?
Agent Builder, the Evals dashboard and the Evals API, and the v1/prompts API. On 1 December it also shuts down gpt-image-1-mini, gpt-image-1.5 and chatgpt-image-latest.
Is the Anthropic IPO happening in November?
It is reported, not confirmed. Formal IPO marketing may begin the week of 9 November, with trading reportedly targeted before Thanksgiving on 26 November. Anthropic has not confirmed either.
Is GPT-7 launching in November 2026?
No date has been announced for GPT-7, or for Claude 6. Neither appears on any confirmed schedule.
When does Gemini 4 Argon get more expensive?
1 December 2026. The API price rises from $2 per million input and $10 per million output to $4 and $20, and the Batch, Flex and Priority tiers double as well.
What conferences are on in November 2026?
Microsoft Ignite 2026 runs 17 to 20 November in San Francisco and online, keynote on the 17th. AWS re:Invent 2026 opens 30 November in Las Vegas and runs to 4 December.
Sources
Calendar dates and confirmation status compiled from
9to5AI's November and December 2026 schedule,
which carries the status labels reproduced here. Anthropic IPO timing as reported by Bloomberg via the same
compilation. See also our
AI IPO tracker for filing status.
Dates change. Verify against the vendor before acting on
any of them. Last updated 26 October 2026.