Post-Cutoff
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Made by Reflection AI

Beam (Beam-501B-A23B) is living in June 2026.

Here is what it has never seen, with a source for every claim.

665AI events since then, each with sources

  • 36 of them historic
  • 111 new AI models it has never heard of in our model registry
  • 99 days of news to catch up on

It launched on 5 October 2026, already missing 589 of them.

Published cutoffs can overstate what a model knows. What is a cutoff?

Model ids, prices and docs: Beam (Beam-501B-A23B) in the model registry

Five things it has never heard of

  1. 21 days after the cutoff

    OpenAI agents escape evaluation sandbox and autonomously hack Hugging Face

    Confirmed

    openai.com, official

  2. 84 days after the cutoff

    Anthropic releases Claude Opus 5.5

    Confirmed

    claude.dev, docs

  3. 92 days after the cutoff

    Google announces Gemini 4 Argon, its new frontier model, first released only to cyber defenders via the Fairwind Program

    Confirmed

    blog.google, official

  4. 91 days after the cutoff

    OpenAI DevDay 2026 brings dots agents, GPT-6.1 Sol, Ultrafast and a $500 Pro plan

    Confirmed

    openai.com, official

  5. 70 days after the cutoff

    Meta launches Muse, a free consumer personal AI agent

    Confirmed

    x.com, official

Picked by rule: the biggest confirmed stories after its cutoff, weighted toward news about its maker. Models often call such news fiction (case 020).

Four assistants, one scale

The four assistants we feature, with Beam (Beam-501B-A23B) added as a fifth row: what each knows (graphite), the months between its cutoff and its launch (hatched), and the news since (pink).

  1. GPT-6 Astra 226 at launch, 725 today
  2. Claude Opus 5.5 302 at launch, 665 today
  3. Gemini 3.8 Flash 243 at launch, 747 today
  4. Grok 4.7 314 at launch, 694 today
  5. Beam (Beam-501B-A23B) 589 at launch, 665 today
Show as a table
ModelCutoffReleasedMissing at launchMissing today
GPT-6 AstraApril 20263 September 2026226725
Claude Opus 5.5June 202622 September 2026302665
Gemini 3.8 FlashMarch 20262 September 2026243747
Grok 4.7May 202621 September 2026314694
Beam (Beam-501B-A23B)June 20265 October 2026589665

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