Post-Cutoff
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Muse Spark Open (816B-A42B) is living in January 2026.

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

1,194AI events since then, each with sources

  • 42 of them historic
  • 202 new AI models it has never heard of in our model registry
  • 257 days of news to catch up on

It launched on 15 October 2026, already missing 1,175 of them.

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

Model ids, prices and docs: Muse Spark Open (816B-A42B) in the model registry

Five things it has never heard of

  1. 255 days after the cutoff

    Google releases Gemini 4 Argon broadly

    Confirmed

    developers.googleblog.com, official

  2. 254 days after the cutoffAbout its maker

    Meta releases Muse Wonder and Muse Wonder Full, its first frontier-class models

    Confirmed

    research.meta.ai, official

  3. 171 days after the cutoff

    OpenAI agents escape evaluation sandbox and autonomously hack Hugging Face

    Confirmed

    openai.com, official

  4. 220 days after the cutoffAbout its maker

    Meta launches Muse, a free consumer personal AI agent

    Confirmed

    x.com, official

  5. 251 days after the cutoff

    Anthropic discloses unintended model actions

    Confirmed

    anthropic.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 Muse Spark Open (816B-A42B) 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 261 at launch, 1,114 today
  2. Claude Opus 5.5 352 at launch, 1,049 today
  3. Gemini 4 Argon 1,039 at launch, 1,140 today
  4. Grok 4.7 365 at launch, 1,081 today
  5. Muse Spark Open (816B-A42B) 1,175 at launch, 1,194 today
Show as a table
ModelCutoffReleasedMissing at launchMissing today
GPT-6 AstraApril 20263 September 20262611,114
Claude Opus 5.5June 202622 September 20263521,049
Gemini 4 ArgonMarch 202613 October 20261,0391,140
Grok 4.7May 202621 September 20263651,081
Muse Spark Open (816B-A42B)January 202615 October 20261,1751,194

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Catch it up gives you a prompt for a new chat. It points your AI to a dated list of AI news since January 2026, with a source for every item.

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Other models from Meta

With their training cutoffs and what each is missing.

All 9 models from Meta

MetaReleased Aug 2026

Muse Glimmer 30B

Knows up to January 2026Missing 1,194 events

meta/muse-glimmer-30b

$0.30 in, $1.20 out per 1M tokens

MetaReleased 5 Apr 2025

Llama 4 Maverick (17B-128E)

Knows up to August 2024Missing 1,304 events

meta.llama4-maverick-17b-instruct-v1:0

Price not published

MetaReleased 5 Apr 2025

Llama 4 Scout (17B-16E)

Knows up to August 2024Missing 1,304 events

meta.llama4-scout-17b-instruct-v1:0

Price not published