Made by MBZUAI Institute of Foundation Models (IFM)
K2 Horizon 375B-A23B has no published cutoff.
Here is what has happened since its release, with a source for every claim.
At least1,056AI events since its release on 3 September 2026
- 27 of them historic
- 87 AI models released after it in our model registry
- 52 days of news since its release
MBZUAI Institute of Foundation Models (IFM) doesn’t publish a training cutoff, so we count from its release date. The real gap is larger.
Model ids, prices and docs: K2 Horizon 375B-A23B in the model registry
Five things it has never heard of
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Google releases Gemini 4 Argon broadly
Confirmed
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Meta releases Muse Wonder and Muse Wonder Full, its first frontier-class models
Confirmed
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OpenAI DevDay 2026 brings dots agents, GPT-6.1 Sol, Ultrafast and a $500 Pro plan
Confirmed
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Meta launches Muse, a free consumer personal AI agent
Confirmed
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Anthropic discloses unintended model actions
Confirmed
Picked by rule: the biggest confirmed stories after its release, weighted toward news about its maker. Models often call such news fiction (case 020).
Four assistants, one scale
The four assistants we feature, for comparison. K2 Horizon 375B-A23B has no published cutoff, so it has no row of its own.
- GPT-6 Astra 267 at launch, 1,340 today
- Claude Opus 5.5 365 at launch, 1,274 today
- Gemini 4 Argon 1,065 at launch, 1,366 today
- Grok 4.7 378 at launch, 1,306 today
Show as a table
| Model | Cutoff | Released | Missing at launch | Missing today |
|---|---|---|---|---|
| GPT-6 Astra | April 2026 | 3 September 2026 | 267 | 1,340 |
| Claude Opus 5.5 | June 2026 | 22 September 2026 | 365 | 1,274 |
| Gemini 4 Argon | March 2026 | 13 October 2026 | 1,065 | 1,366 |
| Grok 4.7 | May 2026 | 21 September 2026 | 378 | 1,306 |
Your card
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postcutoff.com/you/k2-horizon-375b-a23b.