True open-source LLM Apertus 1.5 released
Apertus 1.5 is a continued pretraining of Apertus 1.0: we added 4 trillion tokens of text and multimodal training data to the 8B model and 2 trillion tokens to the 70B model. As with every Apertus release, the models are fully open: open weights, open data, open values, and full training details. The updated 8B and 70B models are released on July 24, 2026.
- ▪Apertus 1.5 is a continued pretraining of Apertus 1.0: we added 4 trillion tokens of text and multimodal training data to the 8B model and 2 trillion tokens to the 70B model.
- ▪As with every Apertus release, the models are fully open: open weights, open data, open values, and full training details.
- ▪The updated 8B and 70B models are released on July 24, 2026.
Hacker News (AI / LLM) files mainly under ai. We currently carry 3,301 of its stories.
Story provenance
Source · retrieval · rights · ranking — open for full record
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Story provenance
Attribution is not the same as permission. This drawer separates discovery metadata, excerpts, WeSearch-generated summaries, reuse status, and whether the publisher receives the visit. Nothing here claims a legal grant the publisher has not made.
Record
| Original publisher | Apertus-ai |
| Canonical URL | https://www.apertus-ai.org/articles/2026-07-apertus-1-5/ |
| Publication time | Sat, 25 Jul 2026 18:56:17 +0000 |
| Retrieval time | 2026-07-25T19:07:22.626Z |
| Last seen | 2026-07-25T19:07:22.626Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | 4WFPsAQ8PpXS |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
Rights status (four layers)
WeSearch handling by dimension
| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
html { overflow-y: scroll !important; } body { font-size: 1.125rem; min-height: calc(100vh + 1px); } .nav-link { font-size: 1.1rem; font-weight: 500; } p, li { line-height: 1.75; } .row.g-5 { --bs-gutter-x: 5rem; } .nav-link { color: #374151 !important; transition: color 0.2s ease; } .nav-link:hover { color: #49BED8 !important; } .nav-link.active { color: #49BED8 !important; } #main-nav { z-index: 100; transition: background-color 0.3s, box-shadow 0.3s; background-color: transparent; box-shadow: none; } @media (max-width: 991px) { #main-nav { background-color: white; box-shadow: 0px 3px 10px rgba(0, 0, 0, 0.3); } } #main-nav.scrolled { background-color: rgba(255, 255, 255, 0.95); box-shadow: 0 1px 3px rgba(0,0,0,0.1); } #nav-brand { opacity: 0; pointer-events: none; transition: opacity…
Excerpt limited to ~120 words for fair-use compliance. The full article is at Apertus-ai.
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