Show HN: I built a day-by-day timeline of the AI boom (2017–2026, 437 events)
On September 12, 2026, Sam Altman and Elon Musk publicly endorsed Dario Amodei's call to slow down AI development, marking the first time rival CEOs aligned on this issue. Altman indicated that OpenAI is open to coordinating a pause with other labs and hinted at a potential joint slowdown pact, though no signed agreement exists. Additionally, Altman ruled out a 2026 IPO for OpenAI, citing safety concerns as the primary reason for the delay.
- ▪Sam Altman and Elon Musk publicly supported Dario Amodei's essay advocating for pacing the AI frontier on September 12, 2026.
- ▪Altman stated in a Fortune interview that OpenAI is willing to coordinate a pause with rival labs and hinted at a future joint slowdown plan.
- ▪No formal signed agreement between the AI labs has been reached despite the public endorsements and hints of coordination.
- ▪Sam Altman ruled out an initial public offering for OpenAI in 2026, attributing the decision to safety grounds.
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Story provenance
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Record
| Original publisher | Aihistory |
| Canonical URL | https://www.aihistory.live/ |
| Publication time | Sun, 13 Sep 2026 13:31:04 +0000 |
| Retrieval time | 2026-09-13T13:46:50.066Z |
| Last seen | 2026-09-13T13:46:50.066Z |
| 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 | 3F0UrsilELQk · 1 stories |
| 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
Sep 12, 2026Policy VerifiedAltman and Musk endorse Amodei slowdown call; Altman hints at lab pact (no signed agreement)Hours after Amodei's We Must Pace the Frontier essay and its X announcement, Elon Musk reshared it writing Dario is right, and Sam Altman posted I agree with Dario that we need to pace the frontier, committing OpenAI to matching Anthropic's embedded-evaluator access. Same day Altman told Fortune a joint slowdown plan with Amodei, Musk and Hassabis will happen (won't pre-announce private discussions), a day after Reuters reported he told employees OpenAI is open to coordinating a pause with rival labs; he also ruled out a 2026 IPO on safety grounds.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Aihistory.
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