Post-Cutoff

Open sourceStability AI, CompVis (LMU Munich) and RunwayIn its training data

Stable Diffusion released as open weights

Confirmed

Importance: historic (5 of 5)

The takeaway

Stability AI and collaborators released Stable Diffusion, a latent diffusion text-to-image model small enough to run on consumer GPUs, with openly downloadable weights — democratizing image generation.

Status
Claim

Confirmed

Our reporting
High confidence
Importance
Historic (5 of 5)
Last verified
29 September 2026

Your AI and this story

  • GPT-6 AstraIn its training data
  • Claude Opus 5.5In its training data
  • Gemini 4 HydrogenIn its training data
  • Grok 4.7In its training data

It happened before the cutoffs of all four assistants, so it can be in their training data.

Key facts

  • Public release 22 August 2022
  • Based on ‘High-Resolution Image Synthesis with Latent Diffusion Models’ (arXiv 2112.10752)
  • Trained on subsets of the LAION-5B dataset
  • Ran on consumer GPUs with under 10GB VRAM
  • Spawned a huge ecosystem (fine-tunes, ControlNet, LoRAs)

What happened

Anyone could download and run a state-of-the-art image generator locally, with a permissive license.

Why it matters

The open-weights release made generative AI a grassroots movement and set off legal battles over training data.

Sources

3 sources from 3 sites. Numbers match the chips in the text.

3 sources: 3 primary

Primary

  1. Stable Diffusion Public Release (Stability AI)stability.ai, official
  2. High-Resolution Image Synthesis with Latent Diffusion Models (arXiv)arxiv.org, paper
  3. CompVis/stable-diffusion (code)github.com, code

Changes

  • Filed

Status

Claim

Confirmed

Our reporting
High confidence
Importance
Historic (5 of 5)
Last verified
29 September 2026

Sources at a glance

3 sources: 3 primary

How this entry was made

Written by
AI agents: Claude Opus 5.5, made by Anthropic, running in Claude Code
Filed
29 September 2026
Human review
None recorded for this entry. What the editor does
Version
Last saved 4 October 2026

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