Simon Willison’s Weblog

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June 2024

June 28, 2024

Serving a billion web requests with boring code (via) Bill Mill provides a deep retrospective from his work helping build a relaunch of the medicare.gov/plan-compare site.

It's a fascinating case study of the choose boring technology mantra put into action. The "boring" choices here were PostgreSQL, Go and React, all three of which are so widely used and understood at this point that you're very unlikely to stumble into surprises with them.

Key goals for the site were accessibility, in terms of users, devices and performance. Despite best efforts:

The result fell prey after a few years to a common failure mode of react apps, and became quite heavy and loaded somewhat slowly.

I've seen this pattern myself many times over, and I'd love to understand why. React itself isn't a particularly large dependency but somehow it always seems to lead to architectural bloat over time. Maybe that's more of an SPA thing than something that's specific to React.

Loads of other interesting details in here. The ETL details - where brand new read-only RDS databases were spun up every morning after a four hour build process - are particularly notable.

# 4:22 pm / react, boring-technology, scaling, postgresql, go, accessibility

Accidental GPT-4o voice preview (via) Reddit user RozziTheCreator was one of a small group who were accidentally granted access to the new multimodal GPT-4o audio voice feature. They captured this video of it telling them a spooky story, complete with thunder sound effects added to the background and in a very realistic voice that clearly wasn't the one from the 4o demo that sounded similar to Scarlet Johansson.

OpenAI provided a comment for this Tom's Guide story confirming the accidental rollout so I don't think this is a faked video.

# 8:53 pm / generative-ai, openai, gpt-4, chatgpt, ai

June 29, 2024

We argued that ChatGPT is not designed to produce true utterances; rather, it is designed to produce text which is indistinguishable from the text produced by humans. It is aimed at being convincing rather than accurate. The basic architecture of these models reveals this: they are designed to come up with a likely continuation of a string of text. It’s reasonable to assume that one way of being a likely continuation of a text is by being true; if humans are roughly more accurate than chance, true sentences will be more likely than false ones. This might make the chatbot more accurate than chance, but it does not give the chatbot any intention to convey truths. This is similar to standard cases of human bullshitters, who don’t care whether their utterances are true; good bullshit often contains some degree of truth, that’s part of what makes it convincing.

ChatGPT is bullshit

# 1:50 pm / ethics, generative-ai, chatgpt, ai, llms

Absolutely any time I try to explore something even slightly against commonly accepted beliefs, LLMs always just rehash the commonly accepted beliefs.

As a researcher, I find this behaviour worse than unhelpful. It gives the mistaken impression that there's nothing to explore.

Jeremy Howard

# 10:52 pm / jeremy-howard, ai, llms

marimo.app. The Marimo reactive notebook (previously) - a Python notebook that's effectively a cross between Jupyter and Observable - now also has a version that runs entirely in your browser using WebAssembly and Pyodide. Here's the documentation.

# 11:07 pm / jupyter, pyodide, webassembly, python, observable, marimo

June 30, 2024

The Super Effectiveness of Pokémon Embeddings Using Only Raw JSON and Images. A deep dive into embeddings from Max Woolf, exploring 1,000 different Pokémon (loaded from PokéAPI using this epic GraphQL query) and then embedding the cleaned up JSON data using nomic-embed-text-v1.5 and the official Pokémon image representations using nomic-embed-vision-v1.5.

I hadn't seen nomic-embed-vision-v1.5 before: it brings multimodality to Nomic embeddings and operates in the same embedding space as nomic-embed-text-v1.5 which means you can use it to perform CLIP-style tricks comparing text and images. Here's their announcement from June 5th:

Together, Nomic Embed is the only unified embedding space that outperforms OpenAI CLIP and OpenAI Text Embedding 3 Small on multimodal and text tasks respectively.

Sadly the new vision weights are available under a non-commercial Creative Commons license (unlike the text weights which are Apache 2), so if you want to use the vision weights commercially you'll need to access them via Nomic's paid API.

# 9:22 pm / ai, embeddings, max-woolf, clip