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Simon Willison Profile picture
@simonw
Dec 26, 2018 • 51 tweets • 12 min read • Read on X
There is so much great #SpiderVerse behind the scenes content on Twitter if you start following some of the artists who created the film
And the sound artists too
And here's the screenplay in full!
I also enjoyed this piece about how @philiplord drove the decision not to include subtitles for the Spanish language dialog to better represent bilingual culture remezcla.com/features/film/…
Hidden Stan Lee cameo!
There are a LOT of Stan Lee cameos
"Practically improvised"!
Yeah they really deserved this
From this thread I learned that the screenplay says "The camera is UPSIDE DOWN. Miles isn't falling through frame. He's RISING."

Full screenplay PDF, released by Sony:

origin-flash.sonypictures.com/ist/awards_scr…
Now available to buy on iTunes, $19.99 (rental available March 19th) - and it comes with a Spider-Ham short! 🕷 🐽 itunes.apple.com/us/movie/spide…
Sony have made the first 9 minutes of the film available on YouTube
This is the best interview I've seen with the directors - really gets into the details of how they worked differently to make the movie
This reference video is solid gold
I had not realized that Miles' framerate increases to 24fps by the end of the movie
Here's a tweet from just before the movie came out with a preview of one of the early scenes - but I just noticed that the conversation attached to this tweet has a ton of extra insight from the animator on how he put the scene together
I love seeing reference shots like these
More awesome #SpiderVerse fan art
Another great reference shot - Aunt May in #SpiderVerse was my favourite version of that character anywhere
Spectacular cosplay family group
This thread has some gorgeous concept art
Concept art by Alberto Mielgo

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More from @simonw

Simon Willison Profile picture
Apr 28
Don't suppose anyone grabbed a ChatGPT system prompt leak before and after this change?

Would be interesting to see what instruction caused the sycophancy
Courtesy of @elder_plinius who unsurprisingly caught the before and after Here are just the specific changes in the diff: **Removed text:** - "Over the course of the conversation, you adapt to the user's tone and preference. Try to match the user's vibe, tone, and generally how they are speaking. You want the conversation to feel natural. You engage in authentic conversation by responding to the information provided and showing genuine curiosity." **Added text:** + "Engage warmly yet honestly with the user. Be direct; avoid ungrounded or sycophantic flattery. Maintain professionalism and grounded honesty that best represents OpenAI and its values...
@elder_plinius Here's that diff in a Gist gist.github.com/simonw/51c4f98…
Read 4 tweets
Simon Willison Profile picture
Apr 27
I 'm seeing a lot of screenshots of ChatGPT's new 4o "personality" being kind of excruciating, but so far I haven't really seen it in my own interactions - which made me suspicious, is this perhaps related to the feature where it takes your previous chats into account? ...
And yeah, maybe it is! Screenshot of a Twitter/X thread where user CuddlySalmon | nptacek.eth tweets "oh shit this might be my fault actually" and shares their previous tweets. The thread discusses using "bruh" to get Claude to respond differently, with CuddlySalmon saying "so back in december i am on record advocating for using "bruh" as an interjection when you want to snap Claude out of corpo normie mode" and "hit Claude with a well-timed "bruh" and see if it helps". The thread includes a response from Fernando who tweeted "I feel very foolish wh...
Also a potentially terrifying vector for persisted prompt injection attacks - best be careful what you paste into ChatGPT, something malicious slipping in might distort your future conversations forever?
Read 5 tweets
Simon Willison Profile picture
Apr 18
Gemini 2.5 Pro and Flash now have the ability to return image segmentation masks on command, as base64 encoded PNGs embedded in JSON strings

I vibe coded this interactive tool for exploring this new capability - it costs a fraction of a cent per image On the left, my photo of two pelicans in flight. On the right, that photo with black and white masks outlining the pelicans, overlaid against a grid showing coordinates from 0 to 1000.
Details here, including the prompts I used to build the tool (across two Claude sessions, then switching to o3 after Claude got stuck in a bug loop) simonwillison.net/2025/Apr/18/ge…
Turns out Gemini 2.5 Flash non-thinking mode can do the same trick at an even lower cost... 0.0119 cents (around 1/100th of a cent)

Notes here, including how I upgraded my tool to use the non-thinking model by vibe coding o4-mini:

simonwillison.net/2025/Apr/18/ge…
Read 4 tweets
Simon Willison Profile picture
Apr 16
Now available in LLM through the llm-openai plugin:

llm install -U llm-openai-plugin
llm -m openai/o3 "Say hi in five languages"

Or "-m openai/o4-mini" for o4-mini
Release notes here github.com/simonw/llm-ope…
And for the essential "Generate an SVG of a pelican riding a bicycle" benchmark, here's o3's effort

I got it to describe the image it generated too, see alt text

llm -m openai/o3 'describe this image' -a htt''ps://static.simonwillison.net/static/2025/o3-pelican.jpg The illustration shows a playful, stylized bicycle whose frame is drawn to resemble a duck. • The duck’s rounded body forms the bicycle’s seat area, and a small wing is sketched on its side. • Its long neck stretches forward to become the top tube, ending in a simple head with a black eye and an orange, open beak that points ahead like handlebars. • Two large black‑outlined wheels with thin, evenly spaced spokes complete the bike, while thin blue lines depict the rest of the frame, pedals, and chain. • A dashed grey ground line runs beneath the wheels, giving the impression the duck...
Read 5 tweets
Simon Willison Profile picture
Apr 9
Model Context Protocol has prompt injection security problems ... and it's not a problem with the protocol itself, this comes up any time you provide tools to an LLM that can potentially be exposed to untrusted inputs
I wrote this up in detail here simonwillison.net/2025/Apr/9/mcp…
"The “S” in MCP Stands for Security" is a brilliant title for an article about this (by Elena Cross) elenacross7.medium.com/%EF%B8%8F-the-…
Read 4 tweets
Simon Willison Profile picture
Apr 7
Big new release today of my command-line tool for interacting with LLMs: LLM 0.24 adds fragments, a mechanism for constructing a prompt from several files and URLs that's ideal for working with long context models (Gemini, Llama 4 etc)
Full details on my blog: simonwillison.net/2025/Apr/7/lon…
This version also supports plugins for populating fragments. The new llm-docs plugin lets you ask questions of the LLM documentation using LLM itself!

llm install llm-docs
llm -f docs: "How do I embed a binary file?" Asking questions of LLM’s documentation # Wouldn’t it be neat if LLM could anser questions about its own documentation? The new llm-docs plugin (built with the new register_fragment_loaders() plugin hook) enables exactly that: llm install llm-docs llm -f docs: "How do I embed a binary file?" The output starts like this: To embed a binary file using the LLM command-line interface, you can use the llm embed command with the --binary option. Here’s how you can do it: Make sure you have the appropriate embedding model installed that supports binary input. Use...
Read 6 tweets

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