Jon Callahan 🌞

Father | Software Engineer | Heliocentrist ☀️✌️

[Jon Callahan 🌞 @joncallahan]

@VicVijayakumar Fuses and magnetrons are easy to swap but I wouldn’t touch the cap

[Jon Callahan 🌞 @joncallahan]

@chrismaconi Saw the same https://t.co/0Xfh9Y6gji

[Jon Callahan 🌞 @joncallahan]

Grok @bot uses a lot of different models under the hood, Opus 5, flash 2.5 (underrated imo) and the sand-* models which was the codename before grok bot branding

[Jon Callahan 🌞 @joncallahan]

@fayazara I love it. Thanks for making it

[Jon Callahan 🌞 @joncallahan]

Grok @bot uses a lot of different models under the hood, Opus 5, flash 2.5 (underrated imo) and the sand-* models which was the codename before grok bot branding

[Jon Callahan 🌞 @joncallahan]

@kristaletz @bot Sent 🙏

[Jon Callahan 🌞 @joncallahan]

@rauchg Don’t copy that floppy

[Jon Callahan 🌞 @joncallahan]

@p_millerd Change request

[Jon Callahan 🌞 @joncallahan]

I bet they don’t expose the actual images and pipe everything through Visual Intelligence. Helps with privacy concerns (AirPods in locker room case) and seems very Apple-like to just not give you the pictures if they’re going to be poor quality

[Aaron @aaronp613]

Here is your first look at AirPods with Cameras in action using Visual Intelligence.

This video file came from macOS 26.7 RC

[Jon Callahan 🌞 @joncallahan]

@aaronp613 I bet they don’t expose the actual images and pipe everything through Visual Intelligence. Helps with privacy concerns (AirPods in locker room case) and seems very Apple-like to just not give you the pictures if they’re going to be poor quality

[Jon Callahan 🌞 @joncallahan]

Stripe will turn this into the San Francisco Token Exchange. Match bid and ask for token inference and take a cut.

[Polymarket @Polymarket]

JUST IN: Stripe is reportedly nearing a deal to acquire AI platform OpenRouter for more than $7,000,000,000.00.

[Jon Callahan 🌞 @joncallahan]

@_sunnysahota @maticrobots It was such a surprising delightful moment

[Jon Callahan 🌞 @joncallahan]

@Shpigford Of course

[Jon Callahan 🌞 @joncallahan]

@chaotictransfem I like @git_fork

[Jon Callahan 🌞 @joncallahan]

@matsonj These charts started popping in my feed last week. Good stuff. Keep em honest

[Jon Callahan 🌞 @joncallahan]

@weswinder Woah I thought this was someone’s dribbble account

[Jon Callahan 🌞 @joncallahan]

@gyc @ChrisJBakke Saw this on Jay Leno in the first dotcom bubble

[Jon Callahan 🌞 @joncallahan]

It’s been downhill since opus 4.5

[Arena.ai @arena]

We analyzed tens of thousands of real-world, high-reasoning Claude Opus and Fable outputs from versions 4.5 to 5 in the Text Arena and found that @claudeai's writing has changed in more ways than one:

Across language complexity, patterns and markers, we now see:

Claude’s answers have become much longer:
- Opus 5 averages 510 words per response
- This makes Opus 5 responses 3x longer than Opus 4.5’s average of 158

Responses have also become more structurally elaborate from Opus 4.5 to Opus 5:
- 58% rise in average sentence length
- 46% rise in clause frequency rises

However, the vocabulary itself is not becoming more difficult, making Opus 5 longer and more structurally complex, but lexically simpler between 4.5 and 5:
- 6.8% pt drop in long content words (46.9% to 40.1%)
- 53% drop in abstract nouns (6.02 → 3.79 per 1k words)

Writing habits people notice are much more common in Opus 5:
- 2.3x as many em dashes
- ~2x as many phrases like “load-bearing”
- 50% more honesty wording like “honestly” and “frankly”

Fable 5 is 38% more concise than Opus 5, averaging 316 words vs. 510. At the same time, it is nearly 2x as likely to include praise/validation or open with phrases like “yes, exactly”

[Jon Callahan 🌞 @joncallahan]

@VicVijayakumar What inflation

[Jon Callahan 🌞 @joncallahan]

Not to be dramatic but.. This is the most consequential talk I’ve seen in years. We are in uncharted territory with, even todays, true frontier of models. Things are gonna get weird

https://t.co/W8G01YEPEs

[Jon Callahan 🌞 @joncallahan]

@EliasofIX @liquidai Chichillin’