Flint vs Claude Opus 5.5
Flint took 10 min 5 s and was free at list price, Claude Opus 5.5 took 11 min 46 s and $1.57 at list price. Claude Opus 5.5 took 1.2× as long.
Flint
Recursive · free route · 36 HN pts
Claude Opus 5.5
Anthropic · $20.00/M out · 2,737 HN pts
Only Claude Opus 5.5 has CLI runs here (Claude Code).
Pelican
Generate an SVG of a pelican riding a bicycle
Watch
Draw a mechanical wristwatch that shows the current local time, with a sweeping seconds hand and a date window. Make it look expensive.
Landing
Build the landing page for Lumen Cycles, a Copenhagen workshop that builds custom cargo bikes to order. Make it look like a real brand you would trust with 4,000 euros.
Breakout
Make a Breakout game I can play right now with the keyboard or the mouse. Give it several levels, a score and some juice.
Logo
Design a logo for Night Heron, an independent bookshop that only opens after dark.
About
Write the opening of the About us page for Patchbay, a three-person studio in Rotterdam that repairs vintage synthesizers. About 150 words.
Patchbay began in a small, cluttered workshop in Rotterdam, where solder smoke and old capacitors seem to belong together. We are a three-person studio, which means every synthesizer that comes through our door is handled by one of the same people who started the project. No call center, no hand-off to strangers. We repair vintage synthesizers: the dusty analog beasts, the rare oddities, the ones with missing knobs and mysterious tuning drift. Our work is part electronics, part archaeology, part stubborn love. We listen to the hum before we open the case, and we believe most vintage synths are not dead, just waiting for someone to pay attention. In a city known for moving quickly, we prefer taking our time. Patchbay exists to keep old voices alive, one oscillator, filter, and power supply at a time. If you have a synth that sings, whispers, or hums through the decades, we would be glad to meet it.
Patchbay is three people in a narrow workshop near the Maas in Rotterdam. Every day we open up instruments that were built before most of their current owners were born. Some arrive in flight cases and some come wrapped in old bath towels. Most have a story: a Juno that went quiet halfway through a gig, a Minimoog left in someone's attic for thirty years, or a modular system that a previous technician gave up on.
We started Patchbay because we kept seeing good synthesizers sent off as "unrepairable" when all they needed was patience, a schematic and a steady hand. We swap out dried capacitors, hunt for intermittent faults, recalibrate oscillators until they track properly again, and source or rebuild parts that stopped being made decades ago.
We don't try to make old machines sound new. Our job is to make them sound like themselves again, and to make sure they keep working for the next person who plays them.
Specs and numbers
| Flint | Claude Opus 5.5 | |
|---|---|---|
| Maker | Recursive | Anthropic |
| Made in | US | US |
| Released | 21 Oct 2026 | 22 Sep 2026 |
| Price in, per M tokens | free route (list $0/M) | $4.00 |
| Price out, per M tokens | free route (list $0/M) | $20.00 |
| Context | 262,144 tokens | 1,000,000 tokens |
| Weights | open | closed |
| Hacker News points | 36 | 2,737 |
| Time for the six prompts | 10 min 5 s | 11 min 46 s |
| List price of the six prompts | free | $1.57 |
Flint was free at list price; Claude Opus 5.5 cost $1.57. Flint was faster: 1 min 41 s less in total, and faster on 2 of the 6 prompts.
In the recording, Flint's Breakout game loads but doesn't start; Claude Opus 5.5's plays.
Rebuild this screen experiment: Claude Opus 5.5's rebuild matched the screenshot at 89%; Flint was not in it. Tea Garden experiment: Flint's game passed 5 of 5 checks, Claude Opus 5.5's 5 of 5.





