GPT-6.1 Terra vs DeepSeek V4.1 Flash
GPT-6.1 Terra took 5 min 29 s and $0.15 at list price, DeepSeek V4.1 Flash took 9 min 16 s and $0.063 at list price. DeepSeek V4.1 Flash took 1.7× as long, and GPT-6.1 Terra cost 2.3× as much.
GPT-6.1 Terra
OpenAI · $5.00/M out · 706 HN pts
DeepSeek V4.1 Flash
DeepSeek · $0.50/M out · 1,482 HN pts
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 is a three-person studio in Rotterdam, dedicated to repairing vintage synthesizers and keeping them in use.
Old instruments have a way of becoming familiar: the feel of a key, the response of a filter, the particular sound a circuit makes when it’s working as it should. When something goes wrong, we take the time to understand both the fault and the instrument around it. We work carefully, preserving original parts wherever practical and making repairs with the long term in mind.
Our studio brings together a shared interest in electronics, sound and the machines that connect them. Whether a synthesizer has a stubborn key, a noisy output or has been silent for years, we’re interested in finding a way forward.
We work with musicians, collectors and anyone who wants to hear an old instrument come to life again. If you have a synth that needs attention, we’d be glad to hear about it.
Patchbay is a three-person studio in Rotterdam dedicated to the care, repair, and resurrection of vintage synthesizers. We started in a small workshop near the Maas, surrounded by oscillators, patch cables, and service manuals, because these instruments deserve more than dusty shelves and hasty fixes. Between us, we have decades of experience in electronics, sound design, and restoration, but we approach every machine with the same curiosity: listen first, trace the signal, understand the history, then bring it back to life. Whether it's a crackly filter, a dead voice card, a drifting oscillator, or a power supply that needs rebuilding, we work carefully, honestly, and with respect for original character. We also advise on maintenance, calibrate tuning and envelopes, and source hard-to-find parts when possible. At Patchbay, repair isn't just about making sound again. It's about keeping these instruments making music for decades to come.
Specs and numbers
| GPT-6.1 Terra | DeepSeek V4.1 Flash | |
|---|---|---|
| Maker | OpenAI | DeepSeek |
| Made in | US | China |
| Released | 26 Oct 2026 | 10 Sep 2026 |
| Price in, per M tokens | $1.00 | $0.045 |
| Price out, per M tokens | $5.00 | $0.50 |
| Context | 1,050,000 tokens | 1,048,576 tokens |
| Weights | closed | open |
| Hacker News points | 706 | 1,482 |
| Time for the six prompts | 5 min 29 s | 9 min 16 s |
| List price of the six prompts | $0.15 | $0.063 |
DeepSeek V4.1 Flash was cheaper: $0.084 less at list price, and less on each of the 6 prompts. GPT-6.1 Terra was faster: 3 min 47 s less in total, and faster on 5 of the 6 prompts.
In the recording, both Breakout games play.
Rebuild this screen experiment: GPT-6.1 Terra's rebuild matched the screenshot at 95%; DeepSeek V4.1 Flash was not in it. Tea Garden experiment: GPT-6.1 Terra's game passed 5 of 5 checks; DeepSeek V4.1 Flash was not in it.