• Updated 2 Nov, 13:50 UTC
  • Next run 3 Nov, 05:17 UTCNext 3 Nov 05:17
  • Last 7 days: 3 new models · 113 runs7 d: 3 models · 113 runs
Compare

GLM 5.3 FlashX Legal vs Claude Opus 5.5

6 prompts both ran·Specs and numbers·Change models

GLM 5.3 FlashX Legal took 45 min 14 s and $0.42 at list price, Claude Opus 5.5 took 11 min 46 s and $1.57 at list price. GLM 5.3 FlashX Legal took 3.8× as long, and Claude Opus 5.5 cost 3.8× as much.

GLM 5.3 FlashX Legal

Z.ai · $1.25/M out

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

GLM 5.3 FlashX Legal's SVG for the "Pelican riding a bicycle" prompt

GLM 5.3 FlashX Legal

6 min 19 s$0.05947k tokensAPI
Claude Opus 5.5's SVG for the "Pelican riding a bicycle" prompt

Claude Opus 5.5

25 s$0.0462.3k tokensCLI

Watch

Draw a mechanical wristwatch that shows the current local time, with a sweeping seconds hand and a date window. Make it look expensive.

Still of GLM 5.3 FlashX Legal's page for the "Wristwatch that shows the current time" prompt

GLM 5.3 FlashX Legal

9 min 36 s$0.08467k tokensAPI
Still of Claude Opus 5.5's page for the "Wristwatch that shows the current time" prompt

Claude Opus 5.5

1 min 42 s$0.2211k tokensCLI

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.

Still of GLM 5.3 FlashX Legal's page for the "Landing page for a cargo bike workshop" prompt

GLM 5.3 FlashX Legal

12 min 13 s$0.1292k tokensAPI
Still of Claude Opus 5.5's page for the "Landing page for a cargo bike workshop" prompt

Claude Opus 5.5

4 min 8 s$0.5930k tokensCLI

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.

Still of GLM 5.3 FlashX Legal's page for the "Playable Breakout" prompt

GLM 5.3 FlashX Legal

11 min 20 s$0.1184k tokensAPI
Still of Claude Opus 5.5's page for the "Playable Breakout" prompt

Claude Opus 5.5

4 min 39 s$0.6331k tokensCLI

Design a logo for Night Heron, an independent bookshop that only opens after dark.

GLM 5.3 FlashX Legal's SVG for the "Bookshop logo" prompt

GLM 5.3 FlashX Legal

5 min 42 s$0.05141k tokensAPI
Claude Opus 5.5's SVG for the "Bookshop logo" prompt

Claude Opus 5.5

43 s$0.0783.9k tokensCLI

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 devoted to the repair and restoration of vintage synthesizers. We work on the machines that shaped the sound of the last fifty years — Roland, Moog, Yamaha, Korg, EMS, and the rest — from the rare and legendary to the well-loved and well-worn.

We started the studio because these instruments matter. They were built to be repaired, with discrete components, schematics, and construction that reward patience and care. Somewhere along the way, that way of making things fell out of fashion. We think it's worth keeping alive.

Every synthesizer that comes through our door is treated the same way: carefully diagnosed, honestly assessed, and repaired with respect for its original character. No unnecessary modifications, no shortcuts that compromise the instrument. Whether it's a failed voice chip, a dead key, or years of dust and neglect, our job is to put the machine back in the hands of the people who play it.

GLM 5.3 FlashX Legal

3 s<$0.001238 tokensAPI

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.

Claude Opus 5.5

9 s$0.009458 tokensCLI

Specs and numbers

GLM 5.3 FlashX LegalClaude Opus 5.5
MakerZ.aiAnthropic
Made inChinaUS
Released2 Nov 202622 Sep 2026
Price in, per M tokens$0.37$4.00
Price out, per M tokens$1.25$20.00
Context1,048,576 tokens1,000,000 tokens
Weightsclosedclosed
Hacker News points—2,737
Time for the six prompts45 min 14 s11 min 46 s
List price of the six prompts$0.42$1.57

GLM 5.3 FlashX Legal was cheaper: $1.15 less at list price, and less on 5 of the 6 prompts. Claude Opus 5.5 was faster: 33 min 27 s less in total, and faster on 5 of the 6 prompts.

In the recording, both Breakout games play.

Rebuild this screen experiment: Claude Opus 5.5's rebuild matched the screenshot at 89%; GLM 5.3 FlashX Legal was not in it. Tea Garden experiment: Claude Opus 5.5's game passed 5 of 5 checks; GLM 5.3 FlashX Legal was not in it.

Also compared