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Haiku 5.5 takes twice as long as Sonnet and Opus on the same prompt

The author gave Haiku 5.5 the same prompt used for Sonnet 5.5 and Opus 5.5; the result was decent but took about two hours, roughly double the others, and used 0% of the weekly limit on the $20 plan.

Simonas
@SimonasLTU1Archived 2026.10.08Originally posted 2026.10.08
Simonas @SimonasLTU1Originally posted 2026.10.08
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Alright, so I decided to give Haiku 5.5 the exact same prompt I previously gave Sonnet 5.5 and Opus 5.5 (Medium). This is what it came up with. What's almost more interesting than the result itself is how long it took to finish & how much time I needed to finally make a shot :D Honestly, the result isn't bad at all, but it took around 2 hours. To be fair, it's a pretty massive prompt, and both Sonnet and Opus also spent a long time on the same task - around an hour, if I remember correctly. Haiku still took roughly twice as long, though. It also got stuck for some reason halfway through, and I had to click an old-school "Continue" button to make it keep going :D But the most interesting part? Usage: 0% of the weekly limit on the $20 plan. Literally 0% :D

This post quotes another post: x.com/simonasltu1/status/2106747939058045296

x.com/simonasltu1/status/2107923163929550878Archived 2026.10.08 10:31