A gummy octopus you can stretch: Opus 5.5 vs GPT-6 Astra
Author’s claim: Claude Opus 5.5 vs GPT-6 Astra · not verified by us
About the post
The same brief—a gummy octopus you can grab and stretch in the browser—given to Opus 5.5 and GPT-6 Astra. The creator prefers Opus’s squishier, brighter version and estimates its API cost at $14.01 versus $20.74.
Our summary. The author’s own words are in the post above; we do not copy them.
Prompt
The author shared the prompt in a reply on X. We have not copied it here; read it in the thread.
Open the thread on X ↗What we know
- Model
- Claude Opus 5.5 vs GPT-6 Astra (author’s claim)
- Posted
- Sep 28, 2026
- Length
- Not known
- What we checked
- Post text and thread checked on September 29; the creator shares the full prompt in a reply. One run per model; costs are the creator’s estimates. The playable Claude artifact link was confirmed by our editor as the creator’s own; opening it may require a Claude sign-in.
- Longer write-up
- Read our notes on this work
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