Claude Opus 5 vs Claude Opus 5.5
aka Opus 5 vs Opus 5.5
- Author picksClaude Opus 5.51–0
- CheaperClaude Opus 5.51/1 postsmedian gap ~4.9×
- FasterClaude Opus 5.51/1 postsmedian gap ~1.9×
As stated in each post, not a controlled benchmark.
Posts
1
Same prompt, separate runs
7Not a controlled comparison: prompts, tools and time differ.
About this matchup
Claude Opus 5 vs Claude Opus 5.5 in real side-by-side tests: 1 post from X where both got the same prompt; 1 post reports cost or time. Judge coding ability from the actual outputs.
Opus 5 vs Opus 5.5: which is better for coding?
Which is better for coding, Opus 5 or Opus 5.5?
Author picks: where the author preferred one of the two, they picked Claude Opus 5.5 once and Claude Opus 5 never. That covers 1 of the 1 post here; each post is a different task, so watch the outputs above for the work you care about.
Which is cheaper, Opus 5 or Opus 5.5?
1 post states a cost for both: Claude Opus 5.5 was cheaper in it (~4.9× cheaper). These are the costs the posts state for each run, not list prices.
Which is faster, Opus 5 or Opus 5.5?
1 post states a time for both: Claude Opus 5.5 was faster in it (~1.9× faster). Times are as stated in each post; tools and settings differ between posts.
Summary
Claude Opus 5 and Claude Opus 5.5 appear together in 1 post on X: interactive 3D rooftop glass pool, two Opus generations (@MrTacticalX). In @MrTacticalX's interactive 3D rooftop glass pool, two Opus generations, Claude Opus 5.5 was cheaper ($14.00 vs $68.00) and faster (1 h 08 min vs 2 h 08 min), as reported in the post.
What each post reports
| Post | Model | Time | Cost | Tokens | Author’s verdict | Post |
|---|---|---|---|---|---|---|
| Interactive 3D rooftop glass pool, two Opus generations@MrTacticalX | Claude Opus 5.5 | 1 h 08 min | $14.00 | — | Author’s pick | X post |
| Interactive 3D rooftop glass pool, two Opus generations@MrTacticalX | Claude Opus 5 | 2 h 08 min | $68.00 | — | Claude Opus 5.5 was twice as fast, five times cheaper and far more detailed, down to the buildings in the background. | X post |
Only numbers stated in each post. “—” means the post doesn’t say.
Quick facts
| Model | Vendor | Released | Input $/1M tokens | Output $/1M tokens | Context (tokens) | Official links |
|---|---|---|---|---|---|---|
| Claude Opus 5 | Anthropic | |||||
| Claude Opus 5.5 | Anthropic | 2026-09-22 | $4 | $20 | 1,000,000 | Model docs |
From the vendors’ official pages, checked 2026-10-19. Standard API list prices; each value links its source and a blank cell could not be verified. The archive’s own numbers above are what each post states.
Who won where
1- Interactive 3D rooftop glass pool, two Opus generationsClaude Opus 5.5 was twice as fast, five times cheaper and far more detailed, down to the buildings in the background.— the author’s view, @MrTacticalX (paraphrased)
Models
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