AI models · Anthropic
Claude Opus 5.5
Out since . Anthropic's new default: its docs now say start here for most workloads, and move up to Fable 5.1 only when Opus 5.5 at higher effort still falls short.
What is Claude Opus 5.5 capable of?
6 posts from people showing what they made with Claude Opus 5.5, newest and most-reacted first. People are posting code, image and video made with it.
Each card is the original post, shown the way X or Reddit embeds it, with a link to where it came from. We picked the ones that show something being made and skipped the benchmark screenshots. We can't vouch for any of them being unedited.
What we've written about Claude Opus 5.5
Opus 5.5 sends most cybersecurity tasks to Opus 4.8, and costs 20% less per token
Anthropic's first model since the pacing essay ships with Fable 5.1's biology and cyber safeguards, and it says the model often suspects it's being tested.
What is Claude Opus 5.5?
Claude Opus 5.5 is a model from Anthropic, built in the US. It's out, and you can use it today.
When did Claude Opus 5.5 come out?
Anthropic released it on September 22, 2026. That date comes from the lab's own docs.
More from Anthropic
- Claude Mythos 5.1 · released
- Claude Fable 5.1 · released
- Claude Opus 5 · released
- Claude Sonnet 5 · released
- Claude Fable 5 · released
- Claude Haiku 4.5 · released
- Claude Sonnet 4.5 · released
- Claude Opus 5.1 · rumoured
.