# Claude Opus 5.5 Now Available in Viktor

By Steven Van · 2026-09-22

Viktor adds Claude Opus 5.5, reporting higher usefulness and lower per-task cost than Opus 5 on its ViktorBench evaluation.

**Viktor** now runs on Claude Opus 5.5. On ViktorBench, the company's benchmark built from real tasks submitted through Slack and Teams, Viktor reports the new model scores higher on usefulness than Opus 5 while costing less per task.

![Viktor](<https://www.google.com/s2/favicons?domain=viktor.com&sz=128>)

Viktor

The AI employee that lives in Slack — connects to 3,200+ tools and does the work: reports, dashboards, code, campaigns, and more.

[View Viktor →](<https://creatorstoolbox.com/tools/viktor>)

[Original source](<https://x.com/i/status/2102442451185045515>)

[Read Claude Opus 5.5 Now Available in Viktor on Creators Toolbox](<https://creatorstoolbox.com/blog/viktor-claude-opus-5-5-now-available-in-viktor>)

---
Canonical source: https://creatorstoolbox.com/blog/viktor-claude-opus-5-5-now-available-in-viktor