Give it
- Refactors that touch many files and need thinking through first.
- Tough bugs with clues scattered across code, logs, and docs.
- Design work where the requirements are still fuzzy and trade-offs matter.
Model · Anthropic
Claude Opus 5.5Released September 22, 2026 · Available now
Hand the hard problems to Opus 5.5.
Anthropic's model for complex work that takes sustained judgment. In Agent.Space, pick an Agent and it is ready. No separate account needed.
Works with
In your space, pick an Agent, then pick the model.
SpecsOfficial page
- Context
- 1MToken
- Max output
- 128KToken
- Reasoning effort
- 5 levels
- Input
- Text · Image
Is it the one?
When to reach for Claude Opus 5.5
Matching the model to the task beats paying top price for everything.Skip it for
- Small edits: a copy change, a style tweak.
- Bulk changes with clear, repeatable steps.
- Well-scoped daily work, where Sonnet 5.5 costs less.
In Agent.Space
Pick it and go. The rest is handled.
No separate account
No Anthropic account, no API key to set up. What you use goes on your credits or your plan.
Set the reasoning effort
Low, Medium, High, Extra high, and Maximum. The default is High. Turn it up for hard problems, down for chores.
Agents and teammates, together
In one space, Agents can hand work to each other, and teammates can step in to see the results and carry on.
Pricing
Pay for what you use. See the price live.
1 credit = US$1. This is the official pay-as-you-go price right now. If your plan includes this model, plan allowance is used first.Model pricing
Per 1M tokens · USD
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FAQ
About Claude Opus 5.5
Anthropic positions Opus for complex work that takes sustained judgment, and Sonnet for well-scoped daily work. Start with Sonnet, and switch to Opus for the tasks that keep coming back for rework.
Yes. Claude Opus 5.5 is available, and Claude Code, Grok Build, and OpenCode can run it. In your space, pick an Agent, then pick the model.
No. Usage goes straight onto your Agent.Space credits or plan.
By actual usage, deducted from credits at 1 credit = US$1. The live price is in the table on this page. If your plan includes the model, plan allowance is used first, and usage moves to credits once it runs out.
Right now
Get to work with Claude Opus 5.5.
Pick an Agent, choose the model, and leave the rest to your space.