# claude-opus-5-5 — API, Pricing & Context Window | Vivgrid

> Source: https://vivgrid.com/docs/models/claude-opus-5-5

Run Anthropic's claude-opus-5-5 on Vivgrid: the latest Opus model for long-running agentic coding, with a 1M-token context window, 128K max output, and geo-distributed acceleration.

`claude-opus-5-5` is the latest model in Anthropic's Opus tier, built for long-running agentic coding and knowledge work. It keeps the **1M-token context window** and **128K-token max output** of `claude-opus-5`, runs with always-on adaptive thinking, and costs less per token than the model it succeeds.

On Vivgrid, `claude-opus-5-5` is served through the native **Messages API** (`/messages`) with geo-distributed acceleration across **AMER, EMEA, and APAC**. It uses the same unified Vivgrid API key as the rest of the catalog, so moving an agent from `claude-opus-5` is a model-string change.

<ModelSpec slug="claude-opus-5-5" />

Prompt caching is billed at **$5.00 per 1M cache-write tokens** on the 5-minute TTL and **$8.00 per 1M** on the 1-hour TTL, with cached reads at $0.20.

## Ideal use cases

- Long-running coding agents and autonomous software development
- Whole-codebase analysis, migration, and large refactoring projects
- Knowledge work that chains many tool calls across a long session
- Teams on `claude-opus-5` looking for the same context budget at a lower price

## Related models

- [claude-fable-5-1](/docs/models/claude-fable-5-1) — Anthropic's most capable model
- [claude-opus-5](/docs/models/claude-opus-5) — the prior Opus release
- [gpt-6-sol](/docs/models/gpt-6-sol) — OpenAI's balanced gpt-6 model