Claude Opus 5.5
Claude Opus 5.5 is Anthropic's latest Opus model and replaces Opus 5. It sets a new high score on CursorBench, ahead of Fable 5.1, and costs 20% less than Opus 5 per token. We recommend the high thinking variant for the best results.
Strengths
- Highest CursorBench score of any model in Cursor at launch, at standard Opus pricing rather than Fable pricing.
- Clearer communication than earlier Opus models. It explains what it did and why without over-elaborating, which makes long agent sessions easier to follow.
- Strong at front-end and UI work. Early testers used it to design and build complete interfaces from scratch.
- Works well as a coordinator for subagents. It delegates cleanly and keeps the parent task on track across long runs.
- Zero Data Retention compatible. Like earlier Opus models, and unlike Fable 5.1, Opus 5.5 has no data-retention requirements for general access. Teams using ZDR with Opus today can keep that setup with Opus 5.5.
Limitations
- Still an Opus-tier price. It consumes the Other Models pool faster than Sonnet 5 or Composer.
Tools
Opus 5.5 has access to all agent tools when used with Cursor including:
Find files by name, read directory structures, and grep for patterns.
Generate search queries and fetch results from the web.
Read file contents, including images for vision-capable models.
Suggest edits and apply them automatically.
Execute terminal commands and monitor output.
Control a browser to take screenshots, test applications, and verify visual changes. See the Browser documentation.
Generate images from text descriptions or reference images.
Ask clarifying questions while continuing to work in the background.
Retrieve rules based on type and description.
Learn more about how tools work and tool calling fundamentals.
Pricing
Cursor plans include two usage pools. Opus 5.5 draws from the third-party Other Models pool, which charges at the rates below. All prices are per million tokens.
| Name | ||||
|---|---|---|---|---|
| $4 | $5 | $0.2 | $20 | |
| $8 | $10 | $0.4 | $40 |
Opus 5.5 bills at $4 per million input tokens and $20 per million output tokens, down from $5 and $25 for Opus 5. Prompt-cache reads are $0.20 per million tokens (0.05x the input rate), down from 0.10x on Opus 5.
A Fast mode tier (claude-opus-5-5-fast) is available at launch for higher-priority output. On legacy request-based plans, it requires Max Mode. It bills at $8/M input and $40/M output tokens. Use it selectively for time-sensitive or critical work.
Global endpoints use the rates above. Regional and US-only endpoints are priced 10% higher, at $4.40/M input and $22/M output tokens. See Privacy and Data Governance for data residency details.
All Opus 5.5 prompts bill at the base per-token rates in the table above, including when context goes above 300k. There is no separate long-context multiplier for Opus 5.5. Context windows up to 1M tokens use the same rates.
Opus 5.5 supports a thinking variant for deeper reasoning. We recommend using the high thinking variant for the strongest results.