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Claude Opus 5.5
Take on demanding coding, research, and agent tasks with Claude Opus 5.5 — solid results, snappier output, and about 40% less spend.
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Why Claude Opus 5.5 Excels at Complex, Multi-Stage Tasks
It sips less compute than Opus 5, communicates with greater clarity, and carries sprawling agent workflows through to completion sooner.
- Roughly 40% Less Spend on Everyday WorkloadsBecause Claude Opus 5.5 consumes less compute, default settings cut spend by 40%: $4 input, $20 output, and $0.20 for cache reads.
- Answers Arrive Over 30% QuickerToken output from Claude Opus 5.5 outpaces Opus 5 by more than 30%, while Fast mode can push throughput up to 2.5x.
- Writing That Reads NaturallyClaude Opus 5.5 opens with the conclusion, stays easy to follow, and holds up well across sessions that stretch on for hours.
Getting Started With Claude Opus 5.5
Follow three simple steps to point Claude Opus 5.5 at coding, research, or lengthy unattended workloads.
What Claude Opus 5.5 Brings to the Table
Standout strengths of Claude Opus 5.5 include agentic coding, large-scale migrations, injection defenses, research precision, and leaner token use.
Top-Tier Agentic Coding, Leaner Bills
Claude Opus 5.5 posts 54.6% on FrontierCode and 52.5% on CursorBench while charging a fraction of what rivals do for each job.
Migrations and Audits Across Entire Codebases
One tester moved 680,000 lines in under a day; another repaired 200,000 lines in three hours — a job that took Opus 5 twenty.
Harder to Hijack With Prompt Injection
Across coding, tool use, and browsing, Claude Opus 5.5 equals or surpasses Opus 5, and on Gray Swan's test it draws level with Fable 5.1.
Reliable Answers for Research and Knowledge Work
Sixteen of eighteen Claude Opus 5.5 reports passed our quality threshold, and the model lands 1846 Elo on GDPval-AA v2.1.
Finance and Business Analysis That Holds Up
Walleye Capital watched Claude Opus 5.5 clear their suite at the lowest setting, and its merger model finished ahead of Opus 5 in 63 minutes.
Leaner Token Consumption
Lower per-token pricing plus lighter usage per task nets Claude Opus 5.5 a 40% drop, and testers wrapped up in half the turns.
Claude Opus 5.5 — Common Questions Answered
Answers to what people ask most about Claude Opus 5.5: cost, response speed, safety guardrails, and how to get access.
What does Claude Opus 5.5 cost to run?
Input runs $4 and output $20 per million tokens — 20% under Opus 5 — with cache reads at $0.20, so typical workloads land about 40% cheaper.
How quickly does Claude Opus 5.5 respond?
Output streams more than 30% faster than Opus 5, and Fast mode inside Claude Code can climb to 2.5x speed.
Can Claude Opus 5.5 be trusted to run on its own?
It ranks first in our automated behavior audit and rarely attempts hard-to-reverse actions or wanders past the limits it was given.
How does it stack up against Opus 5 and Fable 5.1?
On most tasks Claude Opus 5.5 keeps pace with Claude Fable 5.1 and clearly outpaces Opus 5; in practice the distance is smaller than raw scores imply.
Is Claude Opus 5.5 available for biology or cybersecurity projects?
Screened labs may apply to the Life Sciences Verification Program today, while Cyber Verification Program access opens wider over the next few weeks.
Will subscription usage limits change?
Yes — five-hour caps rise on Pro, Max, Team, and seat-based Enterprise plans, and you get a rate limit reset you can bank and redeem anytime.
Launch Your First Claude Opus 5.5 Task Today
Get going with Claude Opus 5.5 for about 40% less, plus higher five-hour caps and a bankable rate limit reset on subscriptions.