New · Claude 5.5 family · Flagship
Claude Opus 5.5
Claude Opus 5.5 is Anthropic’s new flagship, released on 22 September 2026. It delivers Fable-class results on most business and engineering work at a much lower cost, and it is now the model to reach for when the task is long, ambiguous or high-stakes.
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Overview
What is Claude Opus 5.5?
Claude Opus 5.5 is the first model in the Claude 5.5 family. Anthropic positions it as performing at the level of Claude Fable 5.1 on most tasks while costing roughly 40% less to run than Opus 5, and generating output more than 30% faster. On Anthropic’s published benchmarks it matches or beats Fable 5.1 on agentic coding, knowledge work, computer use, chart understanding and multidisciplinary reasoning. API pricing is $4 per million input tokens and $20 per million output tokens, with a 1M-token context window and up to 128K output tokens. It is available in the Claude apps, Claude Code, Claude Cowork and the API, as well as Amazon Bedrock, Google Cloud Vertex AI and Microsoft Foundry. For corporate teams this changes the economics: work that used to justify the frontier model — multi-step analysis, large code migrations, long-document reviews, agentic workflows — can now run on Opus 5.5 by default. The skill is knowing when that extra depth pays for itself and when Sonnet 5.5 is enough.
Highlights
What Claude Opus 5.5 is great at
Fable-class quality
Matches Claude Fable 5.1 on most tasks Anthropic tested, at a fraction of the price.
About 40% cheaper
$4 / $20 per million tokens, with 50% off through the Batch API.
30%+ faster output
Noticeably quicker long answers, reports and code than Opus 5.
1M-token context
Read whole contracts, data rooms or codebases in a single session.
Built for agents
Strong on long-running, multi-step work in Claude Code and Claude Cowork.
Clearer writing
More direct, less padded prose that needs less editing before it goes out.
In your workflow
Putting Claude Opus 5.5 to work
Use Opus 5.5 where a wrong or shallow answer is expensive: board papers, investment memos, contract reviews, architecture decisions and long agentic tasks. Pair it with Sonnet 5.5 for everyday drafting so spend stays sensible.
- Default for complex, multi-step work
- Run long Cowork and Claude Code tasks
- Review large documents in one pass
- Escalate from Sonnet 5.5 only when it pays
Use it for
Where teams use Claude Opus 5.5
Contract & policy review
Compare long agreements against your playbook and flag deviations with citations.
Large code migrations
Plan and execute refactors, upgrades and audits across big repositories.
Strategy & analysis
Build investment memos, market analyses and scenario models that hold up to scrutiny.
Agentic workflows
Run multi-hour tasks in Claude Cowork that touch files, spreadsheets and connectors.
Research synthesis
Pull dozens of sources into one defensible brief with clear reasoning.
Security review
Audit code and configurations with stronger reasoning and safeguards.
Training
We train your team to use Claude Opus 5.5 well
Getting value from Claude Opus 5.5 is a skill — we teach it hands-on, on your real work.
Hands-on & tailored
Every example built from your team's real work and your industry.
Safe & governed
Clear guardrails on what to share, verify, and where AI belongs.
Fast to value
Confident daily use in days, not quarters — with follow-up that sticks.
FAQ
Claude Opus 5.5 — questions
When should we use Claude Opus 5.5?
How much does Claude Opus 5.5 cost?
How does Opus 5.5 compare with Fable 5.1 and Sonnet 5.5?
What is the context window of Opus 5.5?
Do you offer Claude Opus 5.5 training for corporate teams?
Who delivers it
Anthropic-certified Claude trainers
Every programme is delivered by Anthropic Claude Certified trainers who use Claude daily on live client work — engineering, analysis, research and content. We have trained 200,000+ professionals across 16+ countries for 600+ enterprise clients, including Tata Group, Adani, Siemens, GE Aerospace, HUL, Flipkart and Air India.
- Anthropic Claude Certified trainers, not generalist AI speakers
- 200,000+ professionals trained across 16+ countries
- 600+ enterprise clients, from BFSI and manufacturing to public sector
- Delivered in English, Hindi and Hinglish
Trusted by
Teams we’ve trained
…and 200+ organisations, across 16+ countries.
What participants say
Real feedback from real sessions
Verified feedback collected from participants across corporate sessions — average rating 4.8/5.
“A very productive session for working professionals. A must-do.”
“The session was highly insightful and conducted in a very professional and interactive manner. Learnt about AI and excited to learn more!”
“Highly recommended! Hands-on and directly useful — from making PPTs and strategic plans to building KRAs.”
“Great work done by Mr Hitesh in the AI landscape — a true subject-matter expert. More power to him for spreading this knowledge.”
“I would recommend everyone to go through this session — it clarifies both what to expect from AI and where AI isn’t needed.”
“Amazing session by Hitesh. The AI tools he shared are very helpful for day-to-day work.”
“Mr Hitesh Motwani is a very informative trainer. The way he delivers training is awesome.”
“Mr Hitesh Motwani delivered a valuable, informative session and showed us exactly how to use AI tools to enhance our work. Thank you so much.”
“A nice interactive session with a lot of new insights and the power of AI. This will help me save time in routine activities.”
“A very good training session. AI can do wonders — we’ll implement it to create efficiency and save time.”
“Hitesh was very informative and knowledgeable about AI tools. It will let me use my time far more effectively.”
“Your session helped me walk into the world of magic.”
Explore more
Keep going with Claude AI training
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Train your team on Claude Opus 5.5
Tell us your team, tools and goals. We will scope a tailored workshop and send a fixed proposal — usually within one business day.