New · Claude 5.5 family · Everyday default
Claude Sonnet 5.5
Claude Sonnet 5.5 is the new everyday default in the Claude line-up. Released in late September 2026, it brings near-Opus quality to well-scoped daily work at half the per-token price of Opus 5.5 — faster, leaner and better at documents, slides and spreadsheets.
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Overview
What is Claude Sonnet 5.5?
Claude Sonnet 5.5 follows Opus 5.5 as the second model in the Claude 5.5 family and is generally available in the Claude apps, Claude Code, Claude Cowork and the API (model ID claude-sonnet-5-5), plus Amazon Bedrock, Google Cloud Vertex AI and Microsoft Foundry. API pricing is $2 per million input tokens and $10 per million output tokens, with a 1M-token context window and up to 128K output tokens. Compared with Sonnet 5 it generates output more than 30% faster and uses up to 30% fewer tokens per task, which lowers real cost per job, not just the list price. Published results show it close to Opus 5.5 on knowledge work and ahead of it on some agentic terminal benchmarks. It also supports configurable effort levels (low, medium, high, xhigh and max), so teams can trade speed for depth per task. For most organisations Sonnet 5.5 should be the model people open first: it handles drafting, analysis, coding and polished deliverables, and leaves Opus 5.5 for the work that genuinely needs it.
Highlights
What Claude Sonnet 5.5 is great at
The new default
The right first choice for the large majority of everyday business and engineering work.
Half the price of Opus
$2 / $10 per million tokens, with 50% off through the Batch API.
30%+ faster
Quicker answers keep people in flow through busy days.
Up to 30% fewer tokens
Leaner on each task, so the real cost per job drops further.
Polished deliverables
Stronger at slides, spreadsheets and formatted documents.
Five effort levels
Low to max effort lets teams balance speed and reasoning depth.
In your workflow
Putting Claude Sonnet 5.5 to work
Make Sonnet 5.5 the model your teams reach for first. It is fast enough to stay interactive and strong enough to finish real work, from a client deck to a bug fix. Escalate to Opus 5.5 only when a task is long, ambiguous or high-stakes.
- Make it your default model
- Use medium effort for daily work
- Raise effort for harder problems
- Escalate to Opus 5.5 only when it pays
Use it for
Where teams use Claude Sonnet 5.5
Everyday drafting
Emails, proposals, reports and content that need little editing afterward.
Spreadsheets & analysis
Clean, model and explain data, and build working spreadsheets.
Slides & documents
Turn notes and data into client-ready decks and formatted documents.
Day-to-day coding
Build features, fix bugs and review code across routine engineering work.
Cowork tasks
Run well-scoped, multi-step tasks in Claude Cowork quickly and cheaply.
High-volume assistants
Power internal assistants where speed and cost both matter.
Training
We train your team to use Claude Sonnet 5.5 well
Getting value from Claude Sonnet 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 Sonnet 5.5 — questions
When should we use Claude Sonnet 5.5?
How much does Claude Sonnet 5.5 cost?
What changed from Sonnet 5?
What is the context window of Sonnet 5.5?
How do you train teams on Sonnet 5.5 and model choice?
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
Book training
Train your team on Claude Sonnet 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.