Claude Sonnet 5.5
Claude Sonnet 5.5 is Anthropic's direct upgrade to Claude Sonnet 5, aimed at well-scoped everyday work rather than frontier research problems. It is especially strong at building features, fixing bugs and producing clean code you can ship. Available on Hoodgen AI at half the price of Opus.
Technical Specifications
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What is Claude Sonnet 5.5?
Claude Sonnet 5.5 is the middle tier of Anthropic's 5.5 generation and the one most teams end up using every day. It succeeds Claude Sonnet 5 as a direct drop-in upgrade: same role, better output. It handles feature work, bug fixing, code review and mid-sized refactors, accepts text, images and files, and keeps the same 1M-token context window as its bigger siblings.
Features & Capabilities
Daily Coding
Feature builds, bug fixes and refactors at a price that supports daily use.
Strong Reasoning
Handles multi-step logic without reaching for the flagship tier.
1M Context
A whole service or a long specification in one conversation.
Vision and File Input
Screenshots, diagrams and documents alongside your prompt.
128K Output
Complete files and long explanations in a single response.
Half of Opus
$2.00 per million input tokens - flagship context at half the flagship price.
Who Is Claude Sonnet 5.5 For?
Feature Development
Shipping well-scoped features with tests and clean structure.
Bug Fixing
Reading a stack trace, finding the cause and patching it.
Code Review
Catching real defects in a diff instead of nitpicking style.
Everyday Agent Work
Tool-using agents that run often enough that cost matters.
Claude Sonnet 5.5 Pricing
- $2.00 per million input tokens, $10.00 per million output tokens
- Half the input price of Claude Opus 5.5 with the same 1M context
- Run it from your Hoodgen free credits, no credit card required
- Higher allowances on Hoodgen AI paid plans
What Makes Claude Sonnet 5.5 Different?
Sonnet 5.5 is the tier most people should default to. It inherits the same 1M-token context window and 128,000-token output ceiling as Opus 5.5, so the practical difference is not how much it can hold but how hard a problem it can reason through before it starts to slip. For feature work, bug fixing and routine refactors, that ceiling is comfortably above what the task needs.
The upgrade over Sonnet 5 is a direct one: same role, better output, no API changes to think about. If you had prompts tuned for Sonnet 5 they keep working, which makes this the lowest-friction way to move a codebase forward.
The economics are the other half of the story. At $2 per million input tokens and $10 per million output, running Sonnet 5.5 as your default and reserving Opus 5.5 for the genuinely hard steps is usually cheaper than running one expensive model everywhere, and it produces about the same result on ordinary work.
Claude Sonnet 5.5 Performance & Pricing
Sonnet 5.5 sits between Haiku 5.5 and Opus 5.5. All three share a 1M-token context window, so the tier you pick is about how hard the reasoning gets, not how much context you need.
What Can You Do With Claude Sonnet 5.5?
Sonnet 5.5 is the model to leave selected for a normal working day. It is strong enough that reaching for the flagship is the exception, and cheap enough that you do not have to ration it.
Best Use Cases
- Building and iterating on features
- Fixing bugs from a stack trace
- Reviewing pull requests
- Writing and updating tests
- Long-form technical writing from a specification
Claude Sonnet 5.5 Privacy & Data Policy
Claude Sonnet 5.5 is developed by Anthropic and served through OpenRouter. Prompts and completions are processed by Anthropic under Anthropic terms.
Avoid pasting passwords, personal data or source code you would not share with an external provider. Hoodgen AI keeps cheaper and free alternatives on the same account so you can switch without losing context.
Claude Sonnet 5.5 vs Other Models
Frequently Asked Questions
The Claude to use every day
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