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What is Claude Sonnet 5?

Claude Sonnet 5 is Anthropic's latest AI model engineered to deliver highly capable agentic performance for developers, enterprises, and organizations building next-generation AI applications. The model expands the capabilities of the Sonnet family by enabling autonomous planning, browser interaction, terminal usage, tool calling, coding assistance, and complex reasoning while remaining significantly more affordable than larger AI models. Anthropic designed Sonnet 5 to close much of the performance gap between previous Sonnet releases and the company's Opus models, offering major improvements in coding, knowledge work, reasoning, and long-running autonomous tasks. The model demonstrates stronger performance across numerous benchmark evaluations while also improving safety through lower hallucination rates, reduced sycophancy, improved refusal of malicious requests, and greater resilience against prompt injection attacks. Anthropic notes that Sonnet 5 also has substantially lower cybersecurity capabilities than its most advanced Opus models, reducing certain categories of misuse risk while still supporting legitimate development work. Developers can access Sonnet 5 through every Claude subscription tier, Claude Code, and the Claude API using introductory token pricing before standard pricing takes effect. The API allows organizations to integrate Sonnet 5 into production software while selecting different effort levels to optimize cost, latency, and capability for individual workloads. Anthropic also increased platform rate limits to support the higher token usage associated with advanced agentic workflows. Safety safeguards for cybersecurity-related requests are enabled by default, reflecting the model's improved autonomous capabilities while maintaining appropriate protections.

What is Claude Opus 5?

Claude Opus 5 is Anthropic’s advanced Opus model designed for high-value coding, knowledge work, problem-solving, automation, scientific research, and everyday AI workflows. The model is positioned as a thoughtful and proactive system that approaches the frontier intelligence of Claude Fable 5 at half the price. Anthropic says Claude Opus 5 delivers greatly improved performance for the same cost as Opus 4.8, with base pricing of $5 per million input tokens and $25 per million output tokens. The model supports effort settings that allow customers to optimize for deeper intelligence or conserve tokens for faster and cheaper results. Claude Opus 5 performs especially well on software engineering evaluations, including tasks that require debugging, code generation, root-cause analysis, test creation, and multi-step implementation. It also shows strong results on knowledge work, business automation, computer use, novel problem solving, and research-heavy tasks. Anthropic highlights that Opus 5 is better at checking its own work, iterating until it succeeds, and building supporting tools when a task requires it. The model improves on Opus 4.8 across life sciences evaluations, including structural biology, organic chemistry, bioinformatics, molecular structure inference, and protein function tasks. Claude Opus 5 includes alignment and safety protections that aim to allow beneficial cybersecurity and biology use cases while restricting riskier exploit generation, penetration testing, and certain autonomous misuse scenarios. It is available on Claude Max as the default model, on Claude Pro as the strongest model, and through the Claude API as claude-opus-5, with a Fast mode that runs around 2.5 times the default speed.

Media

Media

Integrations Supported

C
C#
CSS
Claude
Claude Code
Claude Max
Claude Security
Dart
Go
HTML
JavaScript
Kubernetes
Objective-C
PowerShell
Python
Ruby
Solidity
Swift
TypeScript
XML

Integrations Supported

C
C#
CSS
Claude
Claude Code
Claude Max
Claude Security
Dart
Go
HTML
JavaScript
Kubernetes
Objective-C
PowerShell
Python
Ruby
Solidity
Swift
TypeScript
XML

API Availability

Has API

API Availability

Has API

Pricing Information

$2 per 1M tokens (input)
$2 per million input tokens and $10 per million output tokens through August 31, 2026, after which it will be priced at $3 per million input tokens and $15 per million output tokens
Free Trial Offered?
Free Version

Pricing Information

$5 per 1M tokens (input)
$5 per million input tokens and $25 per million output tokens
Free Trial Offered?
Free Version

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Anthropic

Date Founded

2021

Company Location

United States

Company Website

claude.ai

Company Facts

Organization Name

Anthropic

Date Founded

2021

Company Location

United States

Company Website

claude.ai

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