Claude 4.0: Anthropic’s Most Powerful AI Yet

Anthropic has officially launched Claude 4.0, marking a major leap forward in AI capabilities. With two new models—Claude Opus 4 and Claude Sonnet 4—this release brings enhanced reasoning, coding, and agentic workflows to the forefront. Whether you're a developer, researcher, or business innovator, Claude 4.0 offers tools that are smarter, faster, and more adaptable than ever before.

1. Claude Opus 4: The New Benchmark in AI Coding

Claude Opus 4 is now considered the top performer in AI coding. It leads industry benchmarks with:

• 72.5% on SWE-bench

• 43.2% on Terminal-bench

This model is designed for long-running, complex tasks and can sustain performance over extended sessions—ideal for agent workflows and deep problem-solving [1].

2. Extended Thinking and Tool Use

Claude 4 introduces “extended thinking”, a beta feature that allows the model to alternate between reasoning and using tools like web search. This results in more accurate and context-aware responses, especially for multi-step or research-heavy queries [1].

3. Parallel Tool Use and Memory

Claude 4 can now use multiple tools in parallel and access local files (with permission). It also supports memory across sessions, enabling better continuity and long-term task handling [1].

4. Claude Code Goes Public

Anthropic’s AI coding assistant, Claude Code, is now generally available. It integrates with:

• VS Code

• JetBrains

• GitHub Actions

It offers inline suggestions, background task support, and even CI error resolution [1].

5. Claude Sonnet 4: Balanced Power and Speed

Sonnet 4 builds on the success of Claude 3.7 Sonnet with improved instruction following, reasoning, and coding. It scores 72.7% on SWE-bench, making it a practical choice for everyday use cases [1].

6. Developer-Centric API Enhancements

Claude 4’s API now includes:

• Code execution tool

• MCP connector

• Files API

• Prompt caching (up to 1 hour)

These features are tailored for developers building complex agents and applications [1].

7. Claude Code SDK and GitHub Integration

The new Claude Code SDK allows developers to build custom tools and agents. A GitHub integration (in beta) enables Claude to respond to PR feedback and fix CI errors directly [1].

8. Pricing and Availability

Despite the upgrades, pricing remains unchanged:

• Opus 4: $15 (input) / $75 (output) per million tokens

• Sonnet 4: $3 (input) / $15 (output) per million tokens

Sonnet 4 is also available to free-tier users [1].

9. Smarter, Safer AI

Anthropic reports a 65% reduction in shortcut behavior, meaning Claude 4 is less likely to exploit loopholes in agentic tasks—making it more reliable and aligned with user intent [1].

Claude 4.0 is more than just an upgrade—it’s a reimagining of what AI can do. Whether you're building intelligent agents, writing code, or solving complex problems, Claude 4.0 is designed to be your most capable assistant yet.

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References

[1] Claude 4 Is Here: 10 Big Changes You Should Know - Geekflare