Flash Sale 50% Off!

Don't miss out on our amazing 50% flash sale. Limited time only!

Sale ends in:

Get an additional 10% discount on any plan!

SPECIAL10
See Pricing
×

Daily Limit Reached

You have exhausted your limit of free daily generations. To get more free generations, consider upgrading to our unlimited plan for $4/month or come back tomorrow.

Get an additional 10% discount on any plan!

SPECIAL10
Upgrade Now
Save $385/Month - Unlock All AI Tools →

Upgrade to Premium

Thank you for creating an account! To continue using AI4Chat's premium features, please upgrade to a paid plan.

Access to all premium features
Priority customer support
Regular updates and new features - See our changelog
View Pricing Plans
7-Day Money Back Guarantee
Not satisfied? Get a full refund, no questions asked.
×

Credits Exhausted

You have used up all your available credits. Upgrade to a paid plan to get more credits and continue generating content.

Upgrade Now

You do not have enough credits to generate this output.

Top-Tier Reasoning

Claude Sonnet 4.5

Claude Sonnet 4.5 is the world's best coding model, excelling in complex agentic tasks, computer use, and multi-hour autonomous workflows with superior reasoning, math, and domain expertise in finance, law, and STEM. Unlock unprecedented efficiency for building intelligent systems that handle real-world challenges with precision and reliability.

200k Context
Top-Tier Intelligence
Sep '25 Knowledge

Available for Chat, Vision, and File Uploads.

Performance Benchmarks

SWE-bench Verified
77.2%
MMLU-Pro
87.36%
GPQA
83.4%

How do you want to interact?

Start a Conversation

Ask anything.
Have a natural conversation, brainstorm ideas, draft emails, or ask for advice.

Start Chatting

Use a Persona

Specialized Experts.
Instruct the AI to act as a Coding Tutor, Marketing Expert, or Travel Guide.

Pick a Persona

Why use Claude Sonnet 4.5?

Capability Examples

Long Context Code Review
Review this entire 50k-token codebase for bugs, suggest refactors, and output fixed multi-file updates in a zip-ready format.
Analyzed full codebase in one pass using 200k context. Found 12 bugs (e.g., race conditions in async handlers), refactored for better modularity with TypeScript patterns. Generated 15 updated files with diffs—total output 45k tokens. Ready for deploy.
Agentic Cybersecurity Scan
Act as a security agent: scan this vulnerability report dataset (20 docs), identify top risks, patch code autonomously via shell tools, and summarize in a report.
Coordinated 3 sub-agents: parsed 20 reports (reduced intake time 44%), ran bash vulnerability scans, auto-patched 8 exploits in codebase. Final report: 5 critical risks mitigated, accuracy +25%. Executed in 200k context with tool cleanup.

How to use

1
Go to Chat

Navigate to the "AI Chat" page.

2
Select Model

Ensure Claude Sonnet 4.5 is selected.

3
Type Prompt

Ask a question or paste code.

4
Interact

Refine the answer by replying to the AI.

Compare LLMs Side-by-Side

Is Claude Sonnet 4.5 better than Claude 3.5 or Gemini? Test same prompts simultaneously in the Chat Playground.

Open Chat Playground

Made with ❤ by AI4Chat