Claude 3.5 Sonnet Freemium

Claude 3.5 Sonnet is Anthropic’s mid-tier model, released in June 2024 and updated in October. It has a 200K token context window, scores strongly on coding and writing, and costs $3 per million input tokens. An experimental computer-use API lets it control a desktop.

What is Claude 3.5 Sonnet?

Claude 3.5 Sonnet sits in the middle of Anthropic’s model line, between Haiku and Opus. When it launched it outperformed the larger Claude 3 Opus on most benchmarks at roughly a fifth of the price, which was unusual at the time and made it Anthropic’s de facto default.

The October 2024 revision added an Artifacts window for live code preview and, more interestingly, a computer-use capability that lets the model move a cursor, click and type.

What are Claude 3.5 Sonnet’s standout features?

• 200K context window. Roughly 500 pages per prompt, with 8K output tokens.
• Coding strength. It scored 92% on HumanEval and 49% on SWE-bench Verified in Anthropic’s testing.
• Artifacts. Renders code, diagrams and documents in a side panel you can iterate on.
• Computer use. Experimental API for screenshot-based desktop control.
• Vision. Reads charts, handwriting and screenshots.
• Projects. Persistent knowledge bases that keep context across chats.

How much does Claude 3.5 Sonnet cost?

• Free tier. Limited daily messages on claude.ai.
• Pro. $20 per month for higher limits and Projects.
• API. $3 per million input tokens and $15 per million output tokens.
• Batch and caching. 50% off for batch jobs and 90% off cached reads, which cuts real bills noticeably.

Who is Claude 3.5 Sonnet for?

Developers who want strong code generation without GPT-4-class prices are the obvious audience. Writers also tend to prefer its register: it produces fewer of the stock phrases that make ChatGPT output obvious.

Two caveats. It is now a generation behind Claude 4 models, so check pricing before starting new work, and the computer-use API is slow and error-prone, fine for research demos, not for unattended production.

Use Cases

• Refactoring and reviewing large code files
• Writing and editing long-form articles
• Turning screenshots and charts into structured text
• Building RAG apps with a 200K context budget
• Research on desktop-automation agents

Quick Summary

• Claude 3.5 Sonnet is Anthropic’s mid-tier model with a 200K-token context window.
• It outperformed the larger Claude 3 Opus at launch for roughly a fifth of the price.
• API pricing is $3 per million input tokens and $15 per million output tokens.
• The computer-use API is experimental and slow, not production-ready.
• Strong for coding and writing; superseded by newer Claude 4 models.