Claude 3.7 Sonnet
Last Updated on: Sep 12, 2025
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What is Claude 3.7 Sonnet?
Claude 3.7 Sonnet is Anthropic’s first hybrid reasoning AI model, combining fast, near-instant replies with optional step-by-step “extended thinking” in a single model. It’s their most intelligent Sonnet release yet—excelling at coding, math, planning, vision, and agentic tasks—while maintaining the same cost and speed structure .
Who can use Claude 3.7 Sonnet & how?
- Software Developers & Engineers: Benefit from advanced reasoning, front-end code generation, and a new agentic coding tool.
- Data Analysts & Scientists: Handle complex math, physics, chart interpretation, and data extraction tasks.
- Automation & Productivity Teams: Use “extended thinking” for multi-step planning and task execution; ideal for agentic workflows.
- Enterprises & API Users: Integrate via Anthropic API, Amazon Bedrock, Google Vertex AI, Databricks, or other platforms.
- Students & Academics: Tap into strong math, science, and multi-step problem-solving capabilities.
- Content Creators & Planners: Generate in-depth strategy, planning, and creative content with reliable traceability.
How to Use Claude 3.7 Sonnet?
- Access & Enable: Available via Claude.ai (Free, Pro, Team, Enterprise), Anthropic API, AWS Bedrock, Google Vertex AI, Snowflake Cortex AI, and Databricks.
- Choose Thinking Mode: Use standard mode for instant answers or extended thinking mode for step-by-step reasoning.
- Set Reasoning Budget in API: Control how much it “thinks” (up to 128K tokens), balancing cost and depth.
- Use Claude Code: Run agentic coding directly from the terminal via command-line interface (research preview).
- Generate & Refine: Interact through the Claude UI with visualized chain-of-thought (“Artifacts” window), prompt for code, math, or complex reasoning.
What's so unique or special about Claude 3.7 Sonnet?
- Hybrid Reasoning in One Model: Combines instant responses with extended chain-of-thought in a single model—no need to swap models.
- Visible Chain-of-Thought: Users can observe the model’s reasoning steps when extended thinking mode is enabled.
- Top-Tier Coding & Agentic Tools: Leads benchmarks on SWE-bench, TAU-bench; includes Claude Code for CLI workflows.
- Extended Context Windows: Supports outputs up to 128K tokens—ideal for large reasoning or code generation tasks.
- Broad Platform Availability: Accessible across Claude web/app, API, Bedrock, Vertex AI, Cortex AI, Databricks.
- Cost-Effective Performance: Fast runtime with cost-efficiency—same pricing as Claude 3.5 while doubling output capabilities.
Things We Like
- Hybrid agility: seamless switch between quick answers and deep reasoning.
- Transparent thought: extended mode shows working logic.
- Frontier-tier coding: excels in real-world programming benchmarks.
- Flexible deployment: accessible across API and major cloud platforms.
- Token-controlled depth: trade off speed, cost, and detail via thinking budget.
Things We Don't Like
- Extended thinking still experimental: confined to paid tiers and may overthink.
- Potential latency: deeper reasoning increases response time.
- Cost/benefit judgement: users must manage thinking token budgets to control cost.
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Pricing
FreemiumFree
$ 0.00
Free on Claude.ai and Claude iOS app with limited queries per day. Features..
- Chat on web, iOS, and Android
- Generate code and visualize data
- Write, edit, and create content
- Analyze text and images
- Ability to search the web
Pro
$20/month
Access to Research
Connect Google Workspace: email, calendar, and docs
Connect any context or tool through Integrations with remote MCP
Extended thinking for complex work
Ability to use more Claude models
Connect Google Workspace: email, calendar, and docs
Connect any context or tool through Integrations with remote MCP
Extended thinking for complex work
Ability to use more Claude models
Max
$100/month
- Choose 5x or 20x more usage than Pro
- Higher output limits for all tasks
- Early access to advanced Claude features
- Priority access at high traffic times
API Usage
$3/$15 per 1M tokens
- $3 per million input tokens & $15 per million output tokens
- Prompt caching write - $3.75 / MTok
- Prompt caching read - $0.30 / MTok
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FAQs
It’s a unified model that handles both fast responses and visible, step-by-step deep thinking—without switching models
In the Claude interface or API, choose “extended thinking” to instruct Claude to reflect before answering, or set a thinking-token limit via API
Yes—Claude Code (in limited preview) lets developers operate on codebases via CLI: search, edit, test, and commit
Claude 3.7 Sonnet leads SWE‑bench Verified and TAU‑bench and shows strong improvements in front-end development
Yes—accessible via Amazon Bedrock and Google Vertex AI since Feb 2025, with enterprise-grade integration
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This page was researched and written by the ATB Editorial Team. Our team researches each AI tool by reviewing its official website, testing features, exploring real use cases, and considering user feedback. Every page is fact-checked and regularly updated to ensure the information stays accurate, neutral, and useful for our readers.
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