Claude 3.7 Sonnet
Last Updated on: Nov 29, 2025
Claude 3.7 Sonnet
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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.
Photos & Videos
Screenshot 1
Pricing
Freemium

Free

$ 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

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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Popular Mention

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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