Activefrontierllm Proprietary

Claude 3.7 Sonnet

by Anthropic· Released February 2025· Cutoff February 2025

Claude 3.7 Sonnet is Anthropic's most intelligent model to date, combining rapid responses with extended thinking for complex tasks. It is a hybrid reasoning model that can produce near-instant answers or engage in deep, step-by-step reasoning, making it ideal for coding, math, and nuanced analysis.

Official Site API Docs

Input cost

$3.00 per 1M tokens

Output cost

$15.00 per 1M tokens

Context window

200K tokens

Max output

8192 tokens (standard), 64000 tokens (extended thinking)

Modalities

textimage

License

proprietary

Capabilities

Extended ThinkingFunction CallingVisionCode GenerationStreamingJSON ModeTool UseMultilingual

Best For

Complex coding, math, and reasoning tasks requiring deep analysis or rapid answers.

Strengths

Top-tier coding and math performance
Hybrid reasoning: fast responses or deep thinking
Large 200K context window
Strong vision capabilities
Excellent at agentic tasks and tool use

Limitations

Higher cost than smaller models
Extended thinking mode increases latency
Not multimodal beyond image input
May overthink simple queries if not configured properly

Use Cases

Advanced software development and debugging

Complex mathematical problem solving

Data analysis and scientific research

Legal document analysis and contract review

Customer support automation with reasoning

Content generation requiring deep understanding

Agentic workflows with tool orchestration

Improvements Over Previous Model

Extended thinking mode for deep reasoning, a new capability not present in Claude 3.5 Sonnet
Improved coding benchmark scores (e.g., SWE-bench verified 62.3% vs 49.2% for 3.5 Sonnet)
Enhanced vision capabilities with better chart and diagram understanding
Same pricing as Claude 3.5 Sonnet ($3/$15 per 1M tokens)
Larger max output tokens: 64K in extended thinking vs 8K standard
Improved agentic performance and tool use reliability

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