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Claude Sonnet

Anthropic’s balanced Claude tier — strong quality at lower latency and cost than Opus, widely used for production agents and coding.

Vision · Tool calling · Thinking · MCP · Coding

Last reviewed: 24 July 2026

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Overview

Anthropic’s balanced Claude tier — strong quality at lower latency and cost than Opus, widely used for production agents and coding.

Capabilities

  • Vision: Yes
  • Audio: No
  • Tool calling: Yes
  • Thinking: Yes
  • MCP: Yes
  • Coding: Yes
  • Structured output: Yes

Technical specifications

Provider
Anthropic
License
Proprietary
Context window
200K
Parameters
Undisclosed
Release
2025
Modalities
Text, Image
Vision
Yes
Audio
No
Tool calling
Yes
Thinking
Yes
MCP
Yes
Open weights
No
API
Yes
Pricing (input)
API tiered (see Anthropic pricing)
Pricing (output)
API tiered (see Anthropic pricing)

Supported modalities

Text · Image

Context window

200K (200,000 tokens)

Pricing

Input: API tiered (see Anthropic pricing)
Output: API tiered (see Anthropic pricing)

Availability

API: Yes
Chat UI: Yes
Open weights: No

Use cases

  • Production chat and support agents
  • IDE coding assistants
  • RAG answer generation
  • Structured extraction pipelines

Strengths

  • Strong quality / cost balance
  • Reliable tool use for agents
  • Widely available across clouds

Limitations

  • Not the absolute peak of Claude capability (vs Opus)
  • Closed weights

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