general-purpose

Claude Sonnet 4.6

by Anthropic

Claude Sonnet 4.6 is Anthropic's mid-tier large language model in the Claude 4 generation, offering a 1 million token context window at generally available flat pricing of $3 per million input tokens and $15 per million output tokens. It is designed to balance high capability with cost-efficiency, supporting a broad range of tasks including coding, analysis, writing, summarization, and long-context document processing. The model sits between Haiku (lightweight) and Opus (highest capability) in Anthropic's model family lineup.

8 Overall Score

Scores

Capability
8
Ease of Use
8
Documentation
9
Reliability
8
Value
8
Momentum
9

Details

Status
active
Pricing
paid
Launch Date
2025-10
Last Updated
2026-03-15

Key Features

  • 1 million token context window (GA)
  • Flat pricing at $3/$15 per million input/output tokens
  • Mid-tier capability balancing performance and cost
  • Broad task support: coding, writing, analysis, summarization
  • Available via Anthropic API and Claude.ai interface

Tech Stack

Transformer architecturePythonAnthropic APIConstitutional AIRLHF