Anthropic: Claude Sonnet 4.6

Image input Text input Text output
Author's Description

Sonnet 4.6 is Anthropic's most capable Sonnet-class model yet, with frontier performance across coding, agents, and professional work. It excels at iterative development, complex codebase navigation, end-to-end project management with memory, polished document creation, and confident computer use for web QA and workflow automation.

Key Specifications
Cost
$$$$$
Context
1M
Released
Feb 17, 2026
Speed
Ability
Reliability
Supported Parameters

This model supports the following parameters:

Tools Response Format Structured Outputs Temperature Top P Tool Choice Max Tokens Stop Reasoning Include Reasoning
Features

This model supports the following features:

Reasoning Structured Outputs Tools Response Format
Performance Summary

Anthropic's Claude Sonnet 4.6, created on Feb 17, 2026, demonstrates competitive response times, ranking in the 58th percentile across benchmarks. However, it is positioned at a premium price point, falling into the 13th percentile for cost. A standout feature is its exceptional reliability, achieving a perfect 100% success rate across all evaluated benchmarks, indicating robust technical stability. Sonnet 4.6 exhibits frontier performance across several key areas. It achieved perfect accuracy in both General Knowledge and Ethics, with the latter also being the most accurate model at its price point and speed. Its Coding and Mathematics capabilities are strong, scoring 94% accuracy and ranking in the 88th and 82nd percentiles respectively. The model also shows strong reasoning abilities (88% accuracy) and solid instruction following (70% accuracy). While its Email Classification (97% accuracy) is good, it ranks in the 42nd percentile, suggesting room for improvement relative to peers. Its hallucination rate is commendably low at 98% accuracy. Overall, Sonnet 4.6 excels in complex cognitive tasks and professional applications, making it highly suitable for iterative development, project management, and polished document creation.

Model Pricing

Current Pricing

Feature Price (per 1M tokens)
Prompt $3
Completion $15
Input Cache Read $0.3
Input Cache Write $3.75
Web Search $10000

Price History

Available Endpoints
Provider Endpoint Name Context Length Pricing (Input) Pricing (Output)
Anthropic
Anthropic | anthropic/claude-4.6-sonnet-20260217 1M $3 / 1M tokens $15 / 1M tokens
Amazon Bedrock
Amazon Bedrock | anthropic/claude-4.6-sonnet-20260217 1M $3 / 1M tokens $15 / 1M tokens
Google
Google | anthropic/claude-4.6-sonnet-20260217 1M $3 / 1M tokens $15 / 1M tokens
Benchmark Results
Benchmark Category Reasoning Strategy Free Executions Accuracy Cost Duration
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