/ Models Index / Claude Sonnet 4.6

Claude Sonnet 4.6

Frontier · Anthropic · Anthropic · Released Mar 2026
A

Excellent (A) — Capability Grade

Claude Sonnet 4.6 sits in the rare position of delivering frontier-tier reasoning at mid-tier pricing. Strong SWE-Bench, GPQA, and tool-use scores. The price-performance leader in the current API generation. Widely deployed in production at scale across enterprise customers.

92
Composite / 100
/ Subscore Breakdown · 6 Capability Dimensions

Where this grade comes from.

General Reasoning
A-
Code Generation
A
Math & STEM
A-
Tool Use & Agency
A
Multimodal
A-
Safety & Alignment
A
/ Key Events & Disclosures

Release timeline & positioning.

  • Released Mar 2026
  • Price-performance category leader
  • 500K context
  • Strong production deployment volume

/ Best for

Production workloads at scale — Claude Sonnet 4.6 is the default choice for code generation, agentic workflows, and reasoning where Opus pricing is prohibitive.

/ Watch out for

For pure throughput-cost optimization, Haiku 4.5 or open-weights alternatives may suit specific use cases.