Claude Sonnet 4.6
Frontier agents and coding — 30+ hours of focused accuracy.
Claude Sonnet 4.6, released in February 2026, is Anthropic's latest frontier model optimized for agents, coding, and computer use. Building on the strengths of Sonnet 4.5, it delivers improved reasoning, faster responses, and enhanced agentic capabilities. It achieves top-tier performance on SWE-bench Verified and supports a 200K token context window with up to 64K output tokens.
Performance Scores
Claude Sonnet 4.6 — Capability Radar
Strengths
Top-tier SWE-bench Verified performance
30+ hour sustained coding accuracy
Improved reasoning and faster responses over 4.5
200K context window with 64K output
Weaknesses
Premium pricing at $3/$15 per 1M tokens
Not as strong as Opus on deep philosophical reasoning
Speed slower than Haiku variants
Use Cases
Long-running agentic coding projects
Complex software development workflows
Computer use and UI automation
Large-scale code refactoring
Example Demo
Example Prompts
Large-scale refactoring
“Refactor this entire microservices codebase from REST to gRPC, maintaining backward compatibility.”
DevOps automation
“Build a complete CI/CD pipeline for this monorepo with automated testing and deployment.”
Computer use
“Navigate to this website, fill out the form, download the report, and summarize the key findings.”