Claude Sonnet 4.6 is Anthropic's latest mid-tier release aimed squarely at teams building coding assistants and agentic workflows that juggle shell commands, repository navigation, and multi-step tool use. Positioned as the best general-purpose option in Anthropic's line-up when price-performance is the deciding factor, it advances on Sonnet 4.5 across the engineering benchmarks that most closely mirror day-to-day software work, including real GitHub issue resolution and terminal-based agent tasks. The model retains the same per-token pricing as its predecessor, so upgrading does not change unit economics.

The strongest signal of fit comes from the benchmark gains: 79.6% on SWE-bench Verified, a curated set of real GitHub issues scored by whether the proposed patch passes the repository's own tests; 59.1% on Terminal-Bench 2.0, which evaluates CLI-style agent behavior under realistic shell and tooling constraints; and 72.5% on OSWorld-Verified, which stresses computer-use tasks. Together these jumps over Sonnet 4.5 describe a model that handles messy repos, brittle test suites, and ambiguous tickets more reliably, while keeping the headline cost profile unchanged for production deployments.