Claude Sonnet 4.6 Just got released!

Quick Overview

Anthropic released Claude Sonnet 4.6 on February 17, 2026, which significantly improves performance across coding, computer use, long-context reasoning, agent planning, knowledge work, and design, achieving scores nearly equal to Opus 4.6 in several agentic benchmarks while maintaining the same pricing as Sonnet 4.5 ($3/$15 per million tokens) and introducing a 1M token context window in beta.

Key Points: Claude Sonnet 4.6 is positioned as the most capable Sonnet model yet, offering a full upgrade across skills including coding, computer use, reasoning, and design. Sonnet 4.6 matches or nearly matches the performance of the previous frontier model, Opus 4.5, in agentic financial analysis (63.3% vs 60.1%) and closely rivals Opus 4.6 in several agentic tasks. The new model features a 1M token context window in beta, and developers using Claude Code showed a strong preference (70% of the time) for Sonnet 4.6 over Sonnet 4.5. Pricing remains the same as Sonnet 4.5, starting at $3/$15 per million tokens for input/output, which is cheaper than Opus 4.6. On the Vending-Bench Arena, Sonnet 4.6 significantly outperforms Sonnet 4.5, achieving balances over $5,000 compared to under $2,000 after 300 days of simulation. Sonnet 4.6 scores 72.5% on OSWorld-Verified computer use benchmarks, showing continuous improvement over previous Sonnet versions (Sonnet 4.5 scored 61.4%). The free tier is upgraded to Sonnet 4.6 by default, now including file creation, connectors, skills, and context compaction.

Context: The video announces the release of Claude Sonnet 4.6 by Anthropic on February 17, 2026, positioning it as a major upgrade to their mid-tier model. The presentation uses benchmark comparison tables (Agentic coding, tool use, reasoning) and simulation graphs (Vending-Bench Arena) to demonstrate Sonnet 4.6's performance gains over its predecessor, Sonnet 4.5, and its closer parity with the larger Opus model, while also highlighting new features like a larger context window and improved tool use capabilities.