Krux
February 19, 2026
Claude Sonnet 4.6 Drops with 1M Token Superpowers
Published: February 19, 2026 at 1:03 AM
Updated: February 19, 2026 at 1:03 AM
100-word summary
Anthropic just launched Claude Sonnet 4.6, a major upgrade boosting coding, reasoning, and agent planning. The standout? A massive 1M token context window that can swallow entire codebases, lengthy contracts, or dozens of research papers in one go. Pricing stays unchanged at $3/$15 per million tokens, and it's now the default model for Free and Pro users. The API adds automated web search tools and Excel gets MCP connector support for external data sources like S&P Global and PitchBook. This could reshape how developers handle complex projects and how analysts crunch data, making AI assistance far more comprehensive without extra cost.
What happened
Anthropic just launched Claude Sonnet 4.6, a major upgrade boosting coding, reasoning, and agent planning. The standout? A massive 1M token context window that can swallow entire codebases, lengthy contracts, or dozens of research papers in one go. Pricing stays unchanged at $3/$15 per million tokens, and it's now the default model for Free and Pro users. The API adds automated web search tools and Excel gets MCP connector support for external data sources like S&P Global and PitchBook.
Why it matters
This could reshape how developers handle complex projects and how analysts crunch data, making AI assistance far more comprehensive without extra cost.