Claude Sonnet 4.6
anthropic.com
February 17, 2026
10 min read
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78/100
Summary
Claude Sonnet 4.6 is the most advanced Sonnet model, featuring upgrades in coding, computer use, long-context reasoning, agent planning, knowledge work, and design. It includes a beta 1M token context window and is now the default model for Free and Pro plan users on claude.ai and Claude Cowork, with pricing unchanged from Sonnet 4.5 at $3/$15 per million tokens.
Key Takeaways
- Claude Sonnet 4.6 is the most capable model in the Sonnet series, featuring a full upgrade in skills across various domains including coding, long-context reasoning, and design.
- The model includes a 1M token context window in beta and is now the default model for users on the Free and Pro plans at the same pricing as Sonnet 4.5.
- Sonnet 4.6 shows significant improvements in coding skills and computer use capabilities, enabling tasks that previously required higher-tier models.
- Safety evaluations indicate that Sonnet 4.6 is as safe as or safer than previous models, with enhanced resistance to prompt injection attacks.
Community Sentiment
Positives
- Sonnet 4.6 is reportedly as capable as Opus 4.5 according to Anthropic's benchmarks, indicating that advancements in AI capabilities continue at a rapid pace.
- The competition in the AI space is driving improvements, which ultimately benefits consumers by enhancing the quality of AI tools available.
Concerns
- Many users have noted that Sonnet 4.6 consumes 5-10 times more tokens than 4.5 for the same tasks, raising concerns about efficiency and usability.
- Safety evaluations reveal that the model can still be vulnerable to adversarial attacks, with a concerning 8% success rate for injection takeovers, which undermines trust in its deployment.
