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What is Claude Sonnet 4.6?
Claude Sonnet 4.6 is a mid-tier AI model from Anthropic, released in February 2026. It sits between the lightweight Haiku and the flagship Opus in Anthropic's model lineup. Despite being positioned as the balanced option, Sonnet 4.6 approaches Opus-level performance on many benchmarks while running faster and costing significantly less. Overchat AI makes this model available to everyone through our all-in-one AI platform.
Anthropic, the company behind Claude, was founded in 2021 by former OpenAI researchers Dario and Daniela Amodei. The company has built a reputation for prioritizing AI safety while pushing the boundaries of model capability.
What makes Sonnet 4.6 stand out is its price-to-performance ratio. At $3 per million input tokens and $15 per million output tokens, it delivers results that rival models costing five times more. Its competitors in the mid-tier space include GPT-4o and Gemini 3 Flash.
Claude Sonnet 4.6 Key Upgrades
Sonnet 4.6 doubles its context window to 1 million tokens, matching Opus for the first time. This means it can process entire codebases, long legal documents, or multi-chapter books in a single conversation without losing track of earlier details.
The biggest leap is in computer use. Sonnet 4.6 can navigate desktop applications, fill out forms, and interact with software interfaces autonomously. It also introduces adaptive thinking that engages extended reasoning only when the task demands it, keeping simple answers fast.
Like all Claude models, Sonnet 4.6 is proprietary and available through Anthropic's API and partner platforms. You cannot run it locally or self-host it. One of the simplest ways to try Sonnet 4.6 is through Overchat AI, where no separate Anthropic account or API key is needed.
Sonnet sits in the middle of the Claude family. Opus 4.6 remains the most powerful for tasks requiring deep reasoning, while Haiku 4.5 is the fastest option for quick, lightweight interactions. All three models are available on Overchat AI.
Anthropic's emphasis on safety carries over to Sonnet 4.6. The model is designed to be transparent about the limits of its knowledge, reducing hallucinations and fabricated answers. For students, professionals, and anyone who needs reliable information, this honesty makes Sonnet a trustworthy daily assistant.
