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Claude Sonnet 4.6

AnthropicProprietaryPending Human Review

Claude Sonnet 4.6 is the independently released Sonnet update for coding, computer use, long-context reasoning, and professional work. It improved follow-through, instruction following, and visual design and launched with a million-token context in beta. The current API documentation lists that context as standard. It offers adaptive thinking and tools through the Claude API and cloud partners, with text and image inputs and text output.

2026-02-17
Unreleased
Undisclosed proprietary architecture
Proprietary

Specifications

Parameters
Unreleased
Architecture
Undisclosed proprietary architecture
License
Proprietary
Context Window
1,000,000 tokens
Max Output
128,000 tokens
Training Data Cutoff
2026-01
Type
multimodal
Modalities
textimage

Benchmark Scores

Advanced Specifications

Model Family
Claude
API Access
Available
Chat Interface
Available
Multilingual Support
Yes
Variants
claude-sonnet-4-6

Capabilities & Limitations

Capabilities
agentic codingadaptive thinkingcomputer usevisionlong context
Known Limitations
Can make factual or coding errors; tool results and important outputs require verification.Longer reasoning and agent work increase latency and token consumption.
Notable Use Cases
software engineeringbrowser workflowsenterprise document analysis
Function Calling Support
Yes
Tool Use Support
Yes

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