Anthropic
Anthropic Claude model for long-running agentic coding and knowledge work.
1M ctxUSD 4 / 1M input tok; USD 20 / 1M output tok
Introducing Claude Sonnet 4.6AnthropicReleased February 17, 2026
Claude Sonnet 4.6
The designated LTS upgrade target for all Claude 3 and early Claude 4 applications, offering 500k context.
reasoning-llmProprietary API$3.00 / 1M tok (Sonnet 4.6)Context: 500K (500,000 tokens)Arena ELO: 1450
Technical Specifications
Architecture Type
High-Efficiency 500k Transformer
Total Parameters
Frontier Scale
Context Window
500K (500,000 tokens)
Max Output Tokens
64K (64,000 tokens)
Knowledge Cutoff
December 2025
Supported Modalities
text, code, vision, reasoning
License & Access
Anthropic Commercial Terms
Benchmark Evaluations
Mmlu Pro
85.5
Gpqa Diamond
78.4
Swe Bench Verified
78.1
Chatbot Arena ELO
1450
Deep Architectural Overview
Claude Sonnet 4.6 acts as the core migration destination for Claude 3.5 Sonnet, 3.7 Sonnet, and Sonnet 4 workloads. It delivers fast inference, extended 500k context, and solid agent tool support.
Strengths & Considerations
Core Strengths
- Designated migration target for Claude 3.5/3.7 deployments
- 500,000 token context window
- Active enterprise lifecycle support through February 2027
Known Limitations
- Manual extended thinking deprecated in favor of adaptive thinking on Sonnet 5
Token & API Pricing
Input Tokens (1M)$3.00
Output Tokens (1M)$15.00
Cached Input (1M)$0.3000
Batch API Discount50% Off Standard
Pricing is verified directly against Anthropic's developer documentation and API rate sheets.
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