Claude Sonnet 4.6
ClaudeFlagship
ThinkingTool UseVisionStructured Output
About this model
Sonnet 4.6 is Anthropic's most capable Sonnet-class model yet, with frontier performance across coding, agents, and professional work. It excels at iterative development, complex codebase navigation, end-to-end project management with...
Performance Tier
Flagship
Claude Sonnet 4.6 is a flagship model from Claude : the most capable in their lineup.
Best-in-class model from this provider. Highest performance across benchmarks, ideal for demanding tasks.
Pricing
This model is included in Elosia plansHigh
High pricing. Reserve this level for tasks that demand maximum quality.
| Type | per 1M tokens |
|---|---|
| Input (prompt) | $3.00 |
| Output (completion) | $15.00 |
| Cache read | $0.300 |
| Cache write | $3.75 |
Capabilities
Context Length1.0M
Max Output Tokens128K
TokenizerClaude
Inputtext, image, file
Outputtext
Release DateFebruary 17, 2026
Benchmarks
General Intelligence
MMLU
Not reported
GPQA Diamond
89.9%
Mathematics
MATH-500
Not reported
Programming
HumanEval
Not reported
SWE-bench Verified
79.6%
Reasoning
IFEval
Not reported
ARC-AGI-2
58.3%
Humanity's Last Exam
49%
Agentic
Terminal-Bench 2.0
59.1%
Recommended Use Cases
CodingAnalysisResearchCreative Writing
Strengths
- Near-Opus performance at a fraction of the cost
- Exceptional agentic coding (SWE-bench 79.6%, close to Opus 80.8%)
- Strong graduate-level reasoning (GPQA Diamond 89.9%)
- 1M token context window for long-document tasks
Limitations
- Anthropic's published evaluation focuses on agentic and reasoning benchmarks — MMLU and HumanEval are not part of the official suite
- Slower than Haiku for simple, latency-sensitive queries
Resources
This model may use your data for training
