Sonnet 4.5
The "Gold Standard" for autonomous coding and complex agentic workflows.
About the Model
Released in late 2025, Claude Sonnet 4.5 is widely considered the most balanced model in the world for professional engineering. It was built specifically to handle "long-horizon" tasks, meaning it can work autonomously for 30+ hours on a single coding objective without losing coherence. It is the first model to achieve a 61.4% score on the OSWorld benchmark for real-world computer use.
Model Key Capabilities
Computer Use (Native):
Can see screens, move cursors, and type in standard desktop applications like a human.
Massive Reasoning Gains:
Significant improvements in graduate-level math and specialized science (GPQA).
30-Hour Autonomy:
Capable of managing multi-day engineering sprints with self-correction and testing.
Context Editing:
A new API feature that allows the model to "rewrite" parts of its own long-term memory to stay efficient.
Applications & Use Cases
Autonomous Software Engineering:
Building, testing, and deploying full-stack features from a single prompt.
Complex Multi-App Workflows:
Researching data in a browser and then populating a local Excel sheet and PowerPoint.
Legal & Financial Forensics:
Analyzing massive document sets for subtle logical contradictions.
Recomended Models based on your needs
Model Specifications
General | |
|---|---|
Model Provider | Anthropic |
Main Use Cases |
|
Intelligence | |
Reasoning Effort | Adaptive (Standard/High) |
GPQA Diamond | 83.4% |
Memory | |
Max Context | 1.0M Tokens |
Speed | |
Latency (TTFT) | 0.42s |
Throughput | 38 Tokens/Sec |
