Anthropic: Claude Sonnet 4.5
Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows. It delivers state-of-the-art performance on coding benchmarks such as SWE-bench Verified, with improvements across system design, code security, and specification adherence. The model is designed for extended autonomous operation, maintaining task continuity across sessions and providing fact-based progress tracking. Sonnet 4.5 also introduces stronger agentic capabilities, including improved tool orchestration, speculative parallel execution, and more efficient context and memory management. With enhanced context tracking and awareness of token usage across tool calls, it is particularly well-suited for multi-context and long-running workflows. Use cases span software engineering, cybersecurity, financial analysis, research agents, and other domains requiring sustained reasoning and tool use.
Model Information
Pricing Information
Supported Parameters
Common Use Cases
Multimodal Tasks
- • Image analysis and description
- • Visual question answering
- • Document understanding
- • Content moderation
Image Generation
- • Creative artwork generation
- • Product visualization
- • Marketing materials
- • Concept art and design
General Applications
- • Chatbots and virtual assistants
- • Educational content creation
- • Research and analysis
- • Automation and workflow
Frequently Asked Questions
What is the context length of this model?
This model has a context length of 1.0M tokens, which means it can process and remember up to 1.0M tokens of text in a single conversation or request.
How much does it cost to use this model?
Prompt tokens cost $3.00M/1M tokens and completion tokens cost $15.00M/1M tokens.
What modalities does this model support?
This model supports text+image->text modality, accepting text and image and fileas input and producing text as output.
When was this model created?
This model was created on September 29, 2025.