Claude Sonnet 4.5
Anthropic's mid-sized model for powering real-world agents, with capabilities in coding, computer use, cybersecurity, and working with office files like spreadsheets.
Anthropic's mid-sized model for powering real-world agents, with capabilities in coding, computer use, cybersecurity, and working with office files like spreadsheets.
Reasoning
Higher
Speed
Medium
Price
$2.00 • $10.00
Input • Output
Input
Text, Image
Output
Text
Claude Sonnet 4.5 is the best coding model in the world. It’s the strongest model for building complex agents. It’s the best model at using computers. And it shows substantial gains in reasoning and math.
1000000 context window
64000 max output tokens
January 2025 knowledge cutoff
Reasoning token support
Modalities
Text
Input and output
Image
Input only
Audio
Not supported
Video
Not supported
Endpoints
Chat Completions
v1/chat/completions
Responses
v1/responses
Realtime
v1/realtime
Assistants
v1/assistants
Batch
v1/batch
Fine-tuning
v1/fine-tuning
Embeddings
v1/embeddings
Image generation
v1/images/generations
Videos
v1/videos
Image edit
v1/images/edits
Speech generation
v1/audio/speech
Transcription
v1/audio/transcriptions
Translation
v1/audio/translations
Moderation
v1/moderations
Completions (legacy)
v1/completions
Features
Streaming
Supported
Function calling
Supported
Structured outputs
Supported
Fine-tuning
Not supported
Distillation
Not supported
Tools
Tools supported by this model when using the Responses API.
Web search
Not supported
File search
Not supported
Image generation
Not supported
Code interpreter
Not supported
Computer use
Not supported
MCP
Not supported