Anthropic

Claude Sonnet 5.5

Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fixing bugs, and producing...

claude-sonnet-5.5

Pricing

~92%

Input: $0.157419 / 1,000,000 tokens
Output: $0.787095 / 1,000,000 tokens
Cache read: $0.007871 / 1,000,000 tokens
Cache write: $0.196774 / 1,000,000 tokens

How pricing works

Discount history

92.1%Nov 8, 03:56 AM UTC

Nov 7, 11:57 PMNov 8, 03:56 AM UTC

Model details

Input: text, image, file
Output: text
Context window: 1,000,000 tokens
Maximum output: 128,000 tokens
Availability: $1.2KUncapped capacity
Updated: 11/8/2026, 3:58:06 AM UTC

Capacity is reserved when your request is accepted.

Capabilities

ChatStreamingWeb searchVisionTool callingReasoningJSON mode

Supported parameters

include_reasoningmax_completion_tokensmax_tokensreasoningreasoning_effortresponse_formatstopstructured_outputstemperaturetool_choicetoolsverbosity