anthropic/claude-opus-5.5

Anthropic's Opus model for long-running agentic coding and knowledge work, at a lower price than Opus 5

Capabilities

Reference ImagesSystem PromptMax Tokens

Cost

Community model (estimated from hardware time)

Input Parameters

Name	Type	Description	Default	Constraints
`prompt`*	string	Input prompt	`—`	—
`effort`	string	How much thinking Claude does before responding. Opus 5.5 always uses adaptive thinking; higher effort improves quality on hard coding and agentic tasks, but is slower and uses more output tokens. 'low' is the fastest and cheapest.	`"low"`	lowmediumhighxhighmax
`image`	string(uri)	Optional input image. Images are priced as (width px * height px)/750 input tokens	`—`	—
`max_image_resolution`	number	Maximum image resolution in megapixels. Scales down image before sending it to Claude, to save time and money.	`0.5`	min: 0.001, max: 2
`max_tokens`	integer	Maximum number of output tokens, including thinking tokens. Opus 5.5 always thinks before responding, so leave headroom at higher effort levels (Anthropic recommends starting at 64000 for 'xhigh' and 'max').	`8192`	min: 1024, max: 128000
`system_prompt`	string	System prompt	`""`	—

promptrequiredstring

Input prompt

effortstring

How much thinking Claude does before responding. Opus 5.5 always uses adaptive thinking; higher effort improves quality on hard coding and agentic tasks, but is slower and uses more output tokens. 'low' is the fastest and cheapest.

Default: "low"

lowmediumhighxhighmax

imagestring

Optional input image. Images are priced as (width px * height px)/750 input tokens

max_image_resolutionnumber

Maximum image resolution in megapixels. Scales down image before sending it to Claude, to save time and money.

Default: 0.5min: 0.001, max: 2

max_tokensinteger

Maximum number of output tokens, including thinking tokens. Opus 5.5 always thinks before responding, so leave headroom at higher effort levels (Anthropic recommends starting at 64000 for 'xhigh' and 'max').

Default: 8192min: 1024, max: 128000

system_promptstring

System prompt

Default: ""

Version: b44d8c9916e2Updated: 11/7/202667 runs