# Claude Opus 5.5 Model Released

> Anthropics releases Claude Opus 5.5 model with enhanced capabilities.
- Title: Claude Opus 5.5 Model Released · GitHub | Shortify
- Summary: Anthropics releases Claude Opus 5.5 model with enhanced capabilities. Anthropics released Claude Opus 5.5, a new model with improved reasoning and tool usage…
- Keywords: claude, opus, op5_5, anthropics, foundationmodels, swift, model, capabilities, reasoning, toolusage, technology, startups
- Source: GitHub — https://github.com/anthropics/ClaudeForFoundationModels/commit/5180901338a50bef050d5e9464583753ed3869a3
- Read time: 1 min
- Topics: claude, opus, op5_5, anthropics, foundationmodels, swift, model, capabilities, reasoning, toolusage, technology, startups
## New Claude Model
Anthropics released Claude Opus 5.5, a new model with improved reasoning and tool usage capabilities.

> feat: add claude-opus-5-5
## Model Identifier Update
The model identifier changed from `opus5` to `opus5_5` in the codebase.

> ClaudeLanguageModel ( name : . opus5_5, auth : auth)
## API Model ID Format
The API model ID `claude-opus-5-5` corresponds to the new model identifier.

> ClaudeModel ( id : " claude-opus-5-5 " )
## Model Capabilities
Opus 5.5 supports five reasoning levels: low, medium, high, xhigh, and max.

> effortLevels : [ . low . medium . high . xhigh . max ]
## Adaptive Thinking
Opus 5.5 includes adaptive thinking for improved reasoning and output quality.

> adaptiveThinking : true
## Structured Output
Opus 5.5 supports structured output for better data handling and integration.

> structuredOutput : true
## Image Input
Opus 5.5 can process image inputs for multimodal applications.

> imageInput : true
## Fallback Models
Opus 5.5 can use fallback models like Opus 4.8 when it declines requests.

> fallbacks : [. opus4_8]
## Policy Area Handling
Opus 5.5 rejects forced tool use in certain policy areas, requiring explicit tool choices.

> rejects forced tool use (`tool_choice` `any` / `tool`)
## Model Compatibility
Opus 5.5 works with Swift code and integrates with existing Claude model frameworks.

> ClaudeLanguageModel ( name : . opus5_5, auth : auth)
## Model Release
Anthropics released Opus 5.5 as part of their foundation models update.

> feat: add claude-opus-5-5
## Key takeaway

Anthropics released Claude Opus 5.5, a new model with improved reasoning and tool usage capabilities.