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Claude Opus 5.5 Model Released
Anthropics releases Claude Opus 5.5 model with enhanced capabilities.
In brief
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 capabilities. Originally reported by GitHub.
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”
What it means
Anthropics released Claude Opus 5.5, a new model with improved reasoning and tool usage capabilities.
