AnthropicModelCapabilities

Namespace: Vercel.AI.Anthropic

public sealed class AnthropicModelCapabilities

What a Claude model id accepts on the Messages API.

Inheritance: object

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Constructors

AnthropicModelCapabilities(int, bool, bool, bool, bool, bool, bool, bool, bool, bool, bool)

public AnthropicModelCapabilities(int maxOutputTokens, bool supportsStructuredOutput, bool supportsAdaptiveThinking, bool rejectsSamplingParameters, bool supportsXhighEffort, bool rejectsThinkingDisabledAboveHighEffort, bool rejectsThinkingDisabled, bool rejectsBudgetThinking, bool rejectsForcedToolUse, bool isKnownModel, bool supportsBetweenToolsThinking = false)

Creates a capability set.

Parameters

Name	Type	Description
maxOutputTokens	int
supportsStructuredOutput	bool
supportsAdaptiveThinking	bool
rejectsSamplingParameters	bool
supportsXhighEffort	bool
rejectsThinkingDisabledAboveHighEffort	bool
rejectsThinkingDisabled	bool
rejectsBudgetThinking	bool
rejectsForcedToolUse	bool
isKnownModel	bool
supportsBetweenToolsThinking	bool

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Properties

IsKnownModel

public bool IsKnownModel { get; }

The id is a recognized Claude model rather than a forward-compatible guess.

Value: bool

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MaxOutputTokens

public int MaxOutputTokens { get; }

Model output token ceiling.

Value: int

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RejectsBudgetThinking

public bool RejectsBudgetThinking { get; }

Budget-based thinking is rejected and sent as adaptive thinking.

Value: bool

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RejectsForcedToolUse

public bool RejectsForcedToolUse { get; }

Forced tool choice is rejected.

Value: bool

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RejectsSamplingParameters

public bool RejectsSamplingParameters { get; }

Temperature, top-p, and top-k are rejected.

Value: bool

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RejectsThinkingDisabled

public bool RejectsThinkingDisabled { get; }

The model always thinks and rejects disabled thinking.

Value: bool

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RejectsThinkingDisabledAboveHighEffort

public bool RejectsThinkingDisabledAboveHighEffort { get; }

Thinking cannot be disabled at effort above high.

Value: bool

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SupportsAdaptiveThinking

public bool SupportsAdaptiveThinking { get; }

Thinking is adaptive rather than budget-based.

Value: bool

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SupportsBetweenToolsThinking

public bool SupportsBetweenToolsThinking { get; }

Thinking type between_tools is accepted. It is the lowest thinking setting on models that reject disabled thinking.

Value: bool

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SupportsStructuredOutput

public bool SupportsStructuredOutput { get; }

Native output_config.format is available.

Value: bool

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SupportsXhighEffort

public bool SupportsXhighEffort { get; }

Effort xhigh is accepted.

Value: bool

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Methods

Get(string)

public static AnthropicModelCapabilities Get(string modelId)

Resolves capabilities from a model id, including Bedrock-style prefixes.

Parameters

Name	Type	Description
modelId	string

Returns: AnthropicModelCapabilities

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