Table of Contents

Class AnthropicService

Namespace
Mythosia.AI.Services.Anthropic
Assembly
Mythosia.AI.dll
public class AnthropicService : AIService, IAIService, IFunctionRegisterable
Inheritance
AnthropicService
Implements
Inherited Members
Extension Methods

Constructors

AnthropicService(string, HttpClient) 

public AnthropicService(string apiKey, HttpClient httpClient)

Parameters

apiKey string
httpClient HttpClient

AnthropicService(string, string, HttpClient)

Creates a AnthropicService with a specific model.

public AnthropicService(string apiKey, string model, HttpClient httpClient)

Parameters

apiKey string
model string
httpClient HttpClient

Properties

AdaptiveThinkingDisplay

Controls whether adaptive-thinking models return readable summarized reasoning. This value is sent only when adaptive thinking is explicitly enabled.

public ClaudeThinkingDisplay AdaptiveThinkingDisplay { get; set; }

Property Value

ClaudeThinkingDisplay

AdaptiveThinkingEffort

Selects the low/medium/high/xhigh/max effort range on adaptive-thinking Claude models. XHigh is rejected for Opus 4.6 and Sonnet 4.6 because those models do not support it. Auto preserves the legacy ThinkingBudget mapping using effort levels the selected model supports.

public ClaudeReasoningEffort AdaptiveThinkingEffort { get; set; }

Property Value

ClaudeReasoningEffort

LastThinkingContent

Contains the thinking/reasoning content from the last non-streaming API call. Populated when the response contains a thinking block. This can occur even when ThinkingBudget is disabled for models whose adaptive thinking is always on.

public string? LastThinkingContent { get; }

Property Value

string

Provider

The AI provider for this service

public override string Provider { get; }

Property Value

string

SupportsExtendedThinking

Returns true if the current model supports a Claude thinking mode. Despite this legacy property name, a true value can mean either manual extended thinking (thinking.type=enabled) or adaptive thinking (thinking.type=adaptive). Claude Fable 5, Mythos 5, Opus 5, Sonnet 5, and Opus 4.7+ are adaptive-only and do not accept budget_tokens.

public bool SupportsExtendedThinking { get; }

Property Value

bool

ThinkingBudget

Controls the thinking token budget for Claude extended thinking. -1 requests disabled thinking where the model permits it. Fable 5 and Mythos 5 cannot disable thinking, so this setting uses their lowest effort and omits the readable summary instead. 1024+ is an exact token budget on manual-thinking models. On adaptive-thinking models, it retains the legacy high/xhigh/max effort mapping unless AdaptiveThinkingEffort is set explicitly. Supported models: Claude Fable 5, Claude Mythos 5, Claude Sonnet 5 / 4+, Claude Opus 5 / 4+, and Claude Haiku 4.5+. Note: adaptive-thinking models omit temperature; legacy manual-thinking models force it to 1.

public int ThinkingBudget { get; set; }

Property Value

int

Methods

ApplyProviderSpecificRequestProfile(AIRequestProfile) 

protected override Action ApplyProviderSpecificRequestProfile(AIRequestProfile profile)

Parameters

profile AIRequestProfile

Returns

Action

ApplyRequestProfile(AIRequestProfile) 

protected override Action ApplyRequestProfile(AIRequestProfile profile)

Parameters

profile AIRequestProfile

Returns

Action

CreateFunctionMessageRequest()

Creates HTTP request with function definitions

protected override HttpRequestMessage CreateFunctionMessageRequest()

Returns

HttpRequestMessage

CreateMessageRequest()

Creates the HTTP request message for the AI service

protected override HttpRequestMessage CreateMessageRequest()

Returns

HttpRequestMessage

CreateMessageWithImageUrl(string, string)

Downloads an image from URL and converts to base64 for Claude

public Task<Message> CreateMessageWithImageUrl(string prompt, string imageUrl)

Parameters

prompt string
imageUrl string

Returns

Task<Message>

ExtractFunctionCalls(string)

Extracts every function call from one API response.

protected override (string content, FunctionCallBatch functionCalls) ExtractFunctionCalls(string response)

Parameters

response string

Returns

(string content, FunctionCallBatch functionCalls)

ExtractResponseContent(string)

Extracts the response content from the API response

protected override string ExtractResponseContent(string responseContent)

Parameters

responseContent string

Returns

string

GetCompletionAsync(Message) 

public override Task<string> GetCompletionAsync(Message message)

Parameters

message Message

Returns

Task<string>

GetCompletionWithImageAsync(string, string) 

public override Task<string> GetCompletionWithImageAsync(string prompt, string imagePath)

Parameters

prompt string
imagePath string

Returns

Task<string>

GetInputTokenCountAsync()

Gets the token count for the current conversation

public override Task<uint> GetInputTokenCountAsync()

Returns

Task<uint>

GetInputTokenCountAsync(string)

Gets the token count for a specific prompt

public override Task<uint> GetInputTokenCountAsync(string prompt)

Parameters

prompt string

Returns

Task<uint>

GetModelMaxOutputTokens()

Returns the maximum output tokens allowed for the current model. Override in each service to provide model-specific limits.

protected override uint GetModelMaxOutputTokens()

Returns

uint

StreamCompletionAsync(Message, Func<string, Task>) 

public override Task StreamCompletionAsync(Message message, Func<string, Task> messageReceivedAsync)

Parameters

message Message
messageReceivedAsync Func<string, Task>

Returns

Task

StreamParseJson(string)

Parses streaming JSON data

protected override string StreamParseJson(string jsonData)

Parameters

jsonData string

Returns

string

StreamRoundAsync(StreamOptions, bool, FunctionCallingPolicy, CancellationToken)

Executes a single streaming round: sends an HTTP request, reads the SSE stream, yields chunks, and handles function execution if detected. Yield a FunctionResult to signal the template to continue to the next round; otherwise the stream ends.

protected override IAsyncEnumerable<StreamingContent> StreamRoundAsync(StreamOptions options, bool useFunctions, FunctionCallingPolicy policy, CancellationToken cancellationToken)

Parameters

options StreamOptions
useFunctions bool
policy FunctionCallingPolicy
cancellationToken CancellationToken

Returns

IAsyncEnumerable<StreamingContent>

WithAdaptiveThinkingParameters(ClaudeReasoningEffort, ClaudeThinkingDisplay)

Enables adaptive thinking with an explicit Claude effort and display policy.

public AnthropicService WithAdaptiveThinkingParameters(ClaudeReasoningEffort effort, ClaudeThinkingDisplay display = ClaudeThinkingDisplay.Summarized)

Parameters

effort ClaudeReasoningEffort
display ClaudeThinkingDisplay

Returns

AnthropicService

WithClaudeParameters(int?)

Sets Claude-specific parameters

public AnthropicService WithClaudeParameters(int? topK = null)

Parameters

topK int?

Returns

AnthropicService

WithConstitutionalAI(bool)

Enables or disables Claude's constitutional AI features

public AnthropicService WithConstitutionalAI(bool enabled = true)

Parameters

enabled bool

Returns

AnthropicService

WithTemperaturePreset(TemperaturePreset)

Sets temperature for different use cases

public AnthropicService WithTemperaturePreset(TemperaturePreset preset)

Parameters

preset TemperaturePreset

Returns

AnthropicService

WithThinkingParameters(int)

Sets Claude thinking through the legacy token-budget API. On manual-thinking models, the budget must be at least 1024 and is sent as budget_tokens; max_tokens is adjusted when necessary and temperature is forced to 1. On adaptive-only models, the numeric budget is retained for compatibility and mapped to high/xhigh/max effort instead of being sent to Anthropic.

public AnthropicService WithThinkingParameters(int budgetTokens)

Parameters

budgetTokens int

Returns

AnthropicService
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