Create a Message Batch

BatchCreateParams parameters = new()
{
    Requests =
    [
        new()
        {
            CustomID = "my-custom-id-1",
            Params = new()
            {
                MaxTokens = 1024,
                Messages =
                [
                    new()
                    {
                        Content = "Hello, world",
                        Role = Role.User,
                        ClearAt = ClearAt.NextUserMessage,
                        OutputConfig = new() { Effort = Effort.Low },
                    },
                ],
                Model = Model.ClaudeOpus5,
                CacheControl = new() { Ttl = Ttl.Ttl5m },
                Compaction = new() { Instructions = "instructions" },
                Container = new BetaContainerParams()
                {
                    ID = "id",
                    Skills =
                    [
                        new()
                        {
                            SkillID = "pdf",
                            Type = Type.Anthropic,
                            Version = "latest",
                        },
                    ],
                },
                ContextManagement = new()
                {
                    Edits =
                    [
                        new BetaClearToolUses20250919Edit()
                        {
                            ClearAtLeast = new(0),
                            ClearToolInputs = true,
                            ExcludeTools =
                            [
                                "string"
                            ],
                            Keep = new(0),
                            Trigger = new BetaInputTokensTrigger(1),
                        },
                    ],
                },
                Diagnostics = new()
                {
                    PreviousMessageID = "previous_message_id"
                },
                FallbackCreditToken = "x",
                Fallbacks = new Default(),
                InferenceGeo = "inference_geo",
                McpServers =
                [
                    new()
                    {
                        Name = "name",
                        Url = "url",
                        AuthorizationToken = "authorization_token",
                        ToolConfiguration = new()
                        {
                            AllowedTools =
                            [
                                "string"
                            ],
                            Enabled = true,
                        },
                    },
                ],
                Metadata = new()
                {
                    UserID = "13803d75-b4b5-4c3e-b2a2-6f21399b021b"
                },
                OutputConfig = new()
                {
                    Effort = Effort.Low,
                    Format = new()
                    {
                        Schema = new Dictionary<string, JsonElement>()
                        {
                            { "foo", JsonSerializer.SerializeToElement("bar") }
                        },
                    },
                    TaskBudget = new()
                    {
                        Total = 1024,
                        Remaining = 0,
                    },
                },
                OutputFormat = new()
                {
                    Schema = new Dictionary<string, JsonElement>()
                    {
                        { "foo", JsonSerializer.SerializeToElement("bar") }
                    },
                },
                ServiceTier = ServiceTier.Auto,
                Speed = Speed.Standard,
                StopSequences =
                [
                    "string"
                ],
                Stream = false,
                System = new(

                    [
                        new BetaTextBlockParam()
                        {
                            Text = "Today's date is 2024-06-01.",
                            CacheControl = new() { Ttl = Ttl.Ttl5m },
                            Citations =
                            [
                                new BetaCitationCharLocationParam()
                                {
                                    CitedText = "The grass is green. The sky is blue.",
                                    DocumentIndex = 0,
                                    DocumentTitle = "x",
                                    EndCharIndex = 0,
                                    StartCharIndex = 0,
                                },
                            ],
                        },
                    ]
                ),
                Temperature = 1,
                Thinking = new BetaThinkingConfigAdaptive()
                {
                    BlockBinding = new()
                    {
                        PrefixMismatchBehavior = BetaThinkingPrefixMismatchBehavior.Error,
                    },
                    Display = Display.Summarized,
                },
                ToolChoice = new BetaToolChoiceAuto()
                {
                    DisableParallelToolUse = true
                },
                Tools =
                [
                    new BetaTool()
                    {
                        InputSchema = new()
                        {
                            Properties = new Dictionary<string, JsonElement>()
                            {
                                { "location", JsonSerializer.SerializeToElement("bar") },
                                { "unit", JsonSerializer.SerializeToElement("bar") },
                            },
                            Required =
                            [
                                "location"
                            ],
                        },
                        Name = "name",
                        AllowedCallers =
                        [
                            AllowedCaller.Direct
                        ],
                        CacheControl = new() { Ttl = Ttl.Ttl5m },
                        DeferLoading = true,
                        Description = "Get the current weather in a given location",
                        EagerInputStreaming = true,
                        InputExamples =
                        [
                            new Dictionary<string, JsonElement>()
                            {
                                { "foo", JsonSerializer.SerializeToElement("bar") },
                            },
                        ],
                        Strict = true,
                        Type = Type.Custom,
                    },
                ],
                TopK = 5,
                TopP = 0.7,
            },
        },
    ],
};

var betaMessageBatch = await client.Beta.Messages.Batches.Create(parameters);

Console.WriteLine(betaMessageBatch);