581 pages for models.

pdf-support Claude Developer Platform · in the page build-with-claude/pdf-support …: stable zdr: eligibility: eligible note: Excludes [Covered Models](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#model-specific-data-retention-requirements). su… preserved-thinking Claude Developer Platform · in the page build-with-claude/preserved-thinking …m/docs/en/build-with-claude/preserved-thinking description: On Claude models that run the prefix check, preserved thinking determines whether the model can use a thinking block you send back from an e… change-tools-or-instructions Claude Developer Platform · in the page build-with-claude/preserved-thinking/change-tools-or-instructions …ps its earlier thinking. featureMetadata: status: stable supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-opus-5-5 -… fix-bound-to-a-different-conversation Claude Developer Platform · in the page build-with-claude/preserved-thinking/fix-bound-to-a-different-conversation …that the change is gone. featureMetadata: status: stable supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-opus-5-5 -… prefix-checks Claude Developer Platform · in the page build-with-claude/preserved-thinking/prefix-checks …king/prefix-checks description: What the prefix check compares, which models run it, what happens when a request fails it, and how to handle the 400 error and the case with no error. featureMetadata:… Request 2 caches its request content (not the response) Claude Developer Platform · in the page build-with-claude/prompt-caching …etadata: zdr: eligibility: eligible note: Excludes [Covered Models](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#model-specific-data-retention-requirements). Your… claude-prompting-best-practices Claude Developer Platform · in the page build-with-claude/prompt-engineering/claude-prompting-best-practices …prehensive guide to prompt engineering techniques for Claude's latest models, covering clarity, examples, XML structuring, thinking, and agentic systems. --- This is the reference for prompt engineer… overview Claude Developer Platform · in the page build-with-claude/prompt-engineering/overview …ractices"> For model-specific tuning guidance for Claude’s latest models, start here. </Card> </CardGroup> *** ## When to prompt engineer This guide focuses on success criteria that are contr… prompting-claude-fable-5 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-fable-5 …vailability, see [Claude Fable 5](https://platform.claude.com/docs/en/models/fable-5/overview). For techniques that apply across all current Claude models, see [Prompting best practices](https://platf… Delivering work Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-fable-5-1 …ilability, see [Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/overview). For techniques that apply across Claude models, see [Prompting best practices](https://platform.claude… Finishing work Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-fable-5-2 …s, caution that builds up, prompts and harnesses designed for earlier models, final reports, and refusals." --- This guide covers the prompting patterns specific to Claude Fable 5.2. For the model’s… prompting-claude-haiku-5-5 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-haiku-5-5 …[What’s new in Claude Haiku 5.5](https://platform.claude.com/docs/en/models/haiku-5-5/whats-new-haiku-5-5). For techniques that apply across all current Claude models, see [Prompting best practices](… prompting-claude-opus-4-8 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-opus-4-8 …de Opus 5.5 from Claude Opus 4.8](https://platform.claude.com/docs/en/models/opus-5-5/migration-guide#migrating-from-claude-opus-4-8). For techniques that apply across all current Claude models, see [… prompting-claude-opus-5 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-opus-5 …ecifications, see [Claude Opus 5](https://platform.claude.com/docs/en/models/opus-5/overview). For techniques that apply across all current Claude models, see [Prompting best practices](https://platfo… prompting-claude-opus-5-5 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-opus-5-5 …e [What’s new in Claude Opus 5.5](https://platform.claude.com/docs/en/models/opus-5-5/whats-new-opus-5-5). For techniques that apply across all current Claude models, see [Prompting best practices](ht… prompting-claude-sonnet-5 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-sonnet-5 …ifications, see [Claude Sonnet 5](https://platform.claude.com/docs/en/models/sonnet-5/overview). For techniques that apply across all current Claude models, see [Prompting best practices](https://plat… prompting-claude-sonnet-5-5 Claude Developer Platform · in the page build-with-claude/prompt-engineering/prompting-claude-sonnet-5-5 …[What’s new in Claude Sonnet 5.5](https://platform.claude.com/docs/en/models/sonnet-5-5/whats-new-sonnet-5-5). For techniques that apply across all current Claude models, see [Prompting best practices… refusals-and-fallback Claude Developer Platform · in the page build-with-claude/refusals-and-fallback …build-with-claude/refusals-and-fallback description: How Claude Fable models, Claude Opus models, Claude Sonnet 5.5, and Claude Haiku 5.5 return classifier refusals and how to retry refused requests o… search-results Claude Developer Platform · in the page build-with-claude/search-results …: stable zdr: eligibility: eligible note: Excludes [Covered Models](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#model-specific-data-retention-requirements). su… skills-guide Claude Developer Platform · in the page build-with-claude/skills-guide …fmt.Println(response) ``` ```java Java import com.anthropic.models.messages.ContainerParams; import com.anthropic.models.messages.SkillParams; import com.anthropic.models.messages.CodeEx… streaming Claude Developer Platform · in the page build-with-claude/streaming …se, and thinking deltas. featureMetadata: status: stable supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - c… structured-outputs Claude Developer Platform · in the page build-with-claude/structured-outputs …stable zdr: eligibility: qualified note: "Excludes [Covered Models](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#model-specific-data-retention-requirements). Your… task-budgets Claude Developer Platform · in the page build-with-claude/task-budgets …data: status: beta betaHeader: task-budgets-2026-03-13 supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - c… text-watermark Claude Developer Platform · in the page build-with-claude/text-watermark …: What Anthropic's text watermark leaves unchanged, where to find the models and platforms it covers, and which sampling parameters to omit if you rely on it. --- Text generated by supported Claude m… thinking Claude Developer Platform · in the page build-with-claude/thinking …: stable zdr: eligibility: eligible note: Excludes [Covered Models](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#model-specific-data-retention-requirements). su… thinking-steering-and-cost Claude Developer Platform · in the page build-with-claude/thinking-steering-and-cost …`high`, suited to extended exploration. | | `high` (default on most models) | Claude thinks on most requests that benefit from it. Provides deep reasoning on complex tasks… thinking-tool-workflows Claude Developer Platform · in the page build-with-claude/thinking-tool-workflows …Claude Mythos 5.1:** Forced tool use returns a 400 error. * **Other models:** Forced tool use is accepted, and it skips thinking. The response starts with the tool call. * [Keep one thinking config… thinking-troubleshooting Claude Developer Platform · in the page build-with-claude/thinking-troubleshooting …nking.type` value in the request and what the model supports. On most models, thinking runs as `thinking: {type: "adaptive"}`, and many have it on by default. Some earlier models instead use [extended… token-counting Claude Developer Platform · in the page build-with-claude/token-counting …: stable zdr: eligibility: eligible note: Excludes [Covered Models](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#model-specific-data-retention-requirements). Coun… vision Claude Developer Platform · in the page build-with-claude/vision …multimodal interaction. featureMetadata: status: stable supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - c… vision-coordinates Claude Developer Platform · in the page build-with-claude/vision-coordinates …e.com/docs/en/build-with-claude/vision#evaluate-image-size) for which models are in which tier. For nearly all photos and screenshots, the visual token limit is what determines the final size. The ed… working-with-messages Claude Developer Platform · in the page build-with-claude/working-with-messages …: stable zdr: eligibility: eligible note: Excludes [Covered Models](https://platform.claude.com/docs/en/manage-claude/api-and-data-retention#model-specific-data-retention-requirements). Stan… API usage primer for Claude Claude Developer Platform · in the page claude_api_primer …ic messages API, tool use, streaming, thinking, and nothing else. ## Models ```text wrap Recommended default for most work, including complex agentic coding: Claude Opus 5.5: claude-opus-5-5 Step up… On a remote host without a browser: Claude Developer Platform · in the page cli-sdks-libraries/cli/authentication …a single command without changing the default: ant --profile other-ws models list ANTHROPIC_PROFILE=other-ws ant models list ``` Run [`ant auth status`](https://platform.claude.com/docs/en/cli-sdks-l… using Claude Developer Platform · in the page cli-sdks-libraries/cli/using …t (for example, to opt into a different schema version). ```bash ant models list ant messages create --model claude-opus-5-5 --max-tokens 1024 ... ant beta:agents retrieve --agent-id agent_01... ant… openai-sdk Claude Developer Platform · in the page cli-sdks-libraries/libraries/openai-sdk …opic model capabilities. featureMetadata: status: stable supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - c… middleware Claude Developer Platform · in the page cli-sdks-libraries/middleware …modify the SDK's requests and responses. featureMetadata: supportedModels: - claude-fable-5-2 - claude-mythos-5-2 - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - c… overview Claude Developer Platform · in the page cli-sdks-libraries/overview …cli-sdks-libraries/sdks/python"> Sync and async clients, Pydantic models </Card> <Card title="TypeScript" href="https://platform.claude.com/docs/en/cli-sdks-libraries/sdks/typescript"> No… csharp Claude Developer Platform · in the page cli-sdks-libraries/sdks/csharp …. ## Usage ```csharp using System; using Anthropic; using Anthropic.Models.Messages; AnthropicClient client = new(); MessageCreateParams parameters = new() { MaxTokens = 1024, Messages = [… go Claude Developer Platform · in the page cli-sdks-libraries/sdks/go …ude.com/docs/en/build-with-claude/claude-platform-on-aws) * [Claude Models on Google Cloud (Google managed)](https://platform.claude.com/docs/en/build-with-claude/claude-models-on-google-cloud/googl… java Claude Developer Platform · in the page cli-sdks-libraries/sdks/java …m.anthropic.client.okhttp.AnthropicOkHttpClient; import com.anthropic.models.messages.Message; import com.anthropic.models.messages.MessageCreateParams; import com.anthropic.models.messages.Model; //… php Claude Developer Platform · in the page cli-sdks-libraries/sdks/php …ude.com/docs/en/build-with-claude/claude-platform-on-aws) * [Claude Models on Google Cloud (Google managed)](https://platform.claude.com/docs/en/build-with-claude/claude-models-on-google-cloud/googl… For Amazon Bedrock support Claude Developer Platform · in the page cli-sdks-libraries/sdks/python …and integrations with Amazon Bedrock, Claude Platform on AWS, Claude Models on Google Cloud (Anthropic managed), Claude Models on Google Cloud (Google managed), and Microsoft Foundry. <Info> For A… Automatically handles tool execution loop Claude Developer Platform · in the page cli-sdks-libraries/sdks/ruby …ude.com/docs/en/build-with-claude/claude-platform-on-aws) * [Claude Models on Google Cloud (Google managed)](https://platform.claude.com/docs/en/build-with-claude/claude-models-on-google-cloud/googl… typescript Claude Developer Platform · in the page cli-sdks-libraries/sdks/typescript …ude.com/docs/en/build-with-claude/claude-platform-on-aws) * [Claude Models on Google Cloud (Google managed)](https://platform.claude.com/docs/en/build-with-claude/claude-models-on-google-cloud/googl… get-started Claude Developer Platform · in the page get-started …```csharp C# using Anthropic; using Anthropic.Models.Messages; var client = new AnthropicClient(); var message = await client.Messages.Create(new MessageCreat… home Claude Developer Platform · in the page home …d" href="https://platform.claude.com/docs/en/build-with-claude/claude-models-on-google-cloud/overview"> Google Cloud </HomeCloudPartnerLink> <HomeCloudPartnerLink icon="cloud" hre… intro Claude Developer Platform · in the page intro …managed-agents/overview). ## Explore the latest generation of Claude models If you’re unsure which model to use, start with [Claude Opus 5.5](https://platform.claude.com/docs/en/models/opus-5-5/over… access-transparency Claude Developer Platform · in the page manage-claude/access-transparency …e, Pro, Max, or Ultra plans. * **Partner-operated platforms:** Claude Models on Google Cloud (Google managed) and Amazon Bedrock. Refer to those platforms’ transparency controls. * **Anything ZDR does… admin-api Claude Developer Platform · in the page manage-claude/admin-api …{ log.Fatal(err) } ``` ```java Java import com.anthropic.models.organization.users.UserListParams; void main() { AnthropicClient client = AnthropicOkHttpClient.fromEnv();…