anthropic-models-sdks

anthropic-models-sdks

Claude API (platform.claude.com) — a reference covering model specs, selection criteria, versioning, pricing, deprecation schedules, the official SDKs in 7 languages, the CLI for the Claude API (ant), and library integrations.

For the Messages API itself, streaming, thinking, prompt caching, and structured outputs, see anthropic-api-core、 Tool use・Agent Skills・MCP connector は anthropic-api-tools-mcp; for Claude Code itself (CLI/IDE), see anthropic-claude-code、 Agent SDK は anthropic-agent-sdk (this skill handles model selection and SDK/CLI setup).

Directory structure

skills/anthropic-models-sdks/
  SKILL.md
  references/
    models/
      README.md
      overview.md
      choosing-a-model.md
      introducing-claude-fable-5-and-claude-mythos-5.md
      migration-guide.md
      model-ids-and-versions.md
      whats-new-opus-5.md
      whats-new-sonnet-5.md
    pricing-lifecycle/
      README.md
      glossary.md
      model-deprecations.md
      pricing.md
    sdks-cli/
      README.md
      overview.md
      apple-foundation-models.md
      cli-authentication.md
      cli-quickstart.md
      cli-scripting.md
      cli-using.md
      middleware.md
      openai-sdk-compat.md
      sdk-csharp.md
      sdk-go.md
      sdk-java.md
      sdk-php.md
      sdk-python.md
      sdk-ruby.md
      sdk-typescript.md
  scripts/
    README.md
    sdk-install.md
    cli.md
    models-api.md

Exploration procedure

Derive the category from the task, then identify the target page via the category's README.md:

1. Find the category corresponding to the task in the mapping table below
2. of that category references/{category}/README.md（scripts/ (the README.md directly under it) to identify the target page
3. Read the .md of the relevant page to check the details

Task → Category Mapping

Task	Category	Reference README
I want to know the model list, performance comparison, and how to choose the best model for an app	models	references/models/README.md
I want to know the structure of model IDs, versioning (dateless format), and migration from older models	models	references/models/README.md
I want to know the new features and behavior changes of Claude Fable 5 / Mythos 5 / Opus 5 / Sonnet 5	models	references/models/README.md
I want to know the pricing for models and features	pricing-lifecycle	references/pricing-lifecycle/README.md
I want to know model deprecation schedules, retirement dates, and recommended migration targets	pricing-lifecycle	references/pricing-lifecycle/README.md
I want to check basic LLM/AI terminology	pricing-lifecycle	references/pricing-lifecycle/README.md
I want to install and initialize the official SDKs for Python / TypeScript / Java / Go / Ruby / C# / PHP	sdks-cli	references/sdks-cli/README.md
The CLI for the Claude API (ant) — I want to know the quickstart, authentication, command operations, and scripting	sdks-cli	references/sdks-cli/README.md
I want to process SDK requests/responses with middleware, or verify with the OpenAI SDK compatibility layer	sdks-cli	references/sdks-cli/README.md
I want to use Claude from the Apple Foundation Models framework	sdks-cli	references/sdks-cli/README.md
SDK installation command・ant CLI operations and/v1/models curl commands	scripts	scripts/README.md