Reach for this when you are wiring Claude into your own product or back-office and want production-grade behaviour.
The Anthropic developer API at platform.claude.com. Three live tiers as of May 2026: Opus 4.8 (most capable, agentic, codebase-scale), Sonnet 4.6 (balanced, beats prior-generation Opus on coding evals), Haiku 4.5 (fast and cheap). Features include prompt caching, batch inference, files API, citations, extended thinking, tool use, and the Computer Use beta. The Claude Agent SDK is the recommended path for building agentic apps; the Files API and Batch API matter for any document-heavy workflow.
Per-token cost is materially higher than Gemini or DeepSeek for equivalent jobs at the Opus tier; you need to be disciplined about routing easy work to Haiku or Sonnet. No native image generation endpoint; you wire in a separate provider. Rate limits on Tier 1 accounts feel tight for any genuine production workload.
Haiku 4.5 at one US dollar input, five US dollars output per million tokens. Sonnet 4.6 at three US dollars input, fifteen US dollars output. Opus 4.7 at five US dollars input, twenty-five US dollars output. Opus 4.8 at the same headline pricing as 4.7. Prompt caching, batch, and contextual retrieval each carry separate discounts.