Claude API Cost Calculator

Claude Opus 4 is Anthropic's flagship for demanding tasks, complex analysis, long-document reasoning, and research-grade writing. Claude Sonnet 4 is the workhorse: strong capability at a fraction of Opus pricing, suitable for most production apps. Claude Haiku 4 is the fastest and cheapest, ideal for high-volume classification, triage, and lightweight generation.

Output generation is sequential, the model must produce each token before generating the next. Input tokens are processed in parallel. This asymmetry makes generation significantly more compute-intensive, which is why output tokens are consistently priced higher across all providers including Anthropic.

Use the AI Token Counter or AI Prompt Cost Estimator to paste your prompt and get an immediate token count and cost comparison across all Claude models. Counts are approximate but accurate enough for pre-build cost planning.

Yes. Anthropic offers prompt caching for repeated content like long system prompts or shared context. Cached tokens are priced lower than regular input tokens. If your application sends the same system prompt on every call, enabling caching can meaningfully reduce costs at scale. This calculator shows base rates without caching applied.

Estimates use Anthropic's published per-token rates. Because this tool uses a GPT-compatible tokenizer as a proxy for Claude's tokenizer, actual token counts may vary by a small percentage. For production budgeting, add a 10–15% buffer and monitor actual usage in the Anthropic console.