Claude API Cost Calculator
Estimate your Anthropic API spend across the current Claude lineup — Fable 5.1, Opus 5.5, Opus 5, Sonnet 5.5, Sonnet 5, and Haiku 5.5 — plus legacy models. See cost per request, cost per 1K requests, and monthly totals.
Cost Estimate
Based on published Anthropic API pricing. Actual costs may vary.
All Claude Models — Side by Side
Compare costs across every Claude model for your usage pattern
Claude vs Competitor Pricing
How do Claude models compare to alternatives from OpenAI, Google, and DeepSeek?
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How Claude API Pricing Works
Anthropic prices Claude models based on input tokens (your prompts) and output tokens (model responses). Pricing is per 1 million tokens. There are no monthly fees — you pay only for what you use.
Claude models are priced in tiers: Premium (Fable 5.1, Opus 5.5, Opus 5) for complex reasoning, Mid-tier (Sonnet 5.5, Sonnet 5) for balanced performance, and Budget (Haiku 5.5) for high-volume simple tasks.
Claude API Pricing (2026)
- Claude Fable 5.1: $10.00 input / $50.00 output per 1M tokens — 1M context, demanding reasoning and long-horizon agents
- Claude Opus 5.5: $4.00 input / $20.00 output per 1M tokens — 1M context, current flagship for agentic coding and knowledge work
- Claude Opus 5: $5.00 input / $25.00 output per 1M tokens — 1M context, previous Opus generation
- Claude Sonnet 5.5: $2.00 input / $10.00 output per 1M tokens — 1M context, best value for most tasks
- Claude Haiku 5.5: $0.10 input / $0.50 output per 1M tokens for prompts ≤100K tokens — 1M context, cheapest Claude ($0.50/$2.50 above 100K)
- Claude Haiku 4.5: $1.00 input / $5.00 output per 1M tokens — 200K context, previous generation
When to Use Each Claude Model
Claude Opus 5.5 — Use for long-running agentic coding, complex multi-step reasoning, and tasks where quality is paramount. Worth the premium for legal, medical, or research applications.
Claude Sonnet 5.5 — The sweet spot for most developers. Excellent at code generation, content writing, RAG, and chatbots. Half the token price of Opus 5.5.
Claude Haiku 5.5 — Best for high-volume, simpler tasks: classification, routing, extraction, and chatbot responses. 40x cheaper on input than Opus 5.5.
How to Reduce Claude API Costs
- Use Haiku for simple tasks: Route classification, routing, and simple chat to Haiku 5.5 at $0.10/$0.50 (prompts ≤100K) — 40x cheaper on input than Opus 5.5
- Optimize prompts: Shorter, more specific prompts reduce input tokens
- Set max_tokens: Don't let Claude generate 4000 tokens when 200 will do
- Use streaming: Streaming responses let users see results faster, reducing perceived latency
Read our full guide: How to Cut Your AI API Bill by 50%
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Related Reading
- Claude Fable 5.1 Pricing Calculator — Estimate caching, Batch and US-only inference costs
- Anthropic Pricing Guide — Complete Anthropic API pricing breakdown
- OpenAI Pricing Guide — How OpenAI API pricing compares
- AI API Cost Per Request — The metric developers actually need
- Cheapest LLM APIs in 2026 — Full ranking of every model
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