Anthropic
Anthropic API Pricing 2026
Current API prices per 1 million tokens.
Model
| Model | Rate | Price / 1M tokens |
|---|---|---|
| Claude Fable 5.1 Anthropic's latest Fable model for demanding reasoning, long-horizon agentic work and complex coding. 1M context · 128K max output · adaptive thinking always on · text/image input. Input, output and cache-write rates are unchanged from Fable 5. Cache reads are 75% cheaper at $0.25 per 1M tokens, which Anthropic estimates reduces typical token-billed workloads by about 25%. | Input | $10 |
| Claude Fable 5.1 | 5m cache write | $12.5 |
| Claude Fable 5.1 | 1h cache write | $20 |
| Claude Fable 5.1 | Cache read / hit & refresh | $0.25 |
| Claude Fable 5.1 | Output | $50 |
| Claude Opus 5.5 Anthropic's latest Opus model for long-running agents, coding and professional work. Available on the Claude Platform as claude-opus-5-5; Fast mode is priced separately. Standard pricing per million tokens is $4 input, $5 for a 5-minute cache write, $8 for a 1-hour cache write, $0.20 cache reads and $20 output. Fast mode costs $8 input and $40 output. | Input | $4 |
| Claude Opus 5.5 | Cache write — 5 minute TTL | $5 |
| Claude Opus 5.5 | Cache write — 1 hour TTL | $8 |
| Claude Opus 5.5 | Cache read | $0.2 |
| Claude Opus 5.5 | Output | $20 |
| Claude Opus 5.5 | Input — Fast mode | $8 |
| Claude Opus 5.5 | Output — Fast mode | $40 |
| Claude Fable 5 Previous Fable generation retained for comparison and existing integrations. 1M context · 128K max output · previous Fable generation; Fable 5.1 is the current upgrade. | Input | $10 |
| Claude Fable 5 | Output | $50 |
| Claude Opus 5 Top Opus tier for complex agentic coding and enterprise work at half Fable's token price. 1M context · 128K max output · thinking on by default. | Input | $5 |
| Claude Opus 5 | Output | $25 |
| Claude Sonnet 5 High-performance Claude tier for coding and agents at permanent $2/$10 API pricing. 1M context · 128K max output · $2 input / $10 output per 1M tokens. Anthropic made the introductory $2 input / $10 output per 1M tokens pricing permanent on August 10, 2026; the previously planned $3/$15 pricing no longer applies. | Input | $2 |
| Claude Sonnet 5 | Output | $10 |
| Claude Haiku 4.5 Anthropic's fastest, most cost-efficient Claude tier for scaled and latency-sensitive workloads. Fast small-model tier · text/image understanding · prompt caching and batch discounts. | Input | $1 |
| Claude Haiku 4.5 | Output | $5 |
| Claude Opus 4.8 Previous Opus generation retained for comparison and existing integrations. Previous-generation Opus; Opus 5 is the current upgrade at the same token price. | Input | $5 |
| Claude Opus 4.8 | Output | $25 |
How API token cost is calculated
Multiply the number of tokens by the provider rate, then divide by 1,000,000.
cost = tokens × price per 1M ÷ 1,000,000
Example: 250,000 input tokens at $2 / 1M = $0.50.
AI Price History
- Claude Sonnet 5 — input $3 → $2
- Claude Sonnet 5 — output $15 → $10