Claude Sonnet 5.5 API
claude-sonnet-5-5AnthropicCommercial useNew API verifiedText & reasoning
Anthropic's Claude Sonnet 5.5 — the balanced Claude for everyday coding, writing and analysis, served through one API.
by Anthropic
Pricing: Input 75 credits / 1M tokens (≈ $0.75), Output 375 credits / 1M tokens (≈ $3.75). Cached Input 7.5 credits / 1M tokens (≈ $0.075), Cache Writes 93.75 credits / 1M tokens (≈ $0.9375) — applied automatically when the upstream reports cached tokens for your prompt; there is no field to request them.
Save up to 66%with the $1,250 top-up pack (+10% bonus) — 63% lower than direct rates even without itTop up24H Status Monitor
Operational24h agonow
MODEL
claude-sonnet-5-5
Tools
Web Search
Web search feeds the results back as input tokens, so a searched turn typically costs many times a normal turn (measured: 6–87×). Billed per token as usual, plus 1.34 credits per search.
Max tokens
Stream Response
Start a conversation with Claude Sonnet 5.5
Input 75 · Output 375 cr / 1M · billed per token
You only pay for successful generations — if a task fails or returns no result, its credits are refunded automatically, never charged. And your credits never expire: top up once and spend at your own pace.1 credit = $0.01 USDTop up $1,250 for +10% bonus credits → up to ~9% more off every call.Top up credits
Claude Sonnet 5.5 API pricing4 prices
Model & ModalityCredits / GenOur Price (USD)Direct / Standard Price (USD)Base savingsSavings with top-up$1,250 top-up · +10% credits
Claude Sonnet 5.5, Input
textAnthropic
Credits / Gen75per million tokens
Our Price (USD)$0.75
Direct / Standard Price (USD)$2
Base savings−62.5%
Savings with top-up · $1,250 · +10%−66% ↓
Claude Sonnet 5.5, Output
textAnthropic
Credits / Gen375per million tokens
Our Price (USD)$3.75
Direct / Standard Price (USD)$10
Base savings−62.5%
Savings with top-up · $1,250 · +10%−66% ↓
Claude Sonnet 5.5, Cache Writes
textAnthropic
Credits / Gen93.75per million tokens
Our Price (USD)$0.9375
Direct / Standard Price (USD)$2.5
Base savings−62.5%
Savings with top-up · $1,250 · +10%−66% ↓
Claude Sonnet 5.5, Cached Input
textAnthropic
Credits / Gen7.5per million tokens
Our Price (USD)$0.075
Direct / Standard Price (USD)$0.1
Base savings−25.0%
Savings with top-up · $1,250 · +10%−32% ↓
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