TopxAI · Model prices · Anthropic
Claude Sonnet 5.5 API pricing
Model id claude-sonnet-5-5. $1 input / $5 output per 1M tokens on the lowest-priced route; every route is listed below. Prices are fixed in USD, charged from prepaid credit, and every request writes one usage-log row with the route and the charge.
Claude Sonnet 5.5: balanced speed, cost and intelligence for everyday workloads with a 1M-token context.
Prices by route
| Route | Input (USD / 1M tokens) | Output (USD / 1M tokens) | Cache read (USD / 1M tokens) | Cache write (USD / 1M tokens) | Cache write (1h) (USD / 1M tokens) |
|---|---|---|---|---|---|
| Provider list price (checked 2026-10-02) | $2 | $10 | $0.2 | $2.5 | $4 |
| Official line | $1.8 | $9 | $0.18 | $2.25 | $3.6 |
| Shared pool | $1 | $5 | $0.1 | $1.25 | $2 |
Input, output and cache lanes bill per million tokens. A whole-request long-context row applies once the input context of a request reaches the threshold shown. An Auto-route key sends each request to the lowest-priced route that serves the model.
Endpoints
POST /v1/messages: Anthropic Messages (x-api-key)POST /v1/chat/completions: OpenAI Chat Completions (Bearer)
Call claude-sonnet-5-5
Base URL https://ai.topxea.com/v1 for OpenAI-style SDKs, https://ai.topxea.com for the Anthropic SDK; the API key goes where the provider's key would go.
curl https://ai.topxea.com/v1/messages \
-H "x-api-key: $TOPXAI_API_KEY" \
-H "anthropic-version: 2023-06-01" \
-H "content-type: application/json" \
-d '{"model": "claude-sonnet-5-5", "max_tokens": 256, "messages": [{"role": "user", "content": "Say hello in one sentence."}]}'Related
- Moving to Claude Sonnet 5.5 on TopxAI
- Claude Code with TopxAI: ANTHROPIC_BASE_URL and the key
- Cursor with TopxAI: override the OpenAI base URL
- Cline and Roo Code with TopxAI: the OpenAI-compatible provider
- Continue with TopxAI: models in config.yaml
- Aider with TopxAI: OPENAI_API_BASE and the model name
- opencode with TopxAI: a custom provider in opencode.json
- LobeChat with TopxAI: the OpenAI proxy address
- Cherry Studio with TopxAI: first chat and endpoint setup
- ChatBox with TopxAI: a custom provider
- LangChain with TopxAI: ChatOpenAI and ChatAnthropic with a base URL
- Vercel AI SDK with TopxAI: createOpenAI, createAnthropic and openai-compatible
- LiteLLM with TopxAI: proxy config and the Python SDK
- Dify with TopxAI: the OpenAI-API-compatible provider
- n8n with TopxAI: an OpenAI credential with a base URL
- llm CLI with TopxAI: extra-openai-models.yaml
- TopxAI vs OpenRouter: what is the same and what differs
- Connect your SDK
- Shared pool, official line and auto route
- How requests are billed
- Every model's price
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