Anthropic · Model
Claude Sonnet 5 API
Claude Sonnet 5 answers at api.apmix.ai under the id below — one key and one monthly plan, on the OpenAI and Anthropic wire formats your tools already speak. No separate Anthropic account, no per-provider bill.
Model id
anthropic/claude-sonnet-5ProMaxAt a glance
- Provider
- Anthropic
- Included in
- Pro, Max — from $14.99/month
- Weighted-token cost
- 2× — a 1,000-token exchange costs 2K weighted tokens
- Context window
- 1M tokens
- Reasoning
- Yes — thinks before it answers
- Free tier
- Paid plans only — the free models are the place to start
Call Claude Sonnet 5
Set the model to claude-sonnet-5 in any OpenAI- or Anthropic-compatible client. Both base URLs accept the same apmix key.
OpenAI-compatible · Chat Completions
curl https://api.apmix.ai/v1/chat/completions \
-H "Authorization: Bearer apx_live_YOUR_KEY" \
-H "Content-Type: application/json" \
-d '{"model": "claude-sonnet-5", "messages": [{"role": "user", "content": "Hello"}]}'Anthropic-compatible · Messages
curl https://api.apmix.ai/v1/messages \
-H "x-api-key: apx_live_YOUR_KEY" \
-H "anthropic-version: 2023-06-01" \
-H "Content-Type: application/json" \
-d '{"model": "claude-sonnet-5", "max_tokens": 1024, "messages": [{"role": "user", "content": "Hello"}]}'Questions about Claude Sonnet 5
- Is Claude Sonnet 5 free on apmix?
- Not on the free tier. Claude Sonnet 5 is included from the Pro plan ($14.99/month), with one monthly allowance shared across every model in the plan. You can still start free on the free models.
- Which plan includes Claude Sonnet 5?
- Pro, Max. Each plan is a monthly allowance of weighted tokens shared across every model and every key; Claude Sonnet 5 counts at 2× per token.
- How do I use Claude Sonnet 5 in Claude Code, Codex CLI or Cursor?
- Point the tool at apmix — https://api.apmix.ai/v1 for OpenAI-compatible clients, https://api.apmix.ai for Anthropic-compatible ones — with your apmix key, and set the model to claude-sonnet-5. The Docs page has copy-paste setup for each tool.