Anthropic · Model
Claude Haiku 4.5 API
Claude Haiku 4.5 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-haiku-4-5ProMaxAt a glance
- Provider
- Anthropic
- Included in
- Pro, Max — from $14.99/month
- Weighted-token cost
- 0.9× — a 1,000-token exchange costs 900 weighted tokens
- Context window
- 200K tokens
- Free trial
- Paid plans only — the free models are the place to start
Call Claude Haiku 4.5
Set the model to claude-haiku-4-5 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-haiku-4-5", "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-haiku-4-5", "max_tokens": 1024, "messages": [{"role": "user", "content": "Hello"}]}'Questions about Claude Haiku 4.5
- Is Claude Haiku 4.5 free on apmix?
- Not on the free trial. Claude Haiku 4.5 is included from the Pro plan ($14.99/month), which covers every model in the catalog with one monthly allowance. You can still start free on the free Claude models.
- Which plan includes Claude Haiku 4.5?
- Pro, Max. Each plan is a monthly allowance of weighted tokens shared across every model and every key; Claude Haiku 4.5 counts at 0.9× per token.
- How do I use Claude Haiku 4.5 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-haiku-4-5. The Docs page has copy-paste setup for each tool.