Anthropic · Model
Claude Opus 4.8 API
Claude Opus 4.8 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-opus-4-8MaxAt a glance
- Provider
- Anthropic
- Included in
- Max — from $29.99/month
- Weighted-token cost
- 4× — a 1,000-token exchange costs 4K weighted tokens
- Context window
- 1M tokens
- Free trial
- Paid plans only — the free models are the place to start
Call Claude Opus 4.8
Set the model to claude-opus-4-8 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-opus-4-8", "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-opus-4-8", "max_tokens": 1024, "messages": [{"role": "user", "content": "Hello"}]}'Questions about Claude Opus 4.8
- Is Claude Opus 4.8 free on apmix?
- Not on the free trial. Claude Opus 4.8 is included from the Max plan ($29.99/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 Opus 4.8?
- Max. Each plan is a monthly allowance of weighted tokens shared across every model and every key; Claude Opus 4.8 counts at 4× per token.
- How do I use Claude Opus 4.8 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-opus-4-8. The Docs page has copy-paste setup for each tool.