Free Claude Opus 5.5 via the Tokenator API

What the model is for

This model is available on a free plan with set usage limits. Claude Opus 5.5 is Anthropic's flagship model for complex logical reasoning, programming, and long-term agent management tasks, replacing Claude Opus 5. It is particularly effective when performing multi-stage changes to large codebases, verifying and finding errors in code, performing financial and scientific analysis, and working with complex graphs, charts, and screenshots. Compared to the previous version, the model handles numerical data and sources more carefully, striving to provide only the information it can confirm. Claude Opus 5.5 completes comparable tasks in fewer steps and with lower token consumption than Opus 5. The model also provides clearer progress reporting: what has been done, what results have been obtained, and what additional information is required from the user. The thinking mode is always adaptive, so the effort parameter allows you to choose a balance between the depth of reasoning, latency, and cost. Low effort levels remain effective for tasks where high response speed is particularly important.

Specification

Upstream providers

A request goes to the first available provider by priority; if it fails, Tokenator switches to the next one.

Example request

curl https://api.tokenator.top/v1/chat/completions \
  -H "Authorization: Bearer sk-your-tokenator-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "free-claude-opus-5.5",
    "messages": [{"role": "user", "content": "Hello"}]
  }'

Compatible tools

The model can be used in any tool that accepts a custom base URL: Claude Code, Codex CLI, OpenCode, Cursor, Cline, Kilo Code, Cherry Studio, DeepSeek Harness, Hermes, Pi, OpenClaw.

See also