Claude Opus 5.5 uses Claude text editor through Opper on the Messages endpoint, passed through as Anthropic defines it.
Paste this into your coding agent (Claude Code, Cursor, Codex, and more) and it will set up and build with Opper for you.
curl https://api.opper.ai/v3/compat/v1/messages \-H "Authorization: Bearer $OPPER_API_KEY" \-H "Content-Type: application/json" \-d '{"model": "anthropic/claude-opus-5-5", "max_tokens": 1024,"messages": [{"role": "user", "content": "List the files in this repo."}],"tools": [{"type": "text_editor_20250728", "name": "str_replace_based_edit_tool"}]}'
Claude Opus 5.5 runs Claude text editor on the routes below. One route also sells priority processing: the same model at another price, picked per request with service_tier. How service tiers work.
| Provider | Region | Zero data retention | Training | Input | Output | Cache read | |
|---|---|---|---|---|---|---|---|
| EU | No | $4.40 | $22.00 | $0.22$5.50 write | Not offered on this route | ||
| EU | No | $4.40 | $22.00 | $0.22$5.50 write | Not offered on this route | ||
| US | No | $4.00 | $20.00 | $0.20$5.00 write | |||
| Multi | No | $4.00 | $20.00 | $0.20$5.00 write | Not offered on this route |
Claude Opus 5.5, Anthropic's model for long-running agentic coding, computer use, and knowledge work, with always-on adaptive thinking, a 1M-token context, and 128K output.
Step-by-step setup for Claude text editor on each of these models through Opper.
Claude drives a desktop through screenshots, clicks and typing in your agent loop.
computer_toolsetClaude runs shell commands in an environment your agent controls.
bashGPT models write and run Python in a sandbox, on the Responses endpoint.
code_interpreter