Run Codex on Claude Haiku 5.5

by OpenAICoding agent

Codex is OpenAI's open-source coding agent for the terminal. It works from natural-language instructions to edit code across your project, run commands, and complete tasks end to end, with its source available on GitHub under Apache-2.0. On Opper, launch it on GPT, Claude, Gemini, DeepSeek and 700+ more — one key, automatic fallbacks, and a choice of region.

Run

Codexonin

Launch Codex on Claude Haiku 5.5

Set up with agents

Paste this into your coding agent (Claude Code, Cursor, Codex, and more) and it will set up and build with Opper for you.

Get your API key

Where you can run it

Claude Haiku 5.5 runs on the routes below. Route only to EU providers when your data has to stay in Europe.

Provider	Region	Training	Input	Output	Cache read
AWS Bedrock	EU	No	$0.11	$0.55	$0.01$0.14 write
Google Cloud	EU	No	$0.11	$0.55	$0.01$0.14 write
Google Cloud	EU	No	$0.11	$0.55	$0.01$0.14 write
Anthropic	US	No	$0.10	$0.50	$0.01$0.13 write
AWS Bedrock	Multi	No	$0.10	$0.50	$0.01$0.13 write
Azure	Multi	No	$0.10	$0.50	$0.01$0.13 write
Google Cloud	Multi	No	$0.10	$0.50	$0.01$0.13 write
Google Cloud	Multi	No	$0.10	$0.50	$0.01$0.13 write