Simon Willison released CORS Chat, a web UI for testing OpenAI-Responses-compatible chat endpoints locally, enabling MENA developers to evaluate Qwen 3.8 27B without cloud costs.

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CORS Chat: Open-Source Tool for Testing Qwen 3.8 Locally

Overview

FAQ

What is CORS Chat?

An open-source web tool by Simon Willison for testing OpenAI-Responses-compatible chat endpoints, working with LM Studio and OpenRouter.

How can it be used with Qwen 3.8?

Run Qwen 3.8 27B locally via LM Studio and connect using the --cors option, or via OpenRouter.

Is it suitable for MENA development teams?

Yes, it allows local model evaluation without cloud costs, helping informed decisions on adopting open-source models.

What is unique about CORS Chat?

It progressively renders SVG images during token streaming, allowing real-time viewing of generated images.

Source: Simon Willison (LLM & tools)

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