One Operation, Several Model APIs

Mon, 14 Sep 2026 05:00:12 +0100

Part 2 — Get the Model Out of the Chat Box

Right model, wrong dialect

Chapter 11’s second live run failed with an HTTP 500. The gateway, the model, and the credential were all right. The request was shaped for OpenCode’s Responses endpoint, and mimo-v2.5 is served on Chat Completions.

That looks like a configuration slip. It is a property of the ground you are building on.

OpenCode Go’s catalog, updated on 11 September 2026, lists every model on exactly one of three endpoints (OpenCode). Three of them carry this chapter:

Configuration on Programmer.ie: Modern AI programming

One Operation, Several Model APIs

Right model, wrong dialect