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Invalid request parameters - Codex

Quick fix

OpenCode-Go's mimo-v2.6-flash fails when it does not natively support /responses; this issue provides no verified fix.

Symptom

Section titled “Symptom”
Error output
CC Switch local proxy failed while handling Codex endpoint /responses. Provider: OpenCode-Go chat; model: mimo-v2.6-flash; upstream_status: HTTP 400; cause: data: {"error":{"param":"","type":"server_error","message":"Streaming response failed: [400] Invalid request parameters"}}

Cause

Section titled “Cause”

Issue #7608 reports that on Windows with cc-switch 3.20.4, Codex received HTTP 400 from the `/responses` endpoint when requesting OpenCode-Go's mimo-v2.6-flash through the local proxy. The reporter believed the subscription, unlike DeepSeek, does not natively support the `responses` protocol, causing the streaming response to fail with `Invalid request parameters`.

The reporter expected cc-switch to route `reasoning_content` correctly, but the issue remains open. It provides no maintainer-confirmed or user-verified configuration change, version fix, or workaround.

Fix

Section titled “Fix”

  1. Confirm that the failing request uses Codex's `/responses` endpoint, with Provider set to OpenCode-Go chat and model set to `mimo-v2.6-flash`.

  2. This issue provides no verified fix steps. Until an update supports the `responses` protocol or correctly routes `reasoning_content`, this issue cannot confirm a successful configuration change.

Affected Versions

Section titled “Affected Versions”
ToolCodex
Version3.20.4
PlatformsWindows

Source Issues

Section titled “Source Issues”

This page is distilled from 1 real issues

FAQ

Section titled “FAQ”

(No FAQ yet)

Section titled “Related problems”
<thinking> tags output as body text in Claude CodeChanging the provider's apiFormat from openai_chat to anthropic, if supported upstream, can bypass inline <thinking> leakage.1 issues mergedRequest exceeds the context windowNo verified solution was provided in the original post; this issue was closed as a duplicate related to catalog configuration and automatic compression.1 issues mergedSelect Model Menu Still Shows Pre-Switch Model List - CodexClose existing Codex sessions, run `codex app-server daemon restart`, and upgrade CC Switch to v4.0.7 or later for detection and restart prompts.3 issues merged

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