diff --git a/src/main/opencode/opencode-model-startup-plan.ts b/src/main/opencode/opencode-model-startup-plan.ts
index ffdeb02d167..84b0599ce88 100644
--- a/src/main/opencode/opencode-model-startup-plan.ts
+++ b/src/main/opencode/opencode-model-startup-plan.ts
@@ -24,8 +24,6 @@ type StartupScope = {
   inputs: AgentStartupPlanInputs
   cwd: string
   isWsl?: boolean
-  /** TEMPORARY parity: the platform main checked this model on, when it differs. */
-  modelCheckPlatform?: NodeJS.Platform
   hostIdentity?: string
   signal?: AbortSignal
 }
@@ -51,20 +49,20 @@ export async function prepareOpenCodeModelStartupInputs(
   if (typeof model !== 'string' || model.trim().length === 0) {
     refuseModel()
   }
-  const platform = options.modelCheckPlatform ?? inputs.platform
   if (
     Object.entries(inputs.sessionOptions ?? {}).some(
       ([key, value]) => key !== 'model' && value !== undefined
     ) ||
     inputs.isRemote ||
     options.isWsl ||
-    platform !== process.platform ||
+    inputs.platform !== process.platform ||
     options.signal?.aborted
   ) {
     refuseModel()
   }
   const command =
-    inputs.cmdOverrides.opencode || getTuiAgentLaunchCommand(TUI_AGENT_CONFIG.opencode, platform)
+    inputs.cmdOverrides.opencode ||
+    getTuiAgentLaunchCommand(TUI_AGENT_CONFIG.opencode, inputs.platform)
   const env: Record<string, string> = {}
   for (const [key, value] of Object.entries({ ...process.env, ...inputs.agentEnv })) {
     if (value !== undefined) {
diff --git a/src/main/runtime/agent-launch-scope-runtime.ts b/src/main/runtime/agent-launch-scope-runtime.ts
index 4edcfedfaa7..fe16ea74cb5 100644
--- a/src/main/runtime/agent-launch-scope-runtime.ts
+++ b/src/main/runtime/agent-launch-scope-runtime.ts
@@ -69,22 +69,6 @@ export function agentLaunchProjectRuntime(
   return pathDecides ? undefined : runtime
 }
 
-/** TEMPORARY parity: main checked an OpenCode model on the platform it quoted for, which in a
- *  `\\wsl$` repo not set to WSL was the Windows host. */
-export function openCodeModelCheckPlatform(
-  store: LaunchScopeRuntimeStore,
-  scope: TerminalWorkspaceLaunchScope,
-  platform: NodeJS.Platform
-): NodeJS.Platform {
-  return scope.repo && !scope.connectionId && isWslUncPath(scope.path)
-    ? executionRuntimePlatform(
-        resolveLocalProjectRuntimeForWorktreeId(store, scope.id),
-        undefined,
-        process.platform
-      )
-    : platform
-}
-
 /** The one runtime fact for an agent launched into this workspace. Throws, under
  *  `PROJECT_RUNTIME_REPAIR_REQUIRED_CODE` and in the settings page's words, when its runtime needs
  *  repair. */
diff --git a/src/main/runtime/opencode-wsl-folder-launch-host.test.ts b/src/main/runtime/opencode-wsl-folder-launch-host.test.ts
index ad38c368385..32e8293a7d6 100644
--- a/src/main/runtime/opencode-wsl-folder-launch-host.test.ts
+++ b/src/main/runtime/opencode-wsl-folder-launch-host.test.ts
@@ -86,12 +86,13 @@ it('refuses an agent whose WSL distro is gone, under its own code', async () =>
   expect(response).toMatchObject({ error: { code: PROJECT_RUNTIME_REPAIR_REQUIRED_CODE, message } })
 })
 
-// TEMPORARY parity: in a `\\wsl$` repo set to Windows host, OpenCode's model is checked on Windows,
-// as on main; its command is still written for Linux, where it runs.
-it('checks an OpenCode model on Windows in a WSL-share repo set to Windows host', async () => {
+// OpenCode runs in WSL in a `\\wsl$` repo, where Orca can't verify a model yet, so picking one is
+// refused rather than checked on Windows.
+it('refuses an OpenCode model in a WSL-share repo set to Windows host', async () => {
   const shareScope = { ...scope, id: 's', path: share.path, repo: share, folderWorkspace: null }
   Object.assign(runtime, { resolveTerminalWorkspaceLaunchScope: async () => shareScope })
   const request = { clientOperationId, worktree: 'id:s', agent: 'opencode' } as const
-  await runtime.createAgentSession({ ...request, launchPreferences: { model: 'm' } })
-  expect(spawned()).toEqual(['linux'])
+  const picked = runtime.createAgentSession({ ...request, launchPreferences: { model: 'm' } })
+  await expect(picked).rejects.toThrow('cannot verify this OpenCode')
+  expect(spawned()).toEqual([])
 })
diff --git a/src/main/runtime/orca-runtime-create-agent-session.ts b/src/main/runtime/orca-runtime-create-agent-session.ts
index 0d0e2500912..a74335fe285 100644
--- a/src/main/runtime/orca-runtime-create-agent-session.ts
+++ b/src/main/runtime/orca-runtime-create-agent-session.ts
@@ -14,7 +14,6 @@ import { createHash } from 'node:crypto'
 import { isTuiAgentEnabled } from '../../shared/tui-agent-selection'
 import { resolveAgentStartupPlanInputs } from '../../shared/agent-startup-plan-inputs'
 import { agentLaunchQuotingShell } from '../../shared/agent-launch-runtime'
-import { openCodeModelCheckPlatform } from './agent-launch-scope-runtime'
 import { buildExecutionHostAgentStartupPlan } from '../opencode/opencode-model-startup-plan'
 import type { RuntimeTerminalCreate } from '../../shared/runtime-types'
 import type {
@@ -147,11 +146,6 @@ export class OrcaRuntimeWithCreateAgentSession extends OrcaRuntimeWithGetAgentSe
       })
       const startup = await buildExecutionHostAgentStartupPlan({
         inputs: startupArgs,
-        modelCheckPlatform: openCodeModelCheckPlatform(
-          this.store!,
-          workspace,
-          launchRuntime.platform
-        ),
         cwd: startupCwd ?? workspace.path,
         prompt: request.prompt ?? '',
         promptDelivery: request.promptDelivery,
diff --git a/src/main/runtime/runtime-agent-terminal-startup.ts b/src/main/runtime/runtime-agent-terminal-startup.ts
index 8c1ae331464..7e57f9c8017 100644
--- a/src/main/runtime/runtime-agent-terminal-startup.ts
+++ b/src/main/runtime/runtime-agent-terminal-startup.ts
@@ -27,7 +27,6 @@ import {
 import {
   agentLaunchPlatformForScope,
   agentLaunchProjectRuntime,
-  openCodeModelCheckPlatform,
   resolveAgentLaunchRuntime
 } from './agent-launch-scope-runtime'
 import { resolveQoderTerminalCommand } from './qoder-terminal-command-resolution'
@@ -182,9 +181,6 @@ async function buildRuntimeAgentTerminalStartupOptions(
       shell: agentLaunchQuotingShell(runtime),
       sessionOptions: host.toSessionOptions(opts.launchPreferences)
     }),
-    ...(host.store
-      ? { modelCheckPlatform: openCodeModelCheckPlatform(host.store, workspace, runtime.platform) }
-      : {}),
     prompt: opts.startupPrompt ?? '',
     cwd: resolveTerminalStartupCwd(workspace.path, opts.cwd) ?? workspace.path,
     hostIdentity: host.hostIdentity,