free tier: valid Console session rejected as 'not within OpenCode' on official Desktop app #56341

Summary

OpenCode's free-tier models (opencode/..., e.g. space-bunny-free, glm-5.3-flash-free, deepseek-v4.1-flash-free) are rejected with an AI.Error.Authentication reading "OpenCode's free tier can only be used from within OpenCode," even when running the official Desktop app with a valid, non-expired OpenCode Console session. The same free-tier models worked until ~Oct 10 and began failing ~Oct 17, with no client-side change.

Environment

• opencode version: 2.0.32
• OS: Windows_NT 10.0.26200 (win32 x64)
• Terminal: Desktop app (OpenCode Desktop); TERM=xterm-256color for embedded CLI
• Shell: C:\WINDOWS\system32\cmd.exe (background service launched by Desktop)
• Install/channel: Release, latest channel. Installed via the official Desktop installer (opencode-desktop-win-x64.exe). Background service is the Desktop-bundled CLI (opencode-cli.exe).
• Active plugins: None found in config

Reproduction

1. Launch the official OpenCode Desktop app (v2.0.32) and sign in to an OpenCode Console Personal workspace (OAuth, methodID: device). Confirm the stored Console credential is type: oauth with a future expires timestamp.
2. Start a new session and select any free-tier model, e.g. opencode/space-bunny-free or opencode/glm-5.3-flash-free.
3. Send any message.
4. Observe the request fail immediately with the error below.

Expected Behavior

Free-tier models should be usable from within the official OpenCode Desktop app when signed in with a valid Console session.

Actual Behavior

The request fails immediately with:

AI.Error.Authentication: OpenCode's free tier can only be used from within OpenCode.
Download it at https://opencode.ai and keep building.

The error originates client-side as AI.Error.Authentication. Every recent session using an opencode/* free model fails with outcome: failed and 0 tokens.

Additional Context

Verified on the local machine (all checks pass, yet the free tier still rejects):

• Genuinely "within OpenCode": the official Desktop app (OpenCode.exe) runs the shared background service (opencode-cli.exe, PID confirmed via /api/info). No third-party or npm client is involved.
• Signed in: a valid Console OAuth credential is stored — type: oauth, server https://opencode.ai/console, orgName: Personal, created 2026-10-17 06:55 UTC, expires 2026-11-16 (30 days out, not expired). Re-authenticating (fresh device-code sign-in) did not resolve it.
• Network: https://opencode.ai and https://opencode.ai/console both return HTTP 200.
• Timeline: free-tier models worked through ~Oct 10 and began failing ~Oct 17. The user's own configured providers (custom API-key providers and local models) are unaffected and continue to work.

The "Download it at opencode.ai" message appears to be a generic eligibility error that is also returned when a genuinely-embedded, signed-in client is rejected server-side. Please investigate why a valid Console session from the official Desktop app is being refused for free-tier models — this may be an account- or server-side eligibility restriction. Happy to share account details privately if needed for debugging.