Zen free models fail with FreeTierError in official CLI 1.18.34 (Linux) #52907

Description

Since this morning (2026-10-03), every OpenCode Zen free model fails with:

Error from provider (Console): OpenCode's free tier can only be used from within OpenCode

This is the official OpenCode CLI/TUI, latest release, with no proxy, no plugins, and no override of the opencode provider. It worked yesterday with the same setup.

Other providers configured in the same install (OpenRouter, custom openai-compatible providers) work fine from the same machine at the same time, so networking and the client itself are working.

Checked locally:

• opencode upgrade reports 1.18.34 is already the latest
• No HTTP(S)_PROXY, no opencode.ai entry in /etc/hosts
• Unsetting OPENAI_BASE_URL / ANTHROPIC_BASE_URL makes no difference
• All permissions in opencode.json are allow (no tools disabled, so this is not the tools.read = false case from tools.read = false in opencode.json makes all zen free-tier models fail with "free tier can only be used from within OpenCode" #51315 / policy: deny shell * on custom agent breaks free tier with "can only be used from within OpenCode" #50627)
• ~/.local/share/opencode/auth.json has no opencode entry (anonymous free tier)

Log excerpt (~/.local/share/opencode/log/opencode.log):

level=ERROR message="stream error" providerID=opencode modelID=space-bunny-free small=false agent=build mode=primary error.error="AI_APICallError: Error from provider (Console): OpenCode's free tier can only be used from within OpenCode"

Looks like the same server-side regression reported today in #52899, #52904, #52905 and #49433.

Plugins

None (only the @opencode-ai/plugin package present by default in ~/.config/opencode)

OpenCode version

1.18.34 (installed via curl install script)

Steps to reproduce

1. opencode run -m opencode/big-pickle "reply with just: ok"
2. Same result with opencode/space-bunny-free and opencode/fledge-alpha-free (TUI, build agent)
3. Request fails immediately with the FreeTierError above

For comparison, opencode run -m openrouter/<model> "reply with just: ok" succeeds from the same machine.

Screenshot and/or share link

Error appears in the TUI on every message with Fledge Alpha Free (OpenCode Zen), build agent.

Operating System

Fedora 44, Linux 7.2.7-200.fc44.x86_64

Terminal

Reproduced in both the TUI and non-interactive opencode run (xterm-256color)