WSL: opencode-go Forbidden intermittently — works fine on Windows with same IP/version

Description

Environment

• OpenCode version: 1.18.18 (both WSL and Windows)
• OS: WSL2 Ubuntu 22.04 (kernel 6.18.33.2) + Windows 10
• Public IP: same for both (101.87.170.107)
• Provider: opencode-go (Go plan)

Problem

WSL Linux build gets AI_APICallError: Forbidden on opencode-go API calls.
Windows build with the same account/IP/version works perfectly.

The error is intermittent — sometimes it works, sometimes it doesn't.
Total Forbidden errors in today's log: 140

Affected models (from log)

• deepseek-v4-flash (36 errors)
• deepseek-v4-pro (18 errors)
• deepseek-v4-flash-free (16 errors)
• ox-alpha-free (3 errors)
• x-preview-f-free (2 errors)
• big-pickle (2 errors)

Both opencode-go (57 errors) and opencode (20 errors) providers are affected.

Additional evidence

• https://models.opencode.ai/api.json also returned 403 at times from WSL
• All API endpoints (api.opencode.ai, gateway.opencode.ai) are reachable from WSL
• Same auth.json key is used on both sides

Log excerpt

timestamp=2026-08-23T11:36:13.268Z level=ERROR message="stream error" providerID=opencode-go modelID=deepseek-v4-flash error.error="AI_APICallError: Forbidden" timestamp=2026-08-23T11:40:03.124Z level=ERROR message="Failed to fetch models.dev" cause="403 GET https://models.opencode.ai/api.json"

Expected behavior

WSL should work the same as Windows since they share the same network and account.

Plugins

No response

OpenCode version

No response

Steps to reproduce

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Screenshot and/or share link

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Operating System

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Terminal

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