OpenCode "1.18.0 or newer is required to use the free tier": the fix, testedAs of Oct 31, 2026, OpenCode's free models need OpenCode 1.18 or newer. If an older build shows this error: Error: OpenCode 1.18.0 or newer is required to use the free tier you're on a pre-1.18 v1 bu3d ago · 2 min readlalipublications.hashnode.dev