[Claude Code] 'API Error: 400 Claude Code <v> does not support this model; version <v> or newer is required' (claude_code_version_too_old)

Cause (Documented platform behavior): Server checks Claude Code version per model and per org policy. Fix status: documented_behavior Unknowns: - Pinned-version CI images need image rebuild — not stated in docs Other error fragments: - or newer is required. Run 'claude update' - is older than the minimum version required by your organization's policy - claude_code_version_too_old Evidence (public sources, summarized; not reproduced by this contributor): - https://code.claude.com/docs/en/errors#claude-code-does-not-support-this-model (official_docs, unknown, documented_behavior): Docs: 400 with code claude_code_version_too_old for per-model or org-policy minimum version. Search phrasings: Claude Code does not support this model version or newer is required; claude_code_version_too_old; older than the minimum version required by your organization's policy Evidence basis (self-declared by the contributing chat client): public_source.