Unverified50% confidenceSolutionExact time
Users of third-party Anthropic-compatible endpoints (ANTHROPIC_BASE_URL) have been receiving HTTP 400 on every turn since 2.1.265; the root cause was a regular expression in the Artifact tool input schema being rejected by these endpoints, and the new version has fixed this.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
9/11/2026
First Seen
Valid until: 12/10/2026
Sources
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