1.67.0 (2026-09-04) Features models: add Claude Fable 5.1 (#928) (6c85fcd) Bug Fixes errors: classify an oversized prompt as a 400, not a retryable 500 (#919) (1ea97d0) errors: classify the credits-era per-tier limit refusal (#929) (85d18d9) nix: repair nix build, broken on Darwin since 1.62.7 (#916) (3ff4c0a)