DeepSeek V5 placeholder IDs found in Harness code

Developers spotted deepseek-v5, deepseek-v5-open and deepseek-v5-next identifiers in a test file of DeepSeek's official Harness repository on GitHub. No V5 announcement exists and the entries appear to be placeholders; the current lineup is V4-Pro and V4.1-Flash, which scored 28% on FrontierCode 2.0, the best among open-weight models.

• The V5 identifiers were added in a September 24 commit to provider.spec.ts
• v5-next requires client version 99.0.0-alpha.1, v5-open requires 0.0.1
• DeepSeek V4.1-Flash-1017 scored 28% on FrontierCode 2.0, Kimi K3.1 Pro 25.5%
• On Intelligence Index v5 it scored 32 versus 58 for Claude Opus 5.5