DeepSeek V5 model identifiers appear in tests of DeepSeek’s official Harness repository
Partly confirmed
The takeaway
TechNode and Pandaily reported on Oct 29, 2026 that three DeepSeek V5 identifiers, deepseek-v5, deepseek-v5-open and deepseek-v5-next, appear in test scenarios for the DeepSeek-account integration of deepseek-ai/deepseek-harness, the company’s open-source agent app.
Status
- Claim
Partly confirmed
- Our reporting
- Medium confidence
- Importance
- 2 of 5
- Last verified
- 29 October 2026
Your AI and this story
- GPT-6 Astra182 days after its cutoff
- Claude Opus 5.5121 days after its cutoff
- Gemini 4 Argon212 days after its cutoff
- Grok 4.7151 days after its cutoff
None of these four assistants can know about it. The closest, Claude Opus 5.5, stops 121 days before it.
Key facts
- Where (TechNode): tests of how the Harness client handles model compatibility, i.e. which models appear in its model list and when an upgrade is required
- No specs, benchmark results or schedule are in the code (TechNode); DeepSeek V4.1 Pro, in gray testing since late September, is still not officially released (upcoming item 2026-10-01-deepseek-v4-1-pro-release)
- Pandaily’s headline adds that V4.1-Flash (1017) leads open-weight models on FrontierCode 2.0 and Artificial Analysis Index v5 (article body not readable for us)
- Not checked by us in the repository itself (GitHub code search needs a login); repository activity is high (dozens of commits a day, ~265k stars)
What happened
Placeholder names for a fifth-generation DeepSeek model showed up in public test code. Such strings often precede launches, but they say nothing about timing or capability.
Why it matters
A DeepSeek V5 would be one of the most watched Chinese releases. The “-open” suffix may point to separate open and hosted versions, but nothing about the model is confirmed.
Sources
3 sources from 3 sites. Numbers match the chips in the text.
3 sources: 1 primary, 2 press
Primary
- GitHub: deepseek-ai/deepseek-harnessgithub.com, code
Press
Changes
- Filed (TechNode read directly; Pandaily body not readable; news agent)