{"schema":"postcutoff/event@1","as_of":"2026-11-02T13:31:00+01:00","url":"https://postcutoff.com/e/2026-10-29-deepseek-v5-identifiers-harness-tests/","md":"https://postcutoff.com/e/2026-10-29-deepseek-v5-identifiers-harness-tests/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"human editor","policy":"https://postcutoff.com/about/"},"license":null,"id":"2026-10-29-deepseek-v5-identifiers-harness-tests","date":"2026-10-29","date_precision":"day","short_title":"DeepSeek V5 model identifiers appear in tests of DeepSeek's official Harness repository","deck":null,"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.","category":"model-release","category_label":"Model releases","importance":2,"confidence":"medium","status":{"key":"partly","labels":["Partly confirmed"]},"sources":[{"n":1,"title":"GitHub: deepseek-ai/deepseek-harness","url":"https://github.com/deepseek-ai/deepseek-harness","type":"code","group":"primary","domain":"github.com"},{"n":2,"title":"TechNode: DeepSeek V5 identifiers surface in official Harness code repository (Oct 29)","url":"https://technode.com/2026/10/29/deepseek-v5-identifiers-surface-in-official-harness-code-repository/","type":"press","group":"press","domain":"technode.com"},{"n":3,"title":"Pandaily: DeepSeek V5 placeholder IDs show up in Harness code; V4.1-Flash leads open weights on FrontierCode (Oct 29)","url":"https://pandaily.com/deepseek-v5-placeholder-identifiers-harness-code-v4-1-flash-1017-frontiercode-2-0-aa-index-v5","type":"press","group":"press","domain":"pandaily.com"}],"official":1,"filed":"2026-10-29","updated":"2026-10-29","orgs":["DeepSeek"],"title":"DeepSeek V5 model identifiers (deepseek-v5, deepseek-v5-open, deepseek-v5-next) appear in tests of DeepSeek's official Harness repository","summary":"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. One test lets the deepseek-v5-open entry appear next to DeepSeek Flash; the others trigger client-upgrade responses. The tests contain no specifications, benchmarks or release dates, and DeepSeek has announced nothing.","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)"],"key_numbers":[],"tags":["deepseek","leak","model-ids","harness","china","upcoming"],"science":null,"body_md":"## What happened\n\nPlaceholder names for a fifth-generation DeepSeek model showed up in public test code. Such strings often precede launches, but\nthey say nothing about timing or capability.\n\n## Why it matters\n\nA DeepSeek V5 would be one of the most watched Chinese releases. The \"-open\" suffix may point to separate open and hosted versions,\nbut nothing about the model is confirmed.","disputed":[],"related":[{"id":"2026-10-17-deepseek-v4-1-flash-1017","url":"https://postcutoff.com/e/2026-10-17-deepseek-v4-1-flash-1017/","date":"2026-10-17","date_precision":"day","short_title":"DeepSeek-V4.1-Flash-1017 update: big agentic-coding gains, same price","deck":null,"takeaway":"V4.1-Flash was already the open-weight model many developers used as a cheap coding agent.","category":"model-release","category_label":"Model releases","importance":3,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":13,"official":5,"filed":"2026-10-17","updated":"2026-10-29","orgs":["DeepSeek"]},{"id":"2026-09-30-deepseek-harness-desktop-v0-2","url":"https://postcutoff.com/e/2026-09-30-deepseek-harness-desktop-v0-2/","date":"2026-09-30","date_precision":"day","short_title":"DeepSeek releases Harness v0.2 preview with desktop apps for macOS and Windows","deck":null,"takeaway":"DeepSeek is moving from models and a chat app into agent products, in the same space as Claude Cowork/Claude Code and OpenAI's Codex app.","category":"agents","category_label":"Agents","importance":3,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":8,"official":4,"filed":"2026-10-02","updated":"2026-10-12","orgs":["DeepSeek"]},{"id":"2026-09-28-deepseek-v4-1-pro-gray-test","url":"https://postcutoff.com/e/2026-09-28-deepseek-v4-1-pro-gray-test/","date":"2026-09-28","date_precision":"day","short_title":"DeepSeek V4.1 Pro enters gray testing as reports say DeepSeek is training a 2T model and planning an 8T one on Huawei chips","deck":null,"takeaway":"It shows how far China's top open lab is scaling on non-NVIDIA hardware.","category":"model-release","category_label":"Model releases","importance":3,"confidence":"medium","status":{"key":"partly","labels":["Partly confirmed"]},"sources":7,"official":2,"filed":"2026-09-29","updated":"2026-10-02","orgs":["DeepSeek","Huawei"]}],"people":[],"posts":[],"videos":[],"models":[],"changes":[{"date":"2026-10-29","type":"filed","text":"Created (TechNode read directly; Pandaily body not readable; news agent)"}],"provenance":{"agents":[{"model":"Claude Opus 5.5","maker":"Anthropic","tool":"Claude Code"}],"filed":"2026-10-29","run":null,"sources_read":"TechNode read directly; Pandaily body not readable; news agent","updated":"2026-10-29","human_review":null,"version":{"date":"2026-10-29"}},"gaps":[{"model_id":"gpt-6-astra","name":"GPT-6 Astra","cutoff":"2026-04","days_after":182,"in_training_data":false},{"model_id":"claude-opus-5-5","name":"Claude Opus 5.5","cutoff":"2026-06","days_after":121,"in_training_data":false},{"model_id":"gemini-4-argon","name":"Gemini 4 Argon","cutoff":"2026-03","days_after":212,"in_training_data":false},{"model_id":"grok-4-7","name":"Grok 4.7","cutoff":"2026-05","days_after":151,"in_training_data":false}],"short_url":null}