DeepSeek · Shipped
DeepSeek-V4-Pro release date
What we forecast
First forecast on Aug 7, 2026: Aug 18, 2026. Last forecast before launch, on Aug 11, 2026: Aug 18, 2026. It shipped 6 days before that date.
Specs, benchmarks and changelog are on the DeepSeek-V4-Pro model card at TPS.
Released
Aug 12, 2026
A new stage of a model that already shipped, so it does not count toward DeepSeek’s release cadence.
What we know
Large-scale mixture-of-experts model. Context window 1048576 tokens.
Spec
- Params
- Not stated
- Active
- Not stated
- Context
- 1048576
- Weights
- MIT
- Modality
- text, code
- Codename
- Not stated
Every claim
8 from 6 sources- DeepSeek API UpdatesFrom the labNov 5
DeepSeek's changelog dated 2026-04-24 announces V4-Pro and V4-Flash on the API under the deepseek-v4-pro model name.
- DeepSeek API UpdatesFrom the labSep 1
GA release of DeepSeek-V4-Pro rolled out on APP, Web, and API with enhanced agent capabilities.
- Simon WillisonPressAug 28
Anil Madhavapeddy used DeepSeek V4 Pro for security research involving automated vulnerability detection in OCaml projects.
- OpenRouter catalogSpotted in the wildAug 12
DeepSeek V4 Pro general availability release observed on OpenRouter API.
- OpenRouter catalogSpotted in the wildAug 12
DeepSeek V4 Pro became available on OpenRouter on August 13, 2026, as a GA release with 1M token context.
- KenshiRepostJul 30
DeepSeek V4 has reportedly been delayed until mid-August. The final release is expected to be even more capable than the limited beta checkpoints.
- DeFAI ScopeInsiderJul 29
The official version of DeepSeek V4 (V4 GA) may be postponed until mid-August. DeepSeek is about to launch closed testing for its self-developed Harness tool. Approximately 1 to 2 weeks after closed testing ends, V4 GA is expected to open, with a possible release window between August 10 and 20.
- AiBattleInsiderJul 29
Supposedly from the DeepSeek Harness Team: "Someone in the main group said Boss Cui promised, 'If it isn't released on August 10, I'll stake my head on it.'", "I never said that". There were some rumors that beta testing for the harness will begin this week.