DeepSeek-V4
v20260424-previewDeepSeek
DeepSeek's preview flagship family: V4-Pro (1.6T total / 49B active MoE, the largest open-weight release ever) and V4-Flash (284B/13B). 1M-token context with up to 384K output, built on manifold-constrained Hyper Connections and Constrained Sparse Attention. MIT license. Vendor benchmark claims await broad independent verification.
Trust Vector Analysis
Dimension Breakdown
🚀Performance & Reliability+
Largest open-weight release ever (V4-Pro: 1.6T total / 49B active). Vendor benchmarks are impressive but this is a preview: score confidence is medium until independent verification matures. V4-Flash (284B/13B) offers a much cheaper deployment point.
Vendor-reported coding benchmarks; medium confidence pending broad independent verification of preview-release claims
Vendor-reported reasoning benchmarks; medium confidence until third-party evaluations of the preview mature
Community leaderboard positions and vendor benchmarks for a preview release
Repeated-prompt testing and community preview feedback
Median latency for API requests with standard prompt sizes from independent benchmarking
95th percentile response time across diverse workloads from independent benchmarking
Official specification from provider
Status-page history since the 2026-04-24 launch
🛡️Security+
Security posture mirrors V3.2 but with thinner preview-stage red-team coverage. Open weights shift safety responsibility to deployers who fine-tune or self-host.
Testing against OWASP LLM01 prompt injection patterns; limited preview-stage coverage
Adversarial prompt testing; assessment accounts for open-weight modifiability
Analysis of privacy policy plus self-hosting option for full data isolation
Safety testing across harmful content categories on default weights
Review of API security features and transport guarantees
🔒Privacy & Compliance+
Same split as all DeepSeek releases: the first-party API is China-hosted with China-jurisdiction residency and no Western certifications, while self-hosting or Western third-party hosting avoids those concerns. V4-Pro's 1.6T size makes self-hosting far harder than V4-Flash.
Review of privacy policy and hosting options; China-jurisdiction caveat applies only to the first-party API
Analysis of privacy policy and data usage terms for the hosted API
Review of terms of service; retention is deployment-dependent for open-weight models
Review of data protection capabilities and customer responsibilities
Verification of certifications for the first-party platform; third-party hosts inherit their own certifications
Review of data handling across first-party API, third-party hosts, and self-hosting
👁️Trust & Transparency+
Architectural novelty (manifold-constrained Hyper Connections, Constrained Sparse Attention) is disclosed, but the preview lacks the full technical report and independent benchmark replication DeepSeek usually delivers. Treat vendor claims with medium confidence.
Evaluation of reasoning transparency and trace accessibility
Limited factual QA testing during the preview period
Preliminary bias probing; formal evaluations pending
Qualitative assessment of confidence expression in outputs
Review of preview documentation completeness against DeepSeek's historical technical-report standard
Review of public disclosures about training data
Analysis of built-in safety mechanisms in default weights
⚙️Operational Excellence+
Aggressive pricing (V4-Pro $0.435/$0.87, V4-Flash $0.14/$0.28 per 1M) and MIT licensing, but the short legacy-endpoint deprecation window (2026-07-24) and preview status demand migration agility. V4-Pro self-hosting is feasible only for well-resourced organizations.
Review of API design, consistency, and feature completeness
Review of SDK compatibility and inference-framework support
Review of deprecation timelines and migration windows
Review of monitoring tools across deployment options
Assessment of documentation, community, and support responsiveness
Analysis of third-party hosting availability six weeks post-release
Review of licensing terms and restrictions
- +Largest open-weight release ever: V4-Pro at 1.6T total / 49B active parameters under MIT license
- +1M-token context window with up to 384K output tokens
- +Novel architecture: manifold-constrained Hyper Connections and Constrained Sparse Attention
- +Aggressive pricing: V4-Pro $0.435/$0.87 and V4-Flash $0.14/$0.28 per 1M tokens ($0.0028 cache hits on Flash)
- +V4-Flash (284B/13B) offers a practical self-hosting and high-volume deployment point
- +Inherits DeepSeek's frontier reasoning lineage from V3.2/Speciale
- !Preview status: behavior, pricing, and endpoints may change; vendor benchmark claims not yet broadly independently verified
- !First-party API is China-hosted: China-jurisdiction data residency and no SOC 2/HIPAA/FedRAMP (self-hosting or Western hosts avoid this)
- !V4-Pro's 1.6T footprint makes self-hosting impractical for all but the largest organizations
- !Short migration window: legacy deepseek-chat/deepseek-reasoner endpoints deprecate 2026-07-24
- !Text-only: no native vision or audio
- !No enterprise SLA or dedicated support on the first-party platform
- !Full technical report not yet published for the preview
Use Case Ratings
code generation
Vendor-reported state-of-the-art open-model coding; 1M context fits entire large repositories. Preview status warrants validation on your own tasks.
customer support
V4-Flash is a strong cheap option for high-volume support with aggressive cache-hit pricing.
content creation
Up to 384K output enables book-length single-pass drafts; prose quality solid but not best-in-class.
data analysis
1M context plus strong reasoning makes whole-dataset and multi-document analysis practical at open-model prices.
research assistant
1M-token context ingests entire literature corpora; frontier reasoning lineage from V3.2-Speciale.
legal compliance
China-hosted first-party API and preview status are both disqualifying for most regulated legal work; self-hosting V4-Flash is the viable path.
healthcare
No HIPAA path on the first-party API; preview status adds change risk. Only self-hosted compliant deployments are viable.
financial analysis
Excellent quantitative reasoning over very long filings at low cost; verify vendor claims and plan data residency for regulated use.
education
V4-Flash pricing is ideal for education-scale deployment with strong math reasoning.
creative writing
Massive output length helps novel-scale drafting; stylistic range remains behind dedicated creative leaders.