Sovereign inference — DeepSeek V4.1 Flash

Your sovereign, private DeepSeek V4.1 Flash

DeepSeek-V4.1-Flash is a multimodal Mixture-of-Experts model with 552B backbone parameters that natively processes images and text at up to 1M token context. Its Causal Encoder-Decoder architecture activates only 8B parameters during prefill and 16B during decode, cutting the KV cache footprint to roughly a quarter of DeepSeek-V4-Flash for cost-efficient agentic workloads. A reasoning model in the medium tier, served on ToothFairyAI's AU, EU and US endpoints — private by default, billed in US dollars per million tokens at the published rates below. No training on your data, no vendor lock-in.

AU · EU · US resident$0.42/1M input$1.51/1M output$0.01/1M cached input1049K context

How DeepSeek V4.1 Flash compares

Independent intelligence index for DeepSeek V4.1 Flash against every peer in the Medium tier (and the tier above where needed) — same source, same tests.

DeepSeek V4.1 Flash (this model)39.5DeepSeek V4.1 Flash 1017 Ultra-fast45.1GLM 5.3 Flash Priority41.8DeepSeek V4 Flash Official34.3Minimax 329.2GPT OSS 20B9.0Qwen 3 32B7.3

Latency — end-to-end seconds for a 500-token answer

DeepSeek V4.1 Flash11.7sDeepSeek V4.1 Flash 1017 Ultra-fast13.0sGLM 5.3 Flash Priority58.6sDeepSeek V4 Flash Official12.5sMinimax 322.5sGPT OSS 20B14.7sQwen 3 32B7.2s

Capability indexes

Domain-weighted agentic performance for DeepSeek V4.1 Flash.

Finance & AccountingStrategy & OpsLegalHealthcare & MedicalEngineeringEconomics

Capability index vs medium peers

13.126.239.452.545.051.741.340.639.344.4DeepSeek V4.1 Flash48.352.546.445.250.5DeepSeek V4.1 Flash 1017 Ultra-fast42.045.139.944.843.848.9GLM 5.3 Flash Priority37.543.137.735.434.940.3DeepSeek V4 Flash Official30.125.031.529.731.243.7Minimax 37.34.87.36.611.711.3GPT OSS 20B
Finance & AccountingStrategy & OpsLegalHealthcare & MedicalEngineeringEconomics

The evaluations behind the index

Independent benchmark results for DeepSeek V4.1 Flash — Elo scores as published; pass rates shown as percentages.

AutomationBench-AA68.9 %Terminal-Bench 4.026.8 %SciCode51.9 %Humanity's Last Exam39.2 %GDP.pdf12.8 %CritPt14.3 %AA-LCR (long context)84.0 %

Per-evaluation economics

EvaluationScoreTime / taskOutput tokens / task
AA-Briefcase1431.799.1 min170690
GDPval-AA1600.006.2 min116108
AutomationBench-AA68.9%4.6 min87009
Terminal-Bench 4.026.8%15.2 min285252
SciCode51.9%0.5 min9753
Humanity's Last Exam39.2%1.8 min34685
GDP.pdf12.8%0.8 min15040
CritPt14.3%5.9 min111624
AA-Omniscience-530.0%0.4 min8127
AA-LCR (long context)84.0%0.2 min3097

Run DeepSeek V4.1 Flash privately

One key, one endpoint, three jurisdictions.

  • Size tierMedium
  • Serving routeStandard
  • Input rate$0.42/1M
  • Output rate$1.51/1M
  • Cached input rate$0.01/1M
  • Context window1049K tokens
  • Max output16K tokens
  • ReasoningYes — emits thinking traces
  • Vision & video inputSupports image input
  • Tool callingSupported
  • Data residencyAU, EU and US endpoints — processing stays inside the region you call