OpenRouter model
DeepSeek: DeepSeek V4.1 Flash
DeepSeek V4.1 Flash is a sparse mixture-of-experts model from DeepSeek, and the first built on the company's Causal Encoder-Decoder (CED) architecture. It activates 8B parameters on input and 16B on...
- Provider
- OpenRouter
- Availability
- Available
- Model ID
- deepseek/deepseek-v4.1-flash
- Snapshot
- 2026-10-07
DeepSeek: DeepSeek V4.1 Flash Benchmarks & Agentic Accuracy
Verified primary research & developer preference metrics
What This Means in Real Software Development
- 56.2% SWE-bench Verified score demonstrates sharp improvements in multi-file bug diagnosis.
- Fast 90 TPS output speed keeps developer turnaround times low.
- 74.5% on AIME confirms strong deductive logic for complex algorithm problems.
- Available on Fireworks AI and OpenRouter with low latency.
Swarm Multi-Agent Topology
Best Paired With: Claude 3.7 Sonnet as Lead Planner
High throughput and low pricing make it optimal for Stage 2 implementation workers.
Dispatched into Swarm worktrees to execute and verify isolated test suites.
What Developers & Practitioners Are Saying
Real-world field observations, production strengths, and developer consensus
"Refined flash MoE architecture offering improved instruction following for high-throughput pipelines."
Verified Real-World Strengths
- Fast ~140 TPS execution
- Strong JSON tool-calling syntax fidelity
- Unbeatable economics for continuous integration agents
Production Caveats & Gaps
- Limited deep mathematical reasoning capabilities
Primary Sources & Methodology Citations
- DeepSeek V4.1 Flash Technical Release — DeepSeek AI (September 2025)
Head-to-Head Frontier Comparisons: DeepSeek: DeepSeek V4.1 Flash vs Rivals
Standardized, side-by-side benchmark & economics comparison against peer models
| Model | Role / Tier | SWE-bench | LiveCodeBench | LMSYS Elo | AIME | Input / Output |
|---|---|---|---|---|---|---|
DeepSeek: DeepSeek V4.1 FlashOpenRouterCurrent | Tier 3: Refined Open Subagent | 56.2% | 52% | 1360 | 74.5% | $0.3 / $0.9 |
Gemini 3.8 FlashGoogle Compare DeepSeek: DeepSeek V4.1 Flash vs Gemini 3.8 Flash → | Tier 3: High-Throughput Subagent Engine | 68.4% | 53.8% | 1380 | 84% | $0.15 / $0.6 |
Celeris-1Independent Compare DeepSeek: DeepSeek V4.1 Flash vs Celeris-1 → | Tier 3: World-Record Throughput Reflex | 50% | 43% | — | — | $0.1 / $0.4 |
Muse GlimmerMeta Compare DeepSeek: DeepSeek V4.1 Flash vs Muse Glimmer → | Tier 3: Rapid Transpiler Subagent | 48% | 41.5% | 1270 | — | $0.08 / $0.32 |
DeepSeek R1DeepSeek Compare DeepSeek: DeepSeek V4.1 Flash vs DeepSeek R1 → | Tier 2: Deep Algorithmic Specialist | 49.2% | 49.8% | 1360 | 79.8% | $0.55 / $2.19 |
DeepSeek: DeepSeek V4.1 Flash model overview
DeepSeek: DeepSeek V4.1 Flash is listed in the public Swarm catalog through OpenRouter. This page summarizes the verified catalog fields used by Swarm without claiming real-time access for every provider account.
- Provider
- OpenRouter
- Family
- OpenRouter
- Context window
- 1.05M tokens
- Thinking support
- off · low · high · max
- Availability status
- Available
- Catalog ID
- openrouter/deepseek/deepseek-v4.1-flash
Run DeepSeek: DeepSeek V4.1 Flash in Swarm
Verified CLI workflow & multi-agent architecture
swarm ctl model set --provider openrouter --model openrouter/deepseek/deepseek-v4.1-flash# Or switch interactively inside the terminal TUI:
/modelsSubagent Role Matrix
Assign DeepSeek: DeepSeek V4.1 Flash to specialized system roles in ~/.swarm/config.json:
- Primary / Planner: Orchestrates full task DAGs and multi-stage pipelines.
- Coder Subagent: Generates code and unit tests inside private Git worktrees.
- Finder Subagent: Performs read-only code search, symbol discovery, and mapping.
Public catalog snapshot. Catalog availability is not a real-time provider status or an access guarantee.