OpenRouter model
Google: Gemini 3.8 Flash
Gemini 3.8 Flash is Google's most intelligent Flash model with significant gains from 3.7 Flash across software engineering, agentic tasks, and multi-step reasoning.
- Provider
- OpenRouter
- Availability
- Available
- Model ID
- google/gemini-3.8-flash
- Snapshot
- 2026-10-07
Google: Gemini 3.8 Flash Benchmarks & Agentic Accuracy
Verified primary research & developer preference metrics
What This Means in Real Software Development
- Executes at ~160 tokens per second, cutting multi-turn agent response latency from 30 seconds down to 4 seconds.
- Scores 68.4% on SWE-bench Verified with low thinking, trailing top frontier models by under 2% while costing 95% less.
- Huge 1M context window enables ingesting entire repository schemas, dependency trees, and build logs simultaneously without middle-context truncation.
- Extremely economical for parallel Swarm subagents: launching 5 parallel worktree coders costs pennies.
Swarm Multi-Agent Topology
Best Paired With: Claude 3.7 Sonnet as Lead Primary Planner
Because Gemini 3.8 Flash is 3x faster and 20x cheaper than frontier pro models, it is the ideal engine for parallel Coder and Finder workers running concurrently inside separate Git worktrees.
Swarms zero-lock worktree architecture allows running 4x or 8x Gemini 3.8 Flash subagents simultaneously without merge conflicts or file contention.
What Developers & Practitioners Are Saying
Real-world field observations, production strengths, and developer consensus
"The ultimate high-speed utility engine in modern AI development. Featuring a 1M token window, it is the community's go-to choice for massive repository grep, search triage, and real-time validation."
Verified Real-World Strengths
- Rapid throughput with sub-second time-to-first-token
- Unbeatable economics ($0.15/M input, $0.60/M output, $0.0375/M cached read)
- High recall across 1M+ token contexts without hallucinating file locations
Production Caveats & Gaps
- SWE-bench score (46.2%) trails frontier reasoning models on deep logic puzzles
- Can occasionally omit edge-case error handling in generated code snippets
Primary Sources & Methodology Citations
- Gemini Technical Specifications & Flash Evaluations — Google DeepMind (2026)
Head-to-Head Frontier Comparisons: Google: Gemini 3.8 Flash vs Rivals
Standardized, side-by-side benchmark & economics comparison against peer models
| Model | Role / Tier | SWE-bench | LiveCodeBench | LMSYS Elo | AIME | Input / Output |
|---|---|---|---|---|---|---|
Google: Gemini 3.8 FlashOpenRouterCurrent | Tier 3: High-Throughput Subagent Engine | 68.4% | 53.8% | 1380 | 84% | $0.15 / $0.6 |
DeepSeek V4.1 FlashDeepSeek Compare Google: Gemini 3.8 Flash vs DeepSeek V4.1 Flash → | Tier 3: Refined Open Subagent | 56.2% | 52% | 1360 | 74.5% | $0.3 / $0.9 |
Celeris-1Independent Compare Google: Gemini 3.8 Flash vs Celeris-1 → | Tier 3: World-Record Throughput Reflex | 50% | 43% | — | — | $0.1 / $0.4 |
Muse GlimmerMeta Compare Google: Gemini 3.8 Flash vs Muse Glimmer → | Tier 3: Rapid Transpiler Subagent | 48% | 41.5% | 1270 | — | $0.08 / $0.32 |
Gemini 3.5 Flash-LiteGoogle Compare Google: Gemini 3.8 Flash vs Gemini 3.5 Flash-Lite → | Tier 3: Extreme-Throughput Reflex Subagent | 52% | 45% | 1295 | — | $0.075 / $0.3 |
Google: Gemini 3.8 Flash model overview
Google: Gemini 3.8 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
- low · medium · high
- Availability status
- Available
- Catalog ID
- openrouter/google/gemini-3.8-flash
Run Google: Gemini 3.8 Flash in Swarm
Verified CLI workflow & multi-agent architecture
swarm ctl model set --provider openrouter --model openrouter/google/gemini-3.8-flash# Or switch interactively inside the terminal TUI:
/modelsSubagent Role Matrix
Assign Google: Gemini 3.8 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.