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
Evaluation Verdict

Gemini 3.8 Flash is the ultimate high-throughput coding workhorse, delivering 68.4% SWE-bench Verified at 1/20th the cost of heavyweight frontier models ($0.15/M input).

Google: Gemini 3.8 Flash Benchmarks & Agentic Accuracy

Verified primary research & developer preference metrics

Primary Sources Verified
SWE-bench Verified
68.4%
Thinking (Low)Google DeepMind Technical Report ↗
LiveCodeBench
53.8%
Thinking (Low)LiveCodeBench Leaderboard ↗
LMSYS Coding Elo
1380Elo
Coding ArenaLMSYS Arena ↗
AIME 2024 / 2025
84%
ThinkingGoogle DeepMind Technical Report ↗
Pricing ($ / 1M tokens)
$0.15/ $0.6
$0.0375 cached readStandard API Pricing

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

Tier 3: High-Throughput Subagent EngineRole: Coder Subagent

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.

Git Worktree Isolation Advantage:

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

Field 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
Benchmark Reality Check

What the benchmark tests: Tests high-speed multimodal retrieval, instruction following, and rapid code synthesis.

Production caveat: Best deployed in Swarm as a Finder subagent to map files and search symbols, reserving Claude 3.7 or o3 for diff writing.

Primary Sources & Methodology Citations

Head-to-Head Frontier Comparisons: Google: Gemini 3.8 Flash vs Rivals

Standardized, side-by-side benchmark & economics comparison against peer models

Flagship Comparative Matrix
ModelRole / TierSWE-benchLiveCodeBenchLMSYS EloAIMEInput / Output
Google: Gemini 3.8 FlashOpenRouterCurrent
Tier 3: High-Throughput Subagent Engine68.4%53.8%138084%$0.15 / $0.6
Tier 3: Refined Open Subagent56.2%52%136074.5%$0.3 / $0.9
Tier 3: World-Record Throughput Reflex50%43%——$0.1 / $0.4
Tier 3: Rapid Transpiler Subagent48%41.5%1270—$0.08 / $0.32
Tier 3: Extreme-Throughput Reflex Subagent52%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
  • Audio input
  • File input
  • Image input
  • Text input
  • Video input
  • Text output
  • Reasoning
  • Tools
  • Structured output
  • JSON

Run Google: Gemini 3.8 Flash in Swarm

Verified CLI workflow & multi-agent architecture

Quickstart Guide →
bash — swarm run
$swarm ctl model set --provider openrouter --model openrouter/google/gemini-3.8-flash

# Or switch interactively inside the terminal TUI:

>/models

Subagent 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.
← All OpenRouter models

Public catalog snapshot. Catalog availability is not a real-time provider status or an access guarantee.