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Side-by-side: what they do, what they cost, what Kai actually thinks. Pass up to 4 tools via ?tools=claude,chatgpt,gemini.
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Flux (Black Forest Labs)
A
OpenRouter
S
Claude Code
S
Manus
S
TaglineOpen weights + strong photorealism. The open-source answer.One API, every model. Pay-as-you-go, no subscriptions.Anthropic's CLI agent. Opus-powered, operates on your repo directly.Autonomous AI agent that actually finishes tasks.
CategoryImageDev PlatformCodingAgents
PricingAPI + open weights (Schnell is Apache 2.0)Pay per token — model-dependentPart of Claude Pro/Max/Team plansFree tier + $39-$199/mo
Best forDevelopers + power users who want control and privacy.Developers experimenting across models. Apps that want fallback logic.Developers who want an agent, not autocomplete. Large refactors, tests, docs.People who want to hand off tasks entirely — trip planning, research, spreadsheet building.
Strengths
  • Runs locally on a beefy GPU
  • Very photoreal
  • Best open-weight model
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
Weaknesses
  • Harder to use than hosted tools
  • Needs infra
  • Slight markup over direct API
  • Some provider features not exposed
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
Kai's verdictA-tier. S-tier if you self-host. The reason open-source image gen matters.S-tier for model-shopping. I use this for every prototype before committing.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.S-tier in the agent category. The first one I'd give to a non-technical friend.
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