flue vs Prism: Features, Pricing & Which Is Better (2026)
A side-by-side comparison of flue and Prism — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.
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flue
Astro
Open-source TypeScript agent harness framework for building autonomous agents and AI workflows.
Key features
- Agent Harness: A programmable TypeScript harness giving any model sessions, tools, skills, instructions, and filesystem access.
- Autonomous Agents: Build agents that keep context across conversations and events while working toward a goal.
- Workflows: Run structured automations where your code guides agent reasoning from input to finished result.
- Secure Sandboxes: Give agents an isolated environment to use tools, modify files, and complete real work safely.
- Durable Execution: Agents preserve progress and recover through failures and restarts.
- Subagents and Tools: Delegate tasks to specialized subagents and give agents typed actions for APIs and data.
- MCP and Observability: Connect tools via Model Context Protocol and monitor agents with OpenTelemetry and Braintrust.
Best for
- Building Autonomous Agents: Create Claude Code or Codex-style agents that complete open-ended tasks independently.
- Structured Workflows: Automate multi-step processes where code controls the agent's reasoning path.
- Safe Tool Use: Run agents in a secure sandbox so they can take real actions without risk to your systems.
- Local or Hosted Deployment: Run agents from the CLI during development, then deploy to a hosted runtime.
- Tool Integration: Connect agents to authenticated services through MCP servers.
Prism
Prism
A native macOS AI workspace with multi-provider chat, hosted models, an MCP registry, and @-tools.
Key features
- Multi-Provider Chat: Use GPT-5.5, Claude Opus, Gemini, and local models and compare providers side by side in one workspace.
- Prism Hosted: Access frontier models for reasoning, coding, and long-context work without bringing your own API key.
- Quick AI: Summon any model from any macOS app without breaking your flow.
- MCP Registry and @-Tools: Curated MCP servers with saved credentials and @-mention tools for file, quiz, and flash-card flows inside the thread.
- Local Proxy: An OpenAI-compatible local proxy on paid plans routes external IDEs and CLIs like Claude Code through your configured models.
- Native macOS Design: A single SwiftUI window for chat, tools, and history built specifically for Mac.
Best for
- Comparing Models Side by Side: Test the same prompt across multiple providers and pick the best answer.
- Key-Free Frontier Access: Use top hosted models through Prism Hosted without managing your own API keys.
- In-App AI Anywhere: Trigger Quick AI from any Mac app to draft or answer without switching context.