fast-agent
★ 3.8k
vs
semble
★ 4.5k
fast-agent vs semble
fast-agent: fast-agent is a CLI-first framework for building and interacting with sophisticated multimodal AI agents and workflows. It offers comprehensive support for various LLM providers, structured outputs, and vision, with unique features like MCP Feature support and live streaming responses to the terminal.; semble: Semble is a high-performance code search library designed for AI agents, providing instant access to precise code snippets. It offers significantly faster indexing and querying compared to transformer models, achieving 99% of their retrieval quality while running entirely on CPU without external dependencies.
01
TL;DR
Choose fast-agent if…Rapid development and testing of sophisticated multimodal AI agents and workflows.
Choose semble if…Enhancing AI agents (e.g., Claude Code, Cursor, Codex) with fast and accurate code search capabilities
02
Side-by-Side Comparison
03
Features
fast-agent01Sophisticated multimodal Agent and Workflow creation.
02Comprehensive LLM provider support (e.g., Anthropic, OpenAI, Google, Ollama).
03Structured outputs, PDF, and Vision support.
04CLI-first with interactive terminal UI (TUI-style) and live streaming responses.
05Advanced agentic workflows like Chain, Parallel, MAKER, and Agents As Tools.
semble01Fast performance on CPU (indexes in ~250ms, queries in ~1.5ms)
02High accuracy (NDCG@10 of 0.854), comparable to transformer models
03Supports indexing local paths and remote Git repositories
04Functions as an MCP server for various AI agents
05Zero setup, no API keys, GPU, or external services required
04
Use Cases
fast-agent↳Rapid development and testing of sophisticated multimodal AI agents and workflows.
↳Diagnosing and tuning agent applications, including those requiring human input.
↳Implementing advanced agentic patterns for error reduction or complex task decomposition.
semble↳Enhancing AI agents (e.g., Claude Code, Cursor, Codex) with fast and accurate code search capabilities
↳Searching local or remote codebases for specific code snippets based on natural language or code queries
↳Finding semantically similar code sections related to a given file path and line number
05
Best For
fast-agentTrendingMulti-AgentDev Tooling
sembleCode AssistantRAG / Knowledge Base
FAQ
FAQ
What is the difference between fast-agent and semble?
Both fast-agent and semble are in the Dev Tooling category. fast-agent has 3.8k stars, while semble has 4.5k stars.
Which is better, fast-agent or semble?
The best choice depends on your use case. Choose fast-agent if Rapid development and testing of sophisticated multimodal AI agents and workflows., and semble if Enhancing AI agents (e.g., Claude Code, Cursor, Codex) with fast and accurate code search capabilities.
Is fast-agent free or open source?
Yes, fast-agent is open source on GitHub (Apache-2.0).
Is semble free or open source?
Yes, semble is open source on GitHub (MIT).
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