AI tool comparison
Craft Agents vs Mercury Edit 2
Which one should you ship with? Here is the side-by-side panel verdict, pricing read, reviewer split, and community vote comparison.
Developer Tools
Craft Agents
Open-source desktop app for multi-session Claude agents with MCP & APIs
75%
Panel ship
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Community
Free
Entry
Craft Agents OSS is an open-source desktop application built on Anthropic's Claude Agent SDK, offering a polished GUI for managing multiple AI agent sessions simultaneously. Built by Luki Labs and released under Apache 2.0, it fills the gap between raw API access and the full Claude.ai web interface — giving developers and power users a native desktop experience with serious capability depth. The app supports three permission modes that make it genuinely useful for real work: Explore (read-only, safe for exploring codebases), Ask to Edit (approval-based, for supervised automation), and Auto (unrestricted, for trusted workflows). It connects to MCP servers, REST APIs from Google, Slack, and Microsoft, and local filesystems, with real-time streaming responses and full tool call visualization. A multi-session workflow with Todo → In Progress → Needs Review → Done status tracking makes it feel more like a project management system than a chat interface. Built on Electron + React with encrypted credential storage and a headless server mode, Craft Agents is architecturally serious. It's available as a one-line installer for macOS, Linux, and Windows. With the Claude Agent SDK gaining traction, this is the first polished desktop client that treats agents as long-running workflows rather than single-turn conversations.
Developer Tools
Mercury Edit 2
Diffusion LLM that predicts your next code edit in parallel — not word by word
75%
Panel ship
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Community
Paid
Entry
Mercury Edit 2 is the second-generation coding model from Inception Labs, built on a fundamentally different architecture than every major LLM you're used to: a diffusion language model. Rather than generating tokens one at a time in a left-to-right sequence, Mercury operates in parallel — refining a full draft across all positions simultaneously. The result is next-edit prediction that runs up to 10x faster than GPT-4o and Claude 3.5 Sonnet at equivalent quality, with latency that finally matches how fast a human developer types. The model is purpose-built for the "edit" step in agentic coding loops — where an agent needs to predict what change should happen at a given location in a codebase, not generate a full file from scratch. Mercury Edit 2 takes in a code context, a cursor position, and optionally a natural-language intent, and outputs the predicted edit. Benchmarks show it matching or exceeding autoregressive models on HumanEval and MBPP tasks while cutting time-to-first-token by 80%. Inception Labs was founded by researchers from Stanford, UCLA, Google DeepMind, and OpenAI who bet that diffusion would eventually outpace transformers for text the same way it overtook GANs for images. Mercury Edit 2 is the clearest signal yet that this thesis has legs. At $0.25/1M input and $0.75/1M output tokens, it's meaningfully cheaper than GPT-4o-class models — and the speed advantage makes it a natural fit for high-frequency agentic tasks.
Reviewer scorecard
“The three permission modes — Explore, Ask to Edit, Auto — is the right model for how I actually use agents. I want read-only exploration when I'm learning a codebase and auto mode when I'm in flow. That plus MCP server support makes this my new default agent UI.”
“The speed argument is real — I've integrated it into a Cursor-style flow and the round-trip latency for edits dropped to something that genuinely feels instantaneous. The architecture also means it's less prone to 'over-generating' — it just predicts the edit, not a rambling block of new code.”
“Electron desktop apps for AI agents have a graveyard of predecessors — most people end up in the terminal or the browser anyway. The Claude-only model dependency is also a real limitation; when Anthropic changes their SDK or pricing, the whole platform needs to adapt.”
“Diffusion LLMs have been 'about to beat transformers' for two years. Mercury Edit 2 is faster, sure — but for complex multi-file refactors it still struggles with global context. The benchmark cherry-picking on HumanEval is a red flag when most real coding tasks are messier than a LeetCode problem.”
“Agent session management as a first-class concept is where the whole category is heading. Craft Agents is early proof that the IDE model — multi-session, persistent, project-aware — is the right UX paradigm for AI agents, not the chat-box model we inherited from GPT-3 days.”
“This is the first credible sign that the transformer monoculture in language AI might actually break. If diffusion models hit parity on reasoning while maintaining 10x speed, the cost curve for agentic loops changes completely — and Inception Labs has a year head start on everyone else.”
“File attachments with automatic format conversion plus the Slack/Google API integrations mean I can finally have agents that work across my whole toolkit, not just the terminal. The one-line installer is the detail that will make this actually get adopted.”
“For code-to-design workflows where I'm iterating on UI components in tight loops, the latency improvement is huge. Faster edit prediction means the feedback cycle between idea and implementation collapses — and that changes the creative dynamic substantially.”
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