Cognition AI Blog
cognition.ai/blog
Introducing SWE-grep and SWE-grep-mini: RL for Multi-Turn, Fast Context Retrieval
We trained SWE-grep and SWE-grep-mini, fast agentic models specialized in highly parallel context retrieval. They match the retrieval capabilities of frontier coding models, while taking an order of magnitude less time. Available now in Windsurf’s new Fast Context subagent, and our new SWE-grep demo playground!
Announcing Devin Agent Preview with Sonnet 4.5
Today we're releasing Claude Sonnet 4.5 in Devin, alongside our new Devin Agent Preview that's over 2x faster and 12% better on our Jr. Developer Evals.
Rebuilding Devin for Claude Sonnet 4.5: Lessons and Challenges
We rebuilt Devin for Claude Sonnet 4.5. The new version is 2x faster, 12% better on our Junior Developer Evals, and it's available now in Agent Preview. For users who prefer the old Devin, that remains available.
Funding, growth, and the next frontier of AI coding agents
Cognition has raised over $400M at a $10.2B post-money valuation led by Founders Fund. Other existing investors are similarly doubling down including Lux Capital and 8VC (who jointly led our previous round), Neo, Elad Gil, Definition Capital, and Swish VC. We’re also joined by new investors including Bain Capital Ventures and D1 Capital.
Build Your Own AI Data Analyst
Our #analytics Slack channel looks completely different than it did a year ago. Like most companies, we used to struggle with analytics. Even seemingly simple questions like "Why is enterprise plan revenue spiking for this cohort?" led to ping chains of doom. Getting answers often took days or weeks. Now, it takes minutes. What changed? We trained our own 24/7 on-demand data scientist.
Devin's MCP Marketplace
You can now connect your favorite MCP servers to Devin.
Cognition’s acquisition of Windsurf
Cognition has signed a definitive agreement to acquire Windsurf, the agentic IDE.
Coding Agents 101: The Art of Actually Getting Things Done
The year is 2025. Coding agents aren't magic, but they're about the closest thing we have. We've noticed some engineers, in particular at the senior-to-staff level, finding success faster than others. Here we share some top lessons sourced from the experience of our customers and ourselves.
Blockdiff: How we built our own file format for VM disk snapshots
How we built blockdiff, an open-source tool for rapid block-level diffs and snapshots of VM disks.
Don’t Build Multi-Agents
Frameworks for LLM Agents have been surprisingly disappointing. I want to offer some principles for building agents based on our own trial & error, and explain why some tempting ideas are actually quite bad in practice.
The DeepWiki MCP Server
The DeepWiki MCP server is here. Get codebase context and answers about any public GitHub repository in seconds.
Devin 2.1
We’re announcing some major changes in Devin 2.1. Devin now reports its confidence that it can complete tasks using 🟢 🟡 🔴 and is more likely to succeed in large codebases with better codebase context 🧠
Kevin-32B: Multi-Turn RL for Writing CUDA Kernels
We explore reinforcement learning in a multi-turn setting, using intermediate feedback from the environment, and masking model thoughts to avoid exploding context over multiple turns.
DeepWiki: AI docs for any repo
Turn any public GitHub repo into up-to-date documentation you can talk to, for free.
Devin 2.0
Introducing an agent-native IDE experience and a new Core plan starting at $20.