Bullet, a Y Combinator-backed coding agent that launched in public beta on August 13, 2026, is built around one idea: capable models do not need slow infrastructure. It ships as a free CLI and a macOS desktop app, and its makers claim it hits 95.8% on SWE-bench Verified while averaging 119 seconds per task.

Try It: Install Bullet in Your Shell

Bullet is usable today with no waitlist and no API key required to start. On macOS or Linux with Node 18+, install the CLI with npm install -g @trybullet/cli, then run it inside any repository. The agent auto-selects the model and reasoning depth per prompt, so you point it at a bug or feature and let it route the work. There is also a downloadable desktop app for macOS if you prefer a GUI over the terminal. Because it reads targeted files instead of embedding your whole codebase, first responses land fast on large repos.

What Happened

Built by Yale CS grads who previously worked at AppLovin and Citadel, Bullet went live as a Launch HN on August 13. The team reports a top-three placing on SWE-bench Verified at 95.8%, a self-reported figure that independent evaluators have not yet confirmed. Its architecture rests on three moves: routing simple tasks to fast models and escalating only hard ones, searching for the roughly 8% of a repository that matters rather than embedding all of it, and running independent tool calls in parallel while intercepting duplicate calls and stuck loops.

Why It Matters for Creators

Latency is the tax every AI coding session pays, and Bullet targets it directly. On its Product Hunt listing the team claims 30% to 60% faster runs than Claude Code and Codex on comparable tasks. If you build apps, sites, or automations with an agent in the loop, a router that sends trivial edits to a cheap fast model and reserves deep reasoning for the genuinely hard parts can cut both wait time and token spend. It slots in next to tools like Claude Code and the agentic coders we covered in Grok 4.6, competing on speed rather than raw model quality.

Key Details

Access: Free private beta, no API key needed to start.

Install: CLI via npm (@trybullet/cli), macOS or Linux, Node 18+. Desktop app for macOS.

Benchmark claim: 95.8% SWE-bench Verified (self-reported, top three), 119s per task average.

Version: 1.3.28 at launch.

Backing: Y Combinator (S26 batch).

What to Do Next

Install the CLI in a real project you know well and give it a scoped task you would normally hand to Claude Code or Codex, then compare wall-clock time and output quality on the same prompt. Treat the 95.8% SWE-bench number as a vendor claim until third-party results land. If the router and parallel execution hold up on your codebase, the speed gain compounds across a day of iteration.