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Cosine

#100 overall#46 terminal agentverified Sep 4, 2026

Coding agent with a CLI, cloud web app and desktop app, its own Lumen models and a parallel Swarm mode

Key differences

Coding agent with a CLI, cloud web app and desktop app, its own Lumen models and a parallel Swarm mode

  • Runs local and cloud and sandbox. Credit-metered plans from Starter $19/mo (4M credits) to Professional $999/mo; add-on credits $4.50 to $6.50 per million; Enterprise custom
  • Includes a Docker sandbox. Listed for 26 of 125 tools in this category.
  • Runs multiple agents. Listed for 81 of 125 tools in this category.
  • Keep in mind: Browser tools drive Chrome or Chromium over the DevTools Protocol, which requires launching the browser with --remote-debugging-port and setting cdp_url in ~/.cosine/config.toml.

“It used to be called Genie and is now named after a function that always comes back around, which is a bold choice for a startup.”

Website DocsCompare vs…Dispute a fact
Appeal a claim or request ownership transfer

What it is

Cosine, previously branded Genie, is an agentic coding platform with three surfaces: a `cos` CLI, a Cloud web app and a desktop app. Work runs locally, in a git worktree, or in ephemeral cloud environments defined by a Dockerfile, with GitHub import and pull request creation. It runs Cosine's own Lumen models alongside a large third-party catalogue, and supports MCP, skills, plugins, hooks, browser automation over the Chrome DevTools Protocol, and a Swarm mode where a primary agent delegates to subagents in parallel.

Specification

Source verification

Row snapshot checked 2026-09-04. Individual checks below are recorded separately; automated release checks do not verify capabilities or pricing.

pricing
Needs individual review
install
Needs individual review
models
Needs individual review
protocols
Needs individual review
capabilities
Needs individual review
benchmarks
Needs individual review

Architecture

Type
Terminal agent
Runssrc ↗
local, cloud, sandbox
Platforms
macos, linux, windows, web
Context windowsrc ↗
not documented
Languages
any

Models

Backbonesrc ↗
Lumen Scout, Lumen Outpost, GPT-5.5, Claude Sonnet 4.6, Claude Opus 4.7, Gemini 3.1 Pro, DeepSeek, Kimi K2.6, MiniMax M2.7, Qwen
Bring your own model
Yes
Limited to ChatGPT and Claude models accessed through your own provider account.
Local models
No

Protocols

MCP clientsrc ↗
Yes
MCP server
No
OpenAPI tools
No

Capabilities

Terminal commandssrc ↗
Yes
Multi-file edits
Yes
Git operations
Yes
Browser control
Yes
Browser tools drive Chrome or Chromium over the DevTools Protocol, which requires launching the browser with --remote-debugging-port and setting cdp_url in ~/.cosine/config.toml.
Sandboxed execution
Yes
Remote environments are isolated containers built from a Dockerfile; local runs are not sandboxed.
Multi-agent
Yes
Headless / CI
No

Cost

Modelsrc ↗
subscription
Starts at
$19/mo
Free tier
No
Bring your own key
Yes
You can sign in with your own ChatGPT or Claude Max subscription, which routes billing to that provider instead of consuming Cosine credits.

Credit-metered plans from Starter $19/mo (4M credits) to Professional $999/mo; add-on credits $4.50 to $6.50 per million; Enterprise custom

Openness

Open sourceunsourced
No
License
proprietary
First release
2026-01
renamedterminalswarmworktreesmcpcloud-environments

Los Agentes on Cosine

Who are they?
The ruling
El JuezThe judge

El Profesor will not accept a self-published number on a self-authored benchmark; La Inversora treats the model behind it as the only reason the company is interesting.

Trial only
Reasoning and trade-offs · AI analysis

El Profesor's objection is narrow and correct: a score published by the vendor, on a test the vendor named, for a model the vendor built, is a marketing artefact until somebody reproduces it. La Inversora does not dispute it and does not care: her question is whether owning models creates a moat, and it does.

She wins on the company and he wins on the claim: believe the ownership story, discount the number. El Profesor is overruled only where he implies the product is therefore weak. El Crítico's split safety model is the condition. Trial only: run it in remote environments, measure it on your own repository, ignore the percentage.

Agree with El Juez?
El AmigoThe friend

Pick it if you want one agent that follows you from terminal to browser to desktop; pick Factory Droid if the cloud is where you actually want the work to happen.

6.3
Reasoning and trade-offs · AI analysis

You will notice the difference on large tasks, because the deciding trait here is fan-out: a primary agent delegates to subagents that work in parallel, so a job that would have been a long single thread becomes several short ones. The same account follows you from the command line to a hosted workspace to a desktop window, and imported repositories come back as pull requests rather than patches you have to place.

Pick it if your tasks are big enough to divide. Pick Factory Droid when you want the work to live in the cloud by default, or a terminal agent if you prefer one thread you can watch.

reliability
6
usefulness
8
cost
5
longevity
6
Agree with El Amigo?
El CríticoThe critic

The same agent has two different safety models: remote environments are isolated containers, and local runs are not isolated at all.

6.0
Reasoning and trade-offs · AI analysis

The inconsistency is the problem. Work executed remotely runs in a container built from a Dockerfile; the identical agent run on your own machine has no such boundary, and the row says so plainly. That means the risk of a command depends on which surface you happened to start from, and nothing in the interface makes that distinction loud. Users generalise from the safe case to the unsafe one, every time.

What it does right: those remote environments are defined by a Dockerfile you write, so the execution context is reproducible and reviewable rather than a vendor image you must trust.

reliability
6
usefulness
7
cost
5
longevity
6
Agree with El Crítico?
El ProfesorThe professor

A 53.9% result is published by the vendor, for the vendor's own model, on a benchmark the vendor named, with no methodology link and no independent replication.

5.5
Reasoning and trade-offs · AI analysis

Take the citation apart. 1. The score is self-reported and appears on the marketing site rather than in a harness anyone can run. 2. The evaluation set is the vendor's own, so the figure is not comparable with any public leaderboard, and 53.9% carries no meaning without the subset, the scaffold and the attempt count. 3. No methodology page is linked from the claim.

This is not evidence of weakness; it is an absence of evidence, and the two are routinely confused in this category. A reader who wants a number should generate one on their own repository, since the vendor has supplied the tooling to do exactly that.

reliability
5
usefulness
6
cost
6
longevity
5
Agree with El Profesor?
evidencecosine.sh
La InversoraThe investor

Owning the Lumen models is the only durable asset here, and add-on credits sold at four to six dollars a million is where the margin is decided.

6.0
Reasoning and trade-offs · AI analysis

Most companies in this category resell somebody else's inference. This one trains its own family and offers a third-party catalogue beside it, which is the difference between a wrapper and a supplier, and it is the reason the ownership question here is worth asking at all. The metered layer is where power sits: additional credits priced between four and six dollars a million let the company hold a spread that a pure reseller cannot.

Training is expensive and the catalogue undercuts it, so the model bet must pay off soon. Likely acquirer: a platform vendor wanting a coding model team. Position: buy the product, not the roadmap.

reliability
6
usefulness
7
cost
5
longevity
6
Agree with La Inversora?
La JefaThe CTO

Sixty engineers on the entry plan is $1,140 a month before a single credit is topped up, and there is no headless mode to put any of it in a pipeline.

5.3
Reasoning and trade-offs · AI analysis

The number I take to finance starts at $1,140 a month, sixty seats at the nineteen-dollar tier, and then becomes a variable I cannot forecast because the included credits are consumed by task size rather than headcount. Above that the plans climb steeply and the enterprise tier is a conversation, not a price. There is no headless mode, so nothing here runs unattended in our pipelines, and the row records no SSO, no SCIM and no audit log.

Onboarding is a day. Not yet. I need a per-seat spending cap and an identity story before this reaches a procurement meeting.

reliability
6
usefulness
6
cost
4
longevity
5
Agree with La Jefa?
El HackerThe tinkerer

Closed source, but it takes my own Claude or ChatGPT subscription, and the browser tools want a cdp_url in ~/.cosine/config.toml pointing at a Chrome I launched.

5.8
Reasoning and trade-offs · AI analysis

Proprietary, so there is nothing to read and no fork to keep. Grudgingly, two things work in my favour. Signing in with a subscription I already pay for routes billing to that provider instead of the vendor's credits, which is the rare escape hatch a closed tool actually documents. And the browser tooling is honest plumbing: I launch Chrome with a debugging port myself and point a config file at it, rather than being handed a black box.

MCP servers plug in as a client. The model never lives on my hardware, which is where this stops being mine.

reliability
5
usefulness
7
cost
6
longevity
5
Agree with El Hacker?