Cosine review (2026): is it worth $19 a month?
Coding agent for terminal, desktop and cloud, with sovereign models
Black Friday: is there a Cosine sale?
Cosine report card
Weak · out of 4.0 · graded Nov 12, 2026
Best for a command-line coding agent with a desktop app
Cosine is a coding agent with a CLI, a Mac desktop app and cloud agents, on credits. Starter is $19 a month for 4M credits and there is no free plan or trial. Different models burn credits at different rates, and the billing docs list different tiers from the pricing page.
Who Cosine is for
- Fits if you want a coding agent in the terminal with a choice of models
- Works for a developer who wants cloud agents and an air-gapped option
Who Cosine is not for
- Skip it if you want to try it free, as the cheapest plan is $19 a month
- Watch out: credits are used at different multipliers by model, so 4M credits is a moving target
- Not for you if you want a Windows or Linux desktop app, as the desktop page offers Mac only
- Watch out: the pricing page lists three tiers, the billing docs six, with different names
Why Cosine gets a 1.8
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- BValue for moneyStarter is $19 a month for 4M credits, at the top of the cheaper quarter, but how far credits go depends on the model.
- FFree plan and trialNo free plan or trial on the pricing page.
- CFeaturesCLI, desktop, cloud agents, swarm mode and model choice, but pages disagree on the tiers.
- CEase of useNo store rating on record. The CLI is the main way in and the docs cover install and sign-in.
- CPlatforms and integrationsWeb, Mac, Windows and Linux with four integrations; the desktop page offers Mac only and there are no phone apps.
What these grades rest on. Graded from this listing, whose facts were read from Cosine's own pages on 12 November 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
Make Cosine? Put this grade on your site
Paste this where you want the badge. It links here and follows the grade if it changes. About badges
<a href="https://toolgpa.com/tools/cosine#review"><img src="https://toolgpa.com/badge/cosine.svg" alt="Cosine: 1.8 GPA on ToolGPA" width="196" height="56"></a>Where Cosine stands among AI agents
Cosine's GPA of 1.8 is higher than 11 of the 101 other AI agents we grade, and level with 14.
It stands best on value for money (B, above 74 of 101) and worst on free plan and trial (F, above 0).
Its paid plans start at $19 a month, against a middle price of $22.13 for the category: 12 of the 65 others that charge start lower.
On features, ease of use and platforms it scores 2.0 out of 4. 11 tools score higher and cost less.
Each grade against the category
Every bar is all 102 AI agents we grade, cut by the letter each got. Cosine’s own letter is outlined.
- BValue for moneyAbove 74 of 101, level with 16
- FFree plan and trialAbove 0 of 101, level with 22
- CFeaturesAbove 1 of 101, level with 67
- CEase of useAbove 14 of 101, level with 78
- CPlatforms and integrationsAbove 0 of 101, level with 19
Price against what you get
Each dot is one of 70 AI agents. Further left costs less, and higher up scores better on features, ease of use and platforms. Point at a dot to see which tool it is.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Keep Cosine, or make your own?
Keep it
To replace Cosine you would be making an AI agent, with the models and the safeguards behind it. That is not a weekend's work, with an AI app builder or without one.
That makes this kind of software worth paying for, not this one in particular: 76 of the 101 other AI agents grade higher. It costs $228 a year.
What you could not
- An AI agent, with the models and the safeguards behind it.
- Connections to other products, each kept working as those products change.
- Apps for macOS, Windows and Linux that stay in step with each other.
What this rests on. Cosine’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
What is Cosine?
Cosine is a UK-based AI lab that sells a coding agent through a command-line tool, a Mac desktop app and a cloud workspace, all drawing on one shared pool of credits. It also trains its own Lumen models and offers air-gapped and single-tenant deployments for regulated organizations. The agent can work with models from several providers as well as Lumen.
Worth knowing
- There is no free plan or free trial on the pricing page; the cheapest plan is $19 a month.
- Usage is billed in credits, and different models use them at different multipliers, so how far 4M credits goes depends on the model chosen.
- The pricing page lists three tiers, while the billing docs list six (Starter, Builder, Team, Scale, Professional and Enterprise) with different names for the $199 and $999 tiers.
- The desktop page offers a Mac download only; the CLI docs cover macOS (Apple Silicon only), Linux and Windows.
Key features
- CLI coding agent
- The cos command runs the agent in a terminal alongside your editor and tests. Every agent turn is saved as a lightweight git commit, so changes can be undone.
- Desktop app
- A native app for working on local project folders, with plan review, diffs, and built-in browser and terminal panels. The product page offers a Mac download.
- Cloud agents
- Tasks can run in remote workspaces, each session in an isolated microVM, so long jobs continue after your laptop is closed. The site says 20 or more agents can run in parallel.
- Swarm mode and memory
- An orchestrator can spawn child agents that work in parallel, and project conventions persist across sessions.
- Model choice
- The model list includes Cosine's own Lumen models along with models from OpenAI, Anthropic and Google, each with a credit multiplier.
- Sovereign and air-gapped deployment
- For regulated organizations the company offers fully air-gapped, managed single-tenant and public cloud options.
Cosine pricing
As of Nov 12, 2026, Cosine is a paid product, starting at $19 per month, including 4M credits.
- Starts at
- $19 per month, including 4M credits
- Free plan
- None
- Free trial
- None listed
| Plan | Price | What you get |
|---|---|---|
| Starter | $19per month, for 4M credits a month | For solo developers and side projects. Extra credits cost $6.50 per 1M. |
| Team | $199per month, for 47M credits a month | For growing teams. Extra credits cost $5.00 per 1M. The billing docs name this $199 tier Scale and list a $99 tier for 23M credits. |
| Enterprise | $999per month, for 240M credits a month | For highly regulated industries. Extra credits cost $4.50 per 1M. The pricing page also invites teams to ask about a more custom arrangement. |
Read from cosine.sh on Nov 12, 2026. Prices change, so confirm with Cosine before you buy.
Works with
Cosine alternatives
- Cosine vs Devin
Free plan · from $20/mo
- Cosine vs OpenHands
Free plan · from $500/mo
- Cosine vs Factory
Free plan · from $20/mo
- Cosine vs Jules
Free plan
- Cosine vs Amp
Free plan · from $20/mo
Common questions
Does Cosine have an Android app?
No Android app was listed when its pages were read on Nov 12, 2026. Cosine is listed for Web, macOS, Windows and Linux.
Does Cosine have an iPhone app?
No iPhone app was listed when its pages were read on Nov 12, 2026. Cosine is listed for Web, macOS, Windows and Linux.
Is Cosine open source?
Cosine is not described as open source on its own site, as read on Nov 12, 2026.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Nov 12, 2026.