Matter AI
Gravity Cloud Services, Inc. · Coding
MatterAI is a developer platform that combines fast AI inference across open-source models, two coding agents called Orbital and OrbCode, and automated pull request reviews.
About Matter AI
What Is MatterAI
MatterAI is a developer platform from Gravity Cloud Services. It bundles three products that share one account and one model catalog: an inference API, a pair of coding agents, and an automated code reviewer. If you already pay for a chat model and a separate code review tool, MatterAI is trying to cover that ground in one place and at a lower per-token cost.
The inference side resells access to open-source and third-party models like GLM 5.3, DeepSeek V4.1 Flash and Gemini 3.8 Flash through an OpenAI-compatible endpoint, with a 30 percent discount applied to every token. The agents come in two shapes. Orbital is a macOS desktop editor built as an alternative to Cursor, and OrbCode is an open-source terminal agent under the MIT license. The reviewer runs on your pull requests in GitHub, GitLab or Bitbucket and can open a fix of its own.
Two limits matter early. The platform's own Axon models and most of the agent experience are tied to a MatterAI account, so there is no offline mode. Orbital also ships for macOS first, with Windows and Linux still on the roadmap, so non-Mac users start with the CLI or the review bot instead of the editor.
Getting Started
- Create a MatterAI account and grab an API key from the dashboard
- Point any OpenAI-compatible client at the MatterAI endpoint, or browse the live model catalog to pick a model
- Install OrbCode with npm install -g @matterailab/orbcode, run orbcode login once, then launch it from a project folder
- Or download Orbital for macOS and sign in to use the desktop coding app
- Connect a repository so the review bot can comment on pull requests, and optionally let it open a fix pull request
Product Information
A quick look at Matter AI's pricing, supported platforms, and performance.
Best for
The users, tasks, and scenarios where this tool fits best.
Users
- Individual developers
- Engineering teams
- Cost-conscious builders
- Open-source contributors
Tasks
- Writing and refactoring code across a repo
- Reviewing a pull request
- Fixing a review finding
- Routing model calls by price
- Scanning dependencies
Scenarios
- You kick off a feature and want the terminal to do the first draft
- A pull request is large and the reviewer is busy
- Your inference bill keeps climbing
- You paste a screenshot of a failing dashboard
- A teammate is on a Mac and you are not
Key features
One Endpoint for Open-Source Models
MatterAI serves GLM 5.3, GLM 5.3 Flash, DeepSeek V4.1 Flash and Gemini 3.8 Flash from a single OpenAI-compatible API at api.matterai.so, with a 30 percent discount applied to every token. Because the surface matches the OpenAI format, you point an existing client or SDK at the new base URL and keep your code. Context windows run up to one million tokens, and cache reads are billed far below fresh input for repeated prompts.
Orbital Desktop Coding App
Orbital IDE is a macOS code editor built as a Cursor alternative, running on MatterAI's own Axon models hosted in US data centers. Tab completion predicts multi-line edits, CMD plus K turns a plain-English request into a shell or git command, and an agentic layer can search the web and fetch documentation mid-task. Plans scale from a free tier up to Ultra at 50 dollars a month, with review credits bundled in each tier.
OrbCode Terminal Agent
OrbCode is a standalone terminal agent, open-sourced under the MIT license, that shares the same agentic loop as its desktop sibling. Each tool call shows a formatted row with a live state and a result preview, file edits render as real diffs with red and green backgrounds, and read-only tools run freely while edits and commands prompt first. Dangerous commands can never be auto-approved, and a headless -p flag makes it scriptable for CI.
Context-Aware Pull Request Reviews
The reviewer reads more than the diff. An agent gathers caller, definition and dependency context before a second model writes the review, so it can catch design and logic problems a parser would miss. Every finding carries a confidence score to keep noise down, and on later commits the bot marks earlier issues as resolved with a reason attached.
Auto-Fix and Security Review
When the bot finds a real problem, it can generate a precise fix and open a fix pull request on an isolated branch for you to merge. Security analysis runs on every pull request as well, flagging issues like SQL injection and cross-site scripting and scanning dependencies for known vulnerabilities, then suggesting a version to upgrade to.
Team Analytics and Reviews
Beyond the bot, MatterAI tracks the pull request lifecycle so teams can see review response time, comments per line, merges and cycle time. It can also run AI reviews on your local changes before you commit, which turns the editor into the first reviewer rather than the last.
Pros and cons
Pros
- Serves several frontier open-source models from one OpenAI-compatible endpoint, so switching models means changing a URL and a model name
- Applies a 30 percent discount on every inference token and bundles extra plan credits, which lowers the effective cost of heavy agentic work
- Ships an MIT-licensed terminal agent with Claude-Code-style hooks, MCP servers and AGENTS.md memory, so scripts and habits carry over
- Reviews pull requests with real codebase context and a confidence score, which cuts the noise that makes automated reviews easy to ignore
- Opens auto-fix pull requests on isolated branches, so a suggested change is something you merge rather than something you apply by hand
- Adds dependency and vulnerability scanning to the same review pass, so security checks do not need a separate tool
Cons
- Orbital is macOS only for now, so Windows and Linux users have to start with the CLI or the review bot instead of the editor
- The agent experience and the platform's own Axon models are tied to a MatterAI account, so there is no fully offline path
- The free tier is meant for light use, and heavy agentic coding quickly pushes you onto a paid plan
- The plugin and skills catalogs are younger than the established Anthropic and OpenAI marketplaces, so third-party add-ons are thinner
Frequently asked questions
MatterAI is a developer platform that puts three tools under one account: an inference API for open-source and third-party models, two coding agents called Orbital and OrbCode, and an automated pull request reviewer. It comes from Gravity Cloud Services.
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