GitLab DuovsTrinity
Generated from the two spec rows. Green marks the better value where a spec has a clear direction. Everything else is just different.
GitLab Duo
GitLab · Agent harness
MCP
Panel
6.82 spec wins
- Reliability
- 6.7
- Usefulness
- 6.5
- Cost
- 5.8
- Longevity
- 8.0
“It has shipped a Security Analyst agent, so the robot now files the vulnerability the other robot wrote.”
Trinity
Ability AI · Agent harness
OSSMCP
Panel
7.24 spec wins
- Reliability
- 7.2
- Usefulness
- 7.5
- Cost
- 7.8
- Longevity
- 6.3
“Agents escalate their approvals to a human operator queue, which is a promotion nobody on the team applied for.”
Spec by spec
| Spec | GitLab Duo | Trinity |
|---|---|---|
| Architecture | ||
| Category | Agent harness | Agent harness |
| Runs | local, cloud | local, cloud, sandbox |
| Platforms | macos, linux, windows, web | macos, linux, web |
| Context window | not documented | not documented |
| Protocols | ||
| MCP client | Yes | No |
| MCP server | Yes | Yes |
| Capabilities | ||
| Runs terminal commands | Yes | Yes |
| Multi-file edits | Yes | YesFiles are changed by the Claude Code or Gemini agent Trinity runs inside each container, not by Trinity itself. |
| Git operations | Yes | YesAgent workspaces and state are versioned in Git, credentials are stored encrypted in the repository, and agents can be created from a GitHub template. |
| Browser control | No | No |
| Sandboxed execution | No | Yes |
| Multi-agent orchestration | Yes | Yes |
| Headless / CI mode | YesFlows started from the GitLab UI execute in GitLab CI/CD runners. | YesAgents run unattended on cron schedules and can be started through the REST API or Trinity's MCP tools; there is no dedicated CI action. |
| Models | ||
| Backbone | Anthropic Claude | Claude Opus, Claude Sonnet, Claude Haiku, Gemini |
| Bring your own model | YesOnly through the GitLab Duo Self-Hosted deployment on Self-Managed instances. | Yes |
| Local models | YesGitLab Self-Managed instances can run Duo against self-hosted models through a self-installed AI Gateway; GitLab.com uses GitLab-selected models. | No |
| Cost | ||
| Pricing model | seat | byok |
| Starts at | n/a | $0/mo |
| Free tier | No | Yes |
| Bring your own key | No | Yes |
| Openness | ||
| Open source | No | Yes |
| License | proprietary | Apache-2.0 |
| GitHub stars | n/a | 605 |
Which one would each critic pick
| Critic | GitLab Duo | Trinity | Pick |
|---|---|---|---|
| El Juez | — | — | not enough reviews |
| El Amigo | 7.0 | 7.3 | Trinity — Pick it when you want agents doing work overnight on a schedule; pick a session manager when you want to watch every step yourself. |
| El Crítico | 6.5 | 6.8 | Trinity — Credentials are stored encrypted in the repository, which means secrets live in version history, and version history is the one place you cannot delete from. |
| El Profesor | 7.0 | 7.3 | Trinity — A tamper-evident audit trail paired with a human approval queue means an unattended run produces both a record and a place where it must stop. |
| La Inversora | 8.0 | 7.0 | GitLab Duo — Bundling the entry tier into Premium and Ultimate is an attach-rate play, not a product launch: the AI is defending the subscription, not selling itself. |
| La Jefa | 7.3 | 6.8 | GitLab Duo — The add-on seats are quoted rather than listed, and Agent Platform usage draws down purchased Credits, so sixty developers is one number I cannot compute in advance. |
| El Hacker | 4.8 | 8.3 | Trinity — Apache-2.0, self-hosted with one script, and an MCP endpoint at /mcp exposing over ninety tools, so my own agent can drive the whole fleet. |
Picks are derived from each critic's own scores. Humans vote on matchups on the duels page.