DevinvsOna
Generated from the two spec rows. Green marks the better value where a spec has a clear direction. Everything else is just different.
Devin
Cognition · Autonomous SWE
#139MCP
Panel
5.33 spec wins
- Reliability
- 5.3
- Usefulness
- 5.8
- Cost
- 4.3
- Longevity
- 5.5
“Replaced ACUs with credits in April 2026, so now the meter runs in a unit you already understand.”
Ona
Ona (OpenAI) · Autonomous SWE
#31MCP
Panel
6.61 spec wins
- Reliability
- 6.7
- Usefulness
- 7.5
- Cost
- 5.0
- Longevity
- 7.3
“Automations fan a fleet of agents across your codebase on a schedule, so now the on-call rotation includes the robots.”
Spec by spec
| Spec | Devin | Ona |
|---|---|---|
| Architecture | ||
| Category | Autonomous SWE | Autonomous SWE |
| Runs | cloud, sandbox, local | cloud, sandbox |
| Platforms | web, macos, linux, windows | web, macos, linux, windows |
| Context window | not documented | not documented |
| Protocols | ||
| MCP client | Yes | Yes |
| MCP server | Yes | No |
| Capabilities | ||
| Runs terminal commands | Yes | Yes |
| Multi-file edits | Yes | Yes |
| Git operations | Yes | Yes |
| Browser control | YesCloud sessions ship a first-party interactive Browser tool alongside the shell and IDE, with saved browser profiles for authenticated sites (https://docs.devin.ai/work-with-devin/browser-auth). | No |
| Sandboxed execution | YesCloud sessions run on a dedicated Devin machine built from environment blueprints and snapshots, and the Devin CLI adds OS-level isolation locally (https://docs.devin.ai/cli/sandbox). | Yes |
| Multi-agent orchestration | Yes | YesAutomations run fleets of agents triggered by pull requests, schedules or webhooks. |
| Headless / CI mode | Yes | Yes |
| Models | ||
| Backbone | Undisclosed (Cognition-managed models) | OpenAI Codex |
| Bring your own model | NoA cross-provider model picker (`--model` / `/model` / config `agent.model`) selects between Anthropic, OpenAI, Google, Cognition and open-source models, but every one of them is served by Cognition: the CLI model reference documents no API key, base URL, gateway, Bedrock, Vertex or Azure deployment of your own, matching pricing.byok = false. | No |
| Local models | NoNo base URL, gateway or local endpoint setting exists in the Devin CLI config reference (https://docs.devin.ai/cli/reference/configuration/config-file). | No |
| Cost | ||
| Pricing model | mixed | mixed |
| Starts at | $20/mo | $20/mo |
| Free tier | Yes | No |
| Bring your own key | NoUsage is billed in Cognition ACUs and no LLM provider key can be supplied; Devin Outposts (https://docs.devin.ai/cloud/outposts/overview) only moves session compute onto your own machines. | YesA Codex subscription can be connected to a Core plan. |
| Openness | ||
| Open source | No | No |
| License | proprietary | proprietary |
| GitHub stars | n/a | n/a |
Which one would each critic pick
| Critic | Devin | Ona | Pick |
|---|---|---|---|
| El Juez | — | — | not enough reviews |
| El Amigo | 6.3 | 6.8 | Ona — Pick Ona when you want to hand over a ticket and get a pull request without opening a branch; pick Devin if you want the same shape with a longer track record. |
| El Crítico | 5.3 | 6.3 | Ona — The recommended backbone narrowed to one lab's agent and the earlier alternative is documented as deprecated for Enterprise, so model diversity here is ending, not expanding. |
| El Profesor | 5.0 | 7.3 | Ona — Verification has a real substrate: the agent works inside an environment carrying your toolchain, permissions and network access, so a claim can be executed rather than argued. |
| La Inversora | 6.8 | 7.8 | Ona — This was Gitpod, renamed in 2025, and it is now part of the OpenAI Platform, so the cap-table question every buyer asks has already been answered. |
| La Jefa | 5.8 | 7.3 | Ona — Core starts at $20 a month with 80 to 2,200 compute units and top-ups from $10 per 40, and Enterprise runs inside our VPC with kernel-level policy and audit trails. |
| El Hacker | 2.5 | 4.5 | Ona — Closed source and cloud-only, but it speaks MCP and a Codex subscription can be attached to a Core plan, which is the one string I get to hold. |
Picks are derived from each critic's own scores. Humans vote on matchups on the duels page.