OpenAI Operator vs Project Mariner
OpenAI Operator vs Project Mariner: side-by-side comparison of two computer-use & desktop agents systems — architecture, taxonomy, license, pricing, MCP/A2A support, and direct edges.
OpenAI Operator · Project Mariner
Cost & capability
| OpenAI Operator | Project Mariner | |
|---|---|---|
| Capability band | competent | competent |
| Capability composite | 72 | 73 |
| Cost tier | premium | mid |
| Use cases | Scoped Agentic | Scoped Agentic |
Where they differ (13)
Rows where both sides have data and the values disagree — the shortlist of dimensions that actually distinguish these two systems.
| OpenAI Operator | Project Mariner | |
|---|---|---|
| Capability composite | 72 | 73 |
| Cost tier | premium | mid |
| Type | Consumer computer-use agent (browser-only) | Google DeepMind browser-agent (research preview) |
| Created | 2025-01 | 2024-12 |
| Pricing | Bundled with ChatGPT Pro $200/mo | Bundled with Gemini Advanced ($19.99/mo) |
| Funding | OpenAI parent — ~$157B val 2024-10; $40B round Mar-2025 ($300B val) | Google DeepMind parent (Alphabet) |
| Backend storage | OpenAI-hosted browser session state; no durable cross-session memory by default | Google-managed session state |
| Deployment | Cloud (OpenAI-hosted browser sandbox) — no self-host | Chrome extension + Google Cloud |
| API surface | Computer-use tool exposed via Responses API (computer-use-preview model) | Chrome extension; underlying Gemini 2.0 API |
| Multi-tenancy | single-tenant per ChatGPT Pro account; sandboxed sessions | Single-tenant per Google account |
| A2A | searched not found | Google's own A2A protocol — likely first-party compatible |
| Optimised for | Consumer-grade autonomous web tasks in OpenAI-hosted browser | Gemini 2.0-powered Chrome agent |
| Anti-fit | Not for desktop apps (browser-only); no self-host; US-only at launch | Research preview only; Chrome only; Gemini Advanced tier |
At a glance
| OpenAI Operator | Project Mariner | |
|---|---|---|
| Section | Computer-use & desktop agents | Computer-use & desktop agents |
| Tier | T1 | T1 |
| Type | Consumer computer-use agent (browser-only) | Google DeepMind browser-agent (research preview) |
| Created | 2025-01 | 2024-12 |
| Pricing | Bundled with ChatGPT Pro $200/mo | Bundled with Gemini Advanced ($19.99/mo) |
| Funding | OpenAI parent — ~$157B val 2024-10; $40B round Mar-2025 ($300B val) | Google DeepMind parent (Alphabet) |
| Backend storage | OpenAI-hosted browser session state; no durable cross-session memory by default | Google-managed session state |
| Deployment | Cloud (OpenAI-hosted browser sandbox) — no self-host | Chrome extension + Google Cloud |
| API surface | Computer-use tool exposed via Responses API (computer-use-preview model) | Chrome extension; underlying Gemini 2.0 API |
| Multi-tenancy | single-tenant per ChatGPT Pro account; sandboxed sessions | Single-tenant per Google account |
| MCP | searched not found | searched not found |
| A2A | searched not found | Google's own A2A protocol — likely first-party compatible |
| OpenTelemetry | searched not found | searched not found |
| Optimised for | Consumer-grade autonomous web tasks in OpenAI-hosted browser | Gemini 2.0-powered Chrome agent |
| Anti-fit | Not for desktop apps (browser-only); no self-host; US-only at launch | Research preview only; Chrome only; Gemini Advanced tier |
Taxonomy
| Axis | OpenAI Operator | Project Mariner |
|---|---|---|
| storage | kv | kv |
| retrieval | injection | injection |
| persistence | session | session |
| update | agent-controlled | agent-controlled |
| unit | turn | turn |
| governance | opaque | opaque |
| conflict | stateless | stateless |
Pros & cons
OpenAI Operator
Pros: First consumer-grade computer-use agent from a major lab; OpenAI distribution; benchmark numbers public.
Cons: US Pro-only at launch; browser-only; OpenAI-hosted (no self-host); takeover UX still rough.
Project Mariner
Pros: Strong WebVoyager numbers; Google distribution; A2A first-party adjacency.
Cons: Research preview; Chrome / Gemini Advanced tier; closed source.