Codex vs Claude vs Gemini Computer Use: April 2026
Codex vs Claude vs Gemini Computer Use: April 2026
April 16, 2026 was the moment AI “computer use” went mainstream. OpenAI shipped Codex Background Computer Use on macOS, joining Anthropic’s Claude computer use API and Google’s Gemini Chrome agent. All three can now drive GUI software — but they differ dramatically in where they run, what they can see, and what they do best. Here is the April 2026 head-to-head.
Last verified: April 22, 2026
TL;DR
| Factor | Winner |
|---|---|
| Best on macOS desktop apps | Codex (Background Computer Use) |
| Best on headless Linux / cloud | Claude Opus 4.7 |
| Best in Chrome specifically | Gemini (built into Chrome) |
| Best benchmark (OSWorld-Verified) | Claude Opus 4.7 (78%) |
| Best parallel agents | Codex (multiple virtual sessions) |
| Best for developers | Claude Opus 4.7 via API |
| Free tier available | Gemini (Chrome) |
| Most mature API | Claude (oldest, since Oct 2024) |
What each one is
OpenAI Codex — Background Computer Use (April 16, 2026)
- Model: GPT-5.4 + tool-use extensions
- Platform: macOS 14+, Apple Silicon only
- Runs: Locally on your Mac, in virtual display sessions
- Parallel agents: Yes — multiple concurrent sessions, no cursor conflict
- Access: Included with ChatGPT Plus / Pro / Business
Anthropic Claude — Computer Use (v4 API)
- Model: Claude Opus 4.7 (new), Sonnet 4.6
- Platform: Any OS — agent runs in a sandboxed Linux/Chromium environment
- Runs: Typically in a Docker container or cloud VM
- Parallel agents: Yes via API
- Access: Anthropic API (paid per-token), Claude Code (MCP plugin), Bedrock, Vertex AI
Google Gemini — Chrome Agent
- Model: Gemini 3.1 Pro
- Platform: Chrome on macOS/Windows/Linux/ChromeOS
- Runs: Inside your Chrome browser profile
- Parallel agents: Limited (one active Chrome session)
- Access: Free with Gemini account; Advanced features require Google AI Pro
Benchmarks (April 2026)
| Benchmark | Codex (GPT-5.4) | Claude Opus 4.7 | Gemini 3.1 Pro |
|---|---|---|---|
| OSWorld-Verified | 71.5% | 78.0% | 62.8% |
| WebArena | 68.4% | 73.1% | 74.9% |
| WebVoyager | 82.1% | 86.2% | 84.0% |
| VisualWebArena | 64.8% | 69.2% | 66.5% |
| ScreenSpot-Pro | 79.4% | 82.6% | 71.2% |
Claude Opus 4.7 leads most computer-use benchmarks. But benchmarks don’t measure what Codex’s new release actually ships — parallel macOS sessions driving native apps — so the real-world picture is more nuanced.
Where each shines
Codex Background Computer Use — best for macOS workflows
Real example: “Export all frames from this Figma file as 2x PNGs, upload them to our S3 bucket, then update our Notion doc with the new CDN URLs.”
- Codex opens Figma, exports, opens Transmit, uploads, opens Notion, edits
- All while you keep typing in another app
- Multiple Codex agents can work in parallel
Where it struggles:
- Anything outside macOS
- Anything headless (e.g., CI-driven computer use)
- Anything that doesn’t run on Apple Silicon
Claude Computer Use — best for developers and cloud
Real example: “Run this 500-item e-commerce scraper across a fleet of containers, each logged into a different partner portal.”
- Claude runs in a sandboxed Ubuntu + Chromium container per task
- Scales horizontally on any cloud
- Highest OSWorld-Verified score (78%)
- Works in CI, on-prem, air-gapped
Where it struggles:
- No native desktop integration — you build your own UI
- Setup requires Docker / Anthropic API / scripting
- Slower wall-clock per task than local Codex for small jobs
Gemini Chrome agent — best for browser-only work
Real example: “Fill out this expense report in Concur using the last 12 receipts in my Downloads folder.”
- Works inside your logged-in Chrome profile
- Sees cookies, sessions, saved passwords (with your permission)
- Free to try at chrome.google.com/gemini
- Tightly integrated with Google Workspace
Where it struggles:
- Chrome-only — can’t leave the browser
- No true parallel agent mode
- Weaker on complex multi-step tasks (OSWorld 62.8%)
Access and cost
| Product | How to start | Cost |
|---|---|---|
| Codex Background Computer Use | Update Codex app → install Computer Use plugin | Included in ChatGPT Plus ($20) / Pro ($200) |
| Claude Computer Use | Anthropic API docs → computer-use-20260416 tool | Token-based: Opus 4.7 at $15/$75 per 1M |
| Gemini Chrome agent | chrome.google.com/gemini → enable agent | Free tier; Advanced on Google AI Pro ($20/mo) |
Security posture
| Concern | Codex | Claude | Gemini |
|---|---|---|---|
| Sandboxed | Virtual display on your Mac | Docker container (you control) | Chrome sandbox |
| Sees your files | Only granted folders | Only in the container | Only browser downloads |
| Sees your passwords | Only if you fill them | No (your container) | Yes (Chrome profile) |
| Prompt injection risk | High (multi-app) | Medium (contained) | High (browser content) |
| Kill switch | ⌘⇧K | API call | Browser extension toggle |
Reality check: All three can be jailbroken via prompt injection from web content or email. Treat any computer-use agent as a middle-trust user on your machine — not as you, and not as a stranger.
Parallel agents
This is where Codex’s April 16 launch is genuinely novel:
| Product | Max parallel agents | Do they interfere with your cursor? |
|---|---|---|
| Codex (macOS) | ~10 (Pro) | No — virtual display layer |
| Claude (containers) | Unlimited (your compute) | N/A — headless |
| Gemini (Chrome) | 1 | Yes — takes over your Chrome tab |
If you want to hand off 5 different research tasks at once, Codex on macOS or Claude in containers are your only real choices.
Who should use which?
You should use Codex if…
- You’re on a Mac with Apple Silicon
- You already pay for ChatGPT Plus/Pro
- Your work spans 3+ desktop apps
- You want parallel agents you can watch
You should use Claude if…
- You’re building a product (not a personal workflow)
- You need cloud / Linux / headless
- You want the highest OSWorld benchmarks
- You need the most predictable API
You should use Gemini if…
- 90% of your workflow is already in Chrome
- You use Google Workspace heavily
- You want a free entry point
- You’re on Linux or an older Mac
Quick decision guide
| If you want to… | Use |
|---|---|
| Automate my Mac | Codex |
| Build a computer-use product | Claude |
| Automate Chrome / Google Apps | Gemini |
| Run agents on my cloud infra | Claude |
| Try without paying | Gemini |
| Highest benchmark scores | Claude (Opus 4.7) |
| Most parallel desktop agents | Codex |
| Agents in a secure container | Claude |
Verdict
For April 2026, computer use is a three-product market. Codex is the best desktop agent for Mac users — full stop. Claude is the best API and the benchmark leader, and the right choice for anyone building a computer-use product. Gemini is the best free entry point and is unmatched inside Chrome + Google Workspace.
The biggest practical question is not “which is smartest” (Claude Opus 4.7 wins that on paper) but “where does my work happen?” — macOS apps → Codex, cloud / containers → Claude, Chrome → Gemini.
Expect Anthropic to ship a native Claude desktop app with parallel computer use before the end of 2026. That’s the one piece missing from its lineup, and it would flip the market again.
Related
- What is Codex ‘for almost everything’?
- Claude Opus 4.7 vs GPT-5.4 vs Gemini 3.1 Pro
- How to use Codex background computer use on Mac
- Best AI browser agents (April 2026)