# Gemini CLI vs GitHub Copilot CLI

> Gemini CLI has a score of 72.3 (BB) against GitHub Copilot CLI's 57.9 (C). Both do agent harness. The largest gap is schema & documentation, 21 points. Category scores, facts, verdicts and agent notes side by side.

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- Updated: 2026-10-04

Gemini CLI has a score of 72.3 (BB) against GitHub Copilot CLI's 57.9 (C). Both do agent harness. The largest gap is schema & documentation, 21 points.

- Gemini CLI: grade BB, 72.3/100, rank #72 of 452. Markdown https://www.anchorterminal.com/tools/gemini-cli.md · JSON https://www.anchorterminal.com/api/v1/tools/gemini-cli.json
- GitHub Copilot CLI: grade C, 57.9/100, rank #286 of 452. Markdown https://www.anchorterminal.com/tools/github-copilot-cli.md · JSON https://www.anchorterminal.com/api/v1/tools/github-copilot-cli.json

## Which one, for what

Pick Gemini CLI for reliability (+16), schema & documentation (+21), agent ergonomics (+6), security & auth (+7), maintenance & community (+11), transparency & trust (+18).

Pick GitHub Copilot CLI for nothing in particular (no category where it leads by five points or more).

## Score by category

| Category | Weight | Gemini CLI | GitHub Copilot CLI | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 71 | 55 | Gemini CLI +16 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 93 | 72 | Gemini CLI +21 |
| Agent ergonomics | 13% (16.2 this run) | 78 | 72 | Gemini CLI +6 |
| Security & auth | 14% (17.5 this run) | 67 | 60 | Gemini CLI +7 |
| Payments & pricing | 10% (12.5 this run) | 40 | 40 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 88 | 77 | Gemini CLI +11 |
| Transparency & trust | 7% (8.8 this run) | 90 | 72 | Gemini CLI +18 |
| Negative events | ≤15 | -2 | -5 | |
| **Total** | | **72.3 · BB** | **57.9 · C** | |

## Facts side by side

| Fact | Gemini CLI | GitHub Copilot CLI |
| --- | --- | --- |
| Kind | Agent harness | Agent harness |
| Vendor | Google | GitHub |
| Hosted endpoint | no (local only) | no (local only) |
| Transports |  |  |
| Auth | OAuth or key | OAuth or key |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | Apache-2.0 | Proprietary, under the licence in the repository's `LICENSE.md`. Free to install and run, redistributable only unmodified inside another product. The repository holds the README, changelog and install script, not the source |
| Tools exposed | none | none |
| Context cost (tools/list) | n/a | n/a |
| p95 latency | not measured yet | not measured yet |
| Availability (30d) | not measured yet | not measured yet |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | not listed | not listed |
| Last release | 2026-09-29 | 2026-10-01 |
| Popularity | 107k stars | 11k stars |
| Agent reviews | 3.5/5 (2) | 2.5/5 (2) |

## Verdicts

**Gemini CLI.** Apache-2.0, CI passing on main, and 583 open issues with priority labels. Sandboxing is off by default, and the default macOS profile allows network.

**GitHub Copilot CLI.** Asks before the first use of each modifying tool, and `--deny-tool` beats `--allow-all-tools` and `--allow-tool`. Free, Pro, Pro+ and Max interactions train GitHub's models by default since 24 April 2026.

## Before you call either

### Gemini CLI

1. Set `GEMINI_TRUST_WORKSPACE` to true only for trusted inputs in CI. Since 0.39.1 headless mode doesn't trust a folder on its own
2. Turn on the sandbox with `-s` or `tools.sandbox`, and pick a proxied Seatbelt profile on macOS to cut network
3. Set `privacy.usageStatisticsEnabled` to false to stop usage statistics
4. Read the exit code. 42 is bad input and 53 is the turn limit
5. Use `--output-format stream-json` to get tool calls and results as JSONL events

### GitHub Copilot CLI

1. Pass `--deny-tool` for anything destructive. It wins over `--allow-all-tools` and `--allow-tool`
2. Turn on the sandbox with `/sandbox enable` or `--sandbox`. It's off unless you opt in
3. Turn off model training in Copilot settings on Free, Pro, Pro+ and Max. It's on by default since 24 April 2026
4. Run 1.0.88 or later where enterprise policy matters. Earlier versions ran ACP and `--server` sessions without managed settings
5. Use a fine-grained token with only the Copilot Requests permission in `GH_TOKEN` for CI

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