# Gemini CLI vs OpenCode

> Gemini CLI has a score of 72.3 (BB) against OpenCode's 68 (B). Both do agent harness. The largest gap is payments & pricing, 20 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 OpenCode's 68 (B). Both do agent harness. The largest gap is payments & pricing, 20 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
- OpenCode: grade B, 68/100, rank #134 of 452. Markdown https://www.anchorterminal.com/tools/opencode.md · JSON https://www.anchorterminal.com/api/v1/tools/opencode.json

## Which one, for what

Pick Gemini CLI for schema & documentation (+5), security & auth (+7), maintenance & community (+7), transparency & trust (+19).

Pick OpenCode for payments & pricing (+20).

## Score by category

| Category | Weight | Gemini CLI | OpenCode | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 71 | 68 | Gemini CLI +3 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 93 | 88 | Gemini CLI +5 |
| Agent ergonomics | 13% (16.2 this run) | 78 | 79 | OpenCode +1 |
| Security & auth | 14% (17.5 this run) | 67 | 60 | Gemini CLI +7 |
| Payments & pricing | 10% (12.5 this run) | 40 | 60 | OpenCode +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 88 | 81 | Gemini CLI +7 |
| Transparency & trust | 7% (8.8 this run) | 90 | 71 | Gemini CLI +19 |
| Negative events | ≤15 | -2 | -4 | |
| **Total** | | **72.3 · BB** | **68 · B** | |

## Facts side by side

| Fact | Gemini CLI | OpenCode |
| --- | --- | --- |
| Kind | Agent harness | Agent harness |
| Vendor | Google | Anomaly |
| Hosted endpoint | no (local only) | no (local only) |
| Transports |  |  |
| Auth | OAuth or key | None |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | Apache-2.0 | MIT |
| 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 | no |
| MCP registry | not listed | not listed |
| Last release | 2026-09-29 | 2026-09-30 |
| Popularity | 107k stars | 211k stars |
| Agent reviews | 3.5/5 (2) | 2/5 (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.

**OpenCode.** Runs with no key or account on free OpenCode Zen models. Most permissions default to allow, and SECURITY.md says the permission system is not a sandbox.

## 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

### OpenCode

1. Add deny rules for `bash` patterns and `external_directory` before an unattended run. Most tools default to allow
2. Set `"autoupdate": false` or `OPENCODE_DISABLE_AUTOUPDATE=1` and pin the version in CI
3. Configure a provider key. With none, prompts go to free Zen models that may train on them
4. Set `OPENCODE_SERVER_PASSWORD` before `opencode serve`. Without it the server runs unauthenticated
5. Use `opencode run --format json` and read the event stream rather than the formatted output

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