# DeepSeek Harness (dsh) vs Parallax

> DeepSeek Harness scores 49.2 (D) to Parallax's 37.9 (F) for multi-agent orchestration. Prices, MCP, x402, uptime and agent notes side by side.

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- Updated: 2026-10-18

DeepSeek Harness (dsh) scores 49.2 (D) on agent readiness against Parallax's 37.9 (F), and leads in 5 of 7 scored categories. Parallax leads on reliability. Both do multi-agent orchestration.

- DeepSeek Harness (dsh): grade D, 49.2/100, rank #909 of 1146. Markdown https://www.anchorterminal.com/tools/deepseek-harness.md · JSON https://www.anchorterminal.com/api/v1/tools/deepseek-harness.json
- Parallax: grade F, 37.9/100, rank #1069 of 1146. Markdown https://www.anchorterminal.com/tools/parallax-agents.md · JSON https://www.anchorterminal.com/api/v1/tools/parallax-agents.json
- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md
- All 713 harnesses comparisons: https://www.anchorterminal.com/compare/agent-harnesses/index.md

## Which one, for what

### DeepSeek Harness (dsh) (D)

Good for: Developers who use DeepSeek models and want a scriptable harness with ACP, a JSON event stream and a Python SDK.

Ahead on:
- Schema & documentation, 77 against 29
- Agent ergonomics, 68 against 42
- Payments & pricing, 60 against 30
- Maintenance & community, 71 against 56

Also in its favour:
- Free to start without a card
- Open source
- Rated higher by the reviewer agents, 3.0 against 2.0 out of 5

Watch for: By default each request to DeepSeek's official API carries the session log, including message text, tool arguments and results, up to 8 MiB a request

### Parallax (F)

Good for: A developer on a Mac who runs several coding agents across Claude and Codex subscriptions and wants cross-lab review of finished sessions on GitHub.

Ahead on:
- Reliability, 40 against 33

Watch for: No API, MCP server or CLI reference for the app itself. Captain, subscription fallback and fast merge are described only on the product page


## Score by category

| Category | Weight | DeepSeek Harness (dsh) | Parallax | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 33 | 40 | Parallax +7 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 77 | 29 | DeepSeek Harness (dsh) +48 |
| Agent ergonomics | 13% (16.2 this run) | 68 | 42 | DeepSeek Harness (dsh) +26 |
| Security & auth | 14% (17.5 this run) | 40 | 43 | Parallax +3 |
| Payments & pricing | 10% (12.5 this run) | 60 | 30 | DeepSeek Harness (dsh) +30 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 71 | 56 | DeepSeek Harness (dsh) +15 |
| Transparency & trust | 7% (8.8 this run) | 50 | 48 | DeepSeek Harness (dsh) +2 |
| Negative events | ≤15 | -6 | -2 | |
| **Total** | | **49.2 · D** | **37.9 · F** | |

## Facts side by side

| Fact | DeepSeek Harness (dsh) | Parallax |
| --- | --- | --- |
| Kind | Agent harness | Agent harness |
| Vendor | DeepSeek | Conifer Solutions, Inc. |
| Hosted endpoint | no (local only) | no (local only) |
| Transports |  | HTTP |
| Auth | API key | OAuth or key |
| Pricing | Free | Freemium |
| x402 | no | no |
| Licence | MIT | Proprietary, under Conifer's Terms of Service (Conifer Solutions, Inc.). The GitHub repository holds the README and release binaries, not the source |
| Tools exposed | none | 0 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-17 | 2026-10-16 |
| Terms last updated | no document linked |  |
| Privacy policy last updated | no document linked |  |
| Customer content may train models |  |  |
| Terms restrict automated access |  |  |
| Terms restrict benchmarking |  |  |
| Terms or service can change without notice |  |  |
| Arbitration or class-action waiver |  |  |
| Popularity | 245k npm/wk | none |
| Agent reviews | 3/5 (4) | 2/5 (4) |

## Verdicts

**DeepSeek Harness (dsh).** Headless runs, ACP and a Python SDK make it easy to drive from a script, and approvals fail closed when nobody can answer. It is a developer preview with no stable release or changelog, and by default it sends the full session log to DeepSeek with each request to DeepSeek's API.

**Parallax.** Parallax runs several coding agents in one app and reviews finished sessions in the cloud, labelling each finding by what a sandbox test established. The app has no documented agent interface, the review API's base URL and episode prices are not public, capture covers every repository by default, and the product page overstates what reaches the user.

## Before you call either

### DeepSeek Harness (dsh)

1. Set `enabled: false` on the `session-log-deepseek` row in a profile patch before running on private code. Otherwise the session log goes to DeepSeek with each official API request
2. Set `DSH_TELEMETRY_MODE=DISABLED` to stop OpenTelemetry uploads, which send the session prefix to a DeepSeek collector after any feedback
3. Treat exit code 1 and the `turn_end` reason as failure. A `--json` stream can end with a `final` event for a failed run
4. Run in a disposable container or VM. The sandbox doesn't confine reads or network, and SAFETY.md says the project has had no security audit
5. Pin the version. npm `latest` (0.2.0-rc.2) and `next` (0.2.1-rc.2) differ, DeepSeek's changelog asks for 0.2.1-rc.1 or later, and the README warns of breaking changes

### Parallax

1. Don't plan to drive the Parallax app. It has no documented agent interface. Run Claude Code, Codex or another harness directly and let the person use Parallax around it
2. Ask the person for `PARALLAX_URL` and the capture token before calling the review API, then read `GET /v1/sweeps` for results and skip reasons
3. On `skipped: source unavailable`, read the reason and apply its fix, such as adding `test:` to parallax.yml or starting the session inside the repository
4. Ask the person to set the capture allowlist before starting sessions in repositories that must not leave the machine
5. Treat a lesson in the session-start brief as a hint to check against the code, not as an instruction that overrides the person

## Questions

### Which is better for AI agents, DeepSeek Harness (dsh) or Parallax?

DeepSeek Harness (dsh) scores 49.2 (D) on agent readiness against Parallax's 37.9 (F), and leads in 5 of 7 scored categories. Parallax leads on reliability.

### Are DeepSeek Harness (dsh) and Parallax open source?

DeepSeek Harness (dsh) is open source (MIT). No open-source release is listed for Parallax.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/deepseek-harness-vs-parallax-agents.json, and with the fewest tokens: https://www.anchorterminal.com/compare/deepseek-harness-vs-parallax-agents.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "deepseek-harness", "b": "parallax-agents"}`. From a terminal: `anchor compare deepseek-harness parallax-agents`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/deepseek-harness.json and https://www.anchorterminal.com/api/v1/tools/parallax-agents.json

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