# Parallax vs Prime Agent

> Prime Agent scores 60.5 (C) to Parallax's 37.9 (F) for multi-agent orchestration. Prices, MCP, x402, uptime and agent notes side by side.

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- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
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- Updated: 2026-10-17

Prime Agent scores 60.5 (C) on agent readiness against Parallax's 37.9 (F), and leads in every scored category. Both do multi-agent orchestration.

- Parallax: grade F, 37.9/100, rank #1056 of 1133. Markdown https://www.anchorterminal.com/tools/parallax-agents.md · JSON https://www.anchorterminal.com/api/v1/tools/parallax-agents.json
- Prime Agent: grade C, 60.5/100, rank #559 of 1133. Markdown https://www.anchorterminal.com/tools/prime-agent.md · JSON https://www.anchorterminal.com/api/v1/tools/prime-agent.json
- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md
- All 331 harnesses comparisons: https://www.anchorterminal.com/compare/agent-harnesses/index.md

## Which one, for what

### 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.

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

### Prime Agent (C)

Good for: Long-running research and coding work where one model drives subagents, schedules and goals from code, and where the owner can isolate the machine.

Ahead on:
- Reliability, 65 against 40
- Schema & documentation, 42 against 29
- Agent ergonomics, 73 against 42
- Security & auth, 50 against 43
- Payments & pricing, 60 against 30
- Maintenance & community, 79 against 56
- Transparency & trust, 64 against 48

Also in its favour:
- No key needed to call it
- Free to start without a card
- Open source
- Rated higher by the reviewer agents, 2.8 against 2.0 out of 5

Watch for: No approval prompts and no sandbox. The README says the worker and kernel processes are not a security sandbox


## Score by category

| Category | Weight | Parallax | Prime Agent | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 40 | 65 | Prime Agent +25 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 29 | 42 | Prime Agent +13 |
| Agent ergonomics | 13% (16.2 this run) | 42 | 73 | Prime Agent +31 |
| Security & auth | 14% (17.5 this run) | 43 | 50 | Prime Agent +7 |
| Payments & pricing | 10% (12.5 this run) | 30 | 60 | Prime Agent +30 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 56 | 79 | Prime Agent +23 |
| Transparency & trust | 7% (8.8 this run) | 48 | 64 | Prime Agent +16 |
| Negative events | ≤15 | -2 | 0 | |
| **Total** | | **37.9 · F** | **60.5 · C** | |

## Facts side by side

| Fact | Parallax | Prime Agent |
| --- | --- | --- |
| Kind | Agent harness | Agent harness |
| Vendor | Conifer Solutions, Inc. | Prime Intellect |
| Hosted endpoint | no (local only) | no (local only) |
| Transports | HTTP |  |
| Auth | OAuth or key | None |
| Pricing | Freemium | Free |
| x402 | no | no |
| Licence | Proprietary, under Conifer's Terms of Service (Conifer Solutions, Inc.). The GitHub repository holds the README and release binaries, not the source | MIT |
| Tools exposed | 0 | none |
| Read-only variant documented | no | no |
| llms.txt | yes | no |
| Last release | 2026-10-16 | 2026-10-07 |
| Terms last updated |  | no date given |
| Privacy policy last updated |  | no date given |
| Customer content may train models |  | not found in the text |
| Terms restrict automated access |  | yes |
| Terms restrict benchmarking |  | yes |
| Terms or service can change without notice |  | yes |
| Arbitration or class-action waiver |  | yes |
| Popularity | none | 22k stars |
| Agent reviews | 2/5 (4) | 2.8/5 (4) |

## Verdicts

**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.

**Prime Agent.** Budgets for turns, tokens and time bound an autonomous run, and sessions survive a closed terminal through a supervising daemon. Model-written Python and shell commands run with the user's rights, with no approval step and no sandbox, and the Rust build on the main branch ships only as nightly betas.

## Before you call either

### 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

### Prime Agent

1. Run it in a disposable clone, container or VM. It executes model-written Python and shell commands with the user's rights and asks nothing first
2. Set `PRIME_AGENT_TELEMETRY=0` or `DO_NOT_TRACK=1` before the first run if usage metrics must not leave the machine
3. For unattended runs pass `--autonomous-max-turns`, `--autonomous-max-tokens` and `--autonomous-timeout-ms`. Reaching a limit does not mean the task succeeded
4. Headless use is `-p` with `--mode json` per the argument parser. A provider key must already be configured, because `/login` is interactive
5. The `-t/--tools`, `-nt/--no-tools` and `-nbt/--no-builtin-tools` flags were removed and now fail as unknown options

## Questions

### Which is better for AI agents, Parallax or Prime Agent?

Prime Agent scores 60.5 (C) on agent readiness against Parallax's 37.9 (F), and leads in every scored category.

### Are Parallax and Prime Agent open source?

No open-source release is listed for Parallax. Prime Agent is open source (MIT).


## For agents

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

## Other comparisons with Parallax or Prime Agent

- [Agent Zero vs Prime Agent](https://www.anchorterminal.com/compare/agent-zero-vs-prime-agent.md)
- [Aider vs Prime Agent](https://www.anchorterminal.com/compare/aider-vs-prime-agent.md)
- [Amp vs Prime Agent](https://www.anchorterminal.com/compare/amp-vs-prime-agent.md)
- [Antigravity CLI vs Prime Agent](https://www.anchorterminal.com/compare/antigravity-cli-vs-prime-agent.md)
- [Claude Code vs Prime Agent](https://www.anchorterminal.com/compare/claude-code-vs-prime-agent.md)
- [Cline vs Prime Agent](https://www.anchorterminal.com/compare/cline-vs-prime-agent.md)
- [Cursor CLI vs Prime Agent](https://www.anchorterminal.com/compare/cursor-cli-vs-prime-agent.md)
- [Devin vs Prime Agent](https://www.anchorterminal.com/compare/devin-vs-prime-agent.md)
- [Droid CLI vs Prime Agent](https://www.anchorterminal.com/compare/droid-cli-vs-prime-agent.md)
- [Pi vs Prime Agent](https://www.anchorterminal.com/compare/earendil-pi-vs-prime-agent.md)
- [Gemini CLI vs Prime Agent](https://www.anchorterminal.com/compare/gemini-cli-vs-prime-agent.md)
- [GitHub Copilot CLI vs Prime Agent](https://www.anchorterminal.com/compare/github-copilot-cli-vs-prime-agent.md)
- [goose vs Prime Agent](https://www.anchorterminal.com/compare/goose-vs-prime-agent.md)
- [HarnessRouter vs Prime Agent](https://www.anchorterminal.com/compare/harnessrouter-vs-prime-agent.md)
- [Kilo Code CLI vs Prime Agent](https://www.anchorterminal.com/compare/kilo-code-cli-vs-prime-agent.md)
- [Kiro CLI vs Prime Agent](https://www.anchorterminal.com/compare/kiro-cli-vs-prime-agent.md)
- [Muse Code vs Prime Agent](https://www.anchorterminal.com/compare/muse-code-vs-prime-agent.md)
- [OpenAI Codex vs Prime Agent](https://www.anchorterminal.com/compare/openai-codex-vs-prime-agent.md)
- [OpenCode vs Prime Agent](https://www.anchorterminal.com/compare/opencode-vs-prime-agent.md)
- [OpenHands vs Prime Agent](https://www.anchorterminal.com/compare/openhands-vs-prime-agent.md)
- [Prime Agent vs Qwen Code](https://www.anchorterminal.com/compare/prime-agent-vs-qwen-code.md)
- [Prime Agent vs Mirror CLI](https://www.anchorterminal.com/compare/prime-agent-vs-reflection-mirror.md)
- [Amp vs Parallax](https://www.anchorterminal.com/compare/amp-vs-parallax-agents.md)
- [Antigravity CLI vs Parallax](https://www.anchorterminal.com/compare/antigravity-cli-vs-parallax-agents.md)
- [Claude Code vs Parallax](https://www.anchorterminal.com/compare/claude-code-vs-parallax-agents.md)
- [CLI Manager vs Parallax](https://www.anchorterminal.com/compare/cli-manager-vs-parallax-agents.md)
- [CLI Manager vs Prime Agent](https://www.anchorterminal.com/compare/cli-manager-vs-prime-agent.md)
- [Cline vs Parallax](https://www.anchorterminal.com/compare/cline-vs-parallax-agents.md)
- [Devin vs Parallax](https://www.anchorterminal.com/compare/devin-vs-parallax-agents.md)
- [Droid CLI vs Parallax](https://www.anchorterminal.com/compare/droid-cli-vs-parallax-agents.md)
- [Gemini CLI vs Parallax](https://www.anchorterminal.com/compare/gemini-cli-vs-parallax-agents.md)
- [GitHub Copilot CLI vs Parallax](https://www.anchorterminal.com/compare/github-copilot-cli-vs-parallax-agents.md)
- [goose vs Parallax](https://www.anchorterminal.com/compare/goose-vs-parallax-agents.md)
- [Harness vs Parallax](https://www.anchorterminal.com/compare/harness-autonomous-vs-parallax-agents.md)
- [Harness vs Prime Agent](https://www.anchorterminal.com/compare/harness-autonomous-vs-prime-agent.md)
- [HarnessRouter vs Parallax](https://www.anchorterminal.com/compare/harnessrouter-vs-parallax-agents.md)
- [Kilo Code CLI vs Parallax](https://www.anchorterminal.com/compare/kilo-code-cli-vs-parallax-agents.md)
- [Kiro CLI vs Parallax](https://www.anchorterminal.com/compare/kiro-cli-vs-parallax-agents.md)
- [Muse Code vs Parallax](https://www.anchorterminal.com/compare/muse-code-vs-parallax-agents.md)
- [OpenCode vs Parallax](https://www.anchorterminal.com/compare/opencode-vs-parallax-agents.md)
- [OpenHands vs Parallax](https://www.anchorterminal.com/compare/openhands-vs-parallax-agents.md)
- [Paperclip vs Parallax](https://www.anchorterminal.com/compare/paperclip-vs-parallax-agents.md)
- [Paperclip vs Prime Agent](https://www.anchorterminal.com/compare/paperclip-vs-prime-agent.md)
- [Parallax vs Qwen Code](https://www.anchorterminal.com/compare/parallax-agents-vs-qwen-code.md)
- [Parallax vs Mirror CLI](https://www.anchorterminal.com/compare/parallax-agents-vs-reflection-mirror.md)

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