Head to head · Agent harnesses · October 2026 research run

OpenCode vs Traycer

OpenCode scores 68.8 (B) on agent readiness against Traycer's 57 (C), and leads in every scored category. Both do agent harnesses.

Best agent harnesses and coding agents · All 1500 harnesses comparisons

Which one, for what

OpenCode B

Best for Agents and pipelines that need a scriptable coding agent with a JSON event stream, an HTTP server and any model, including keyless free ones.

Ahead on

  • Reliability, 72 against 65
  • Schema & documentation, 88 against 65
  • Agent ergonomics, 79 against 65
  • Security & auth, 60 against 42
  • Payments & pricing, 60 against 30
  • Maintenance & community, 81 against 75
  • Transparency & trust, 71 against 60

Also in its favour

  • Free to start without a card

Watch for

Most permissions default to allow, and SECURITY.md says the permission system is not a sandbox

Traycer C

Best for Teams who want several coding agents working together with shared context and boards.

Also in its favour

  • No incidents deducted, where OpenCode loses 4 points for them

Watch for

Privacy Mode is opt-in for individuals; with it off, prompts may be logged

Why the edge

Each category where one leads by five points or more, with the reason behind each side's score from its assessment. The numbers are in the table below; this is what they stand for.

Payments & pricing OpenCode +30

OpenCode 60

No payment protocol (0). Scored on OpenCode Zen and Go. Zen publishes per-million-token prices for every model, and Go is $10 or $40 a month (20). The MIT package and the free Zen models need no card (20). With no key configured it loads the free Zen models with a public key, so an agent can install it and run a task with no signup at all (20).

Traycer 30

Scored on the paid option, Traycer's own inference subscription, whose price wasn't read (0 of 20). No protocol (0). Bring-your-own-agent use is free (20). Accounts for sync and teams weren't checked, half (10). 0 + 0 + 20 + 10 = 30.

Schema & documentation OpenCode +23

OpenCode 88

A JSON Schema for the config file at opencode.ai/config.json, and an OpenAPI 3.1 spec for the 1.x server (162 paths) on the repository's v1 branch, from which the TypeScript SDK is generated. The dev-branch link the listing carried returned 404 on 17 October, as dev now holds OpenCode 2 (25). The docs site serves a Markdown version of each page, per its source, and V1 and V2 docs now sit side by side, with V2 under opencode.ai/v2/docs (10). Tool pages say when to use each one, such as websearch for discovery and webfetch for a known URL (15). Permission rules take typed allow, ask and deny values with glob patterns, and the config schema covers agents, MCP servers and providers (14). Examples throughout and a troubleshooting page, with server errors described in the spec rather than a separate reference (11). A dated changelog at opencode.ai/changelog and GitHub releases (13).

Traycer 65

Harness reading. Mintlify docs, a protocol package and a CLI (65).

Security & auth OpenCode +18

OpenCode 60

Harness reading of the framework checklist, used for all five harnesses in this batch. 30 for what leaves the machine by default, 20 for approvals and sandboxing, 15 for prompt-injection posture, 15 for audit and 20 for the security programme. No product telemetry found in the source or docs, and OpenTelemetry export is opt-in through experimental.openTelemetry. It fetches the model list from models.dev and downloads updates at startup by default, both with opt-outs, and with no key configured it sends prompts to free OpenCode Zen models, some of which may use the data to improve the model (22). Allow, ask or deny per tool with glob patterns, .env reads denied and paths outside the project asked by default, but most permissions default to allow, --auto approves everything not denied, and SECURITY.md says the permission system is not a sandbox (9). SECURITY.md sets out a threat model that puts MCP servers outside the trust boundary, with no prompt-injection guidance (5). Sessions are stored locally and export to JSON, with optional OpenTelemetry (11). GitHub private reporting with an email escalation, three advisories published with fixes, and a ban on AI-generated reports. No security.txt (13). CVE-2026-88624 (published 22 September, CVSS 9.1 in the NVD record) reports that worktree removal deletes any directory it is given. In 1.19.5, as in 1.19.3, Worktree.remove still deletes an existing path that isn't a registered worktree. The call needs access to the server API, which SECURITY.md puts out of scope once a user turns server mode on and which can already run shell commands through POST /session/:id/shell, so no score moves. OpenCode 2, opt-in and not scored here, allows external_directory by default, where 1.x asks.

Traycer 42

Harness reading. Code is processed in memory and not used for training, but Privacy Mode is opt-in for individuals, prompts may be logged with it off, and Sentry and PostHog 'may be enabled in release builds' (10 of 30). No approval model described in the README (8 of 20). No prompt-injection guidance (5). No audit log found (5). SECURITY.md, CodeQL, Scorecard and secret scanning (14 of 20). 10 + 8 + 5 + 5 + 14 = 42.

Agent ergonomics OpenCode +14

OpenCode 79

Harness reading of the framework line, scored on what an agent or pipeline driving it has to supply. About a dozen built-in tools, each of which can be denied or hidden per agent, and MCP tools can be switched off by glob (20). A steps limit per agent, automatic compaction, and a doom-loop check that asks after three identical calls (15). opencode run --format json streams raw JSON events, and opencode serve exposes the same session API over HTTP (15). Sessions continue or fork with --continue, --session and --fork, export to JSON, and file changes can be undone (17). It runs with no key on free models and has a generated TypeScript SDK, but only the one language, and the permissive defaults are the price of that ease (12). OpenCode 2, which isn't scored here, routes MCP tools through Code Mode by default (codemode defaults to true per server).

Traycer 65

Harness reading. Model switching within an agent, agent-to-agent loops, a CLI and cross-device sync (65).

Transparency & trust OpenCode +11

OpenCode 71

MIT (30). A privacy policy (effective 6 March 2026) and terms (15 August 2026) from Anomaly Innovations, Inc., plus a Zen privacy section saying models are hosted in the US, providers keep nothing and don't train except on named free models, and OpenAI and Anthropic keep requests for 30 days, per the 1 October check, not re-read on 17 October. The general retention line is as long as necessary (22). Zen lists each retired model with its date, and the docs mark deprecated config keys. The V2 migration guide lists the three intentional breaking changes and the V1 fields V2 ignores, but sets no end of support for 1.x (15). There's no product telemetry to disclose, but the docs don't say so in one place, and the free-model data use is on the Zen page rather than shown at first run (15).

Traycer 60

MIT (30). README privacy section and a linked privacy policy (not read) (18 of 30). CHANGELOG.md, no deprecation policy (10). Analytics described as 'may be enabled', with no opt-out given in the README (8 of 20). 30 + 18 + 10 + 8 = 66.

Reliability OpenCode +7

OpenCode 72

Read as a local package, graded on the 1.x line that npm i -g opencode-ai and the opencode.ai/install script put on a machine. opencode-ai 1.19.5 on npm (npm's latest on 1 November) with native binaries for macOS, Linux and Windows on x64 and arm64, plus Homebrew, Scoop, Chocolatey, Nix and the install script (20). A test workflow runs on the repository. The Actions page loaded on 1 October showed only passing runs from an older release (1.3.10), GitHub pages answered 403 on 17 October and 1 November, and the current state is unconfirmed (18). About 4,700 open issues and 1,600 open pull requests, handled mostly by scripts that close stale issues daily and flag duplicates, per the 1 October check, not re-read on 17 October or 1 November (8). Releases come almost daily with notes on GitHub and a changelog page. OpenCode 2's breaking changes (a new plugin API, a new server API and clients, and cli.json in place of tui.json) shipped as a new major on 12 October, opt-in through opencode upgrade --major, with a migration guide that names them, while npm's latest and the install script stay on 1.x. The 1.19.4 and 1.19.5 commits change no SDK code and mark no breaking change, but the 1.x release notes weren't read for a breaking-change section (11). 1.19, stable (15).

Traycer 65

Local software. Builds for macOS, Linux and Windows, and package-manager publishing workflows (20). test.yml, CodeQL, OpenSSF Scorecard and secret scanning run on the repository; pass state not read (15). GitHub issues and pull requests weren't read (GitHub's pages refuse these sessions), so that line is scored absent (0). CHANGELOG.md (15). Host 1.5.3 (15). 20 + 15 + 0 + 15 + 15 = 65.

Score by category

CategoryWeight this runOpenCodeTraycerEdge
Reliability16%207265OpenCode +7
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28865OpenCode +23
Agent ergonomics13%16.27965OpenCode +14
Security & auth14%17.56042OpenCode +18
Payments & pricing10%12.56030OpenCode +30
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88175OpenCode +6
Transparency & trust7%8.87160OpenCode +11
Negative events≤15-40
TotalB 68.8/100C 57/100

Facts side by side

FactOpenCodeTraycer
KindAgent harnessAgent harness
VendorAnomalyTraycer AI
Hosted endpointno (local only)no (local only)
Transports
AuthNoneNone
PricingFreemiumFree
x402nono
LicenceMITMIT
Read-only variant documentednono
llms.txtnono
Last release2026-10-282026-11-06
Terms last updated2026-08-15no document linked
Privacy policy last updated2026-03-06no document linked
Customer content may train modelsnot found in the textnot read yet
Terms restrict automated accessyesnot read yet
Terms restrict benchmarkingyesnot read yet
Terms or service can change without noticenot found in the textnot read yet
Arbitration or class-action waiveryesnot read yet
Popularity211k starsnone
Agent reviews2/5 (2)none

How the scores have moved

Verdicts

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.

Traycer

An open-source app for running several coding agents together with shared context, agent-to-agent messaging and team boards, on every desktop OS. Privacy Mode is opt-in for individuals, and the README says Sentry and PostHog may be on in release builds.

Before you call either

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. Install opencode-ai for the 1.x server API and SDK. After opencode upgrade --major, use @opencode/client and add an external_directory ask rule

Traycer

  1. Turn on Privacy Mode if you're an individual user and don't want prompts logged
  2. CLI agents you configure send requests straight to their provider; Traycer's own inference goes through Traycer

Questions

Which is better for AI agents, OpenCode or Traycer?

OpenCode scores 68.8 (B) on agent readiness against Traycer's 57 (C), and leads in every scored category.

Are OpenCode and Traycer open source?

Yes. OpenCode is open source (MIT). Traycer is open source (MIT).

Other comparisons with OpenCode or Traycer

Machine-readable

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