OpenCode vs Reason
OpenCode vs Reason (Coding Agents (CLI & Cloud)). Agent test scores: OpenCode 9.2/10, Reason 8.6/10. OpenCode scored 0.6 higher overall in our separate rubric v0.1 tests (editions and tasks can differ — see Edition tested and the notes below). Pricing: OpenCode — Go $10/mo; Go Plus $40/mo; Zen pay-as-you-go ($20 prepaid); Reason — Free plan (no included agent quota; bring your own model key or buy credits); Pro $20/mo with a 7-day trial; Max $200/mo (seen in the app, 2026-10-17).
Every fact on this page comes from our tool records and test logs. Last updated:
- VibeToolRank score
- 9.2/10
- Last tested
- 2026-10-16
- Runs
- 3 runs
- Outcome score
- 9/10
- Edition tested
- OpenCode CLI 1.19.2, free Zen model opencode/big-pickle, no account
- Free plan, as measured
- $0 per bugfix run on a free OpenCode Zen model, no account or API key
- Free plan
- Yes: open-source agent free with own keys; some free Zen models
- Price
- Go $10/mo; Go Plus $40/mo; Zen pay-as-you-go ($20 prepaid)
- Pricing checked
- 2026-10-16
- VibeToolRank score
- 8.6/10
- Last tested
- 2026-10-18
- Runs
- 3 runs
- Outcome score
- 8/10
- Edition tested
- Reason Agent 1.10 (cloud API), Free plan, scratch sessions with our OpenRouter key on the free model cohere/north-mini-code:free
- Free plan, as measured
- About 84-126K input and 2-4K output tokens per bugfix run, $0 on a free OpenRouter model (12 OpenRouter free requests for 3 runs)
- Free plan
- Partly: the Free plan includes no agent runs (our API check showed the quota exhausted at zero usage); you can bring your own model API key. Reason Network is free.
- Price
- Free plan (no included agent quota; bring your own model key or buy credits); Pro $20/mo with a 7-day trial; Max $200/mo (seen in the app, 2026-10-17)
- Pricing checked
- 2026-10-17
Side by side
| Field | OpenCode | Reason |
|---|---|---|
| What it is | OpenCodeOpen-source AI coding agent for the terminal. | ReasonAutonomous cloud coding agent for GitHub that opens pull requests; its new Reason Network lets your coding agents talk to each other. |
| Pricing | OpenCodeGo $10/mo; Go Plus $40/mo; Zen pay-as-you-go ($20 prepaid) | ReasonFree plan (no included agent quota; bring your own model key or buy credits); Pro $20/mo with a 7-day trial; Max $200/mo (seen in the app, 2026-10-17) |
| Free tier | OpenCodeYes: open-source agent free with own keys; some free Zen models | ReasonPartly: the Free plan includes no agent runs (our API check showed the quota exhausted at zero usage); you can bring your own model API key. Reason Network is free. |
| Pricing verified | OpenCode2026-10-16 | Reason2026-10-17 |
| Edition tested | OpenCodeOpenCode CLI 1.19.2, free Zen model opencode/big-pickle, no account | ReasonReason Agent 1.10 (cloud API), Free plan, scratch sessions with our OpenRouter key on the free model cohere/north-mini-code:free |
| Tested on | OpenCode2026-10-16 | Reason2026-10-18 |
| Outcome score | OpenCode9 | Reason8 |
| Speed score | OpenCode10 | Reason10 |
| Cost score | OpenCode10 | Reason10 |
| Developer experience score | OpenCode7 | Reason6 |
| Reliability score | OpenCode10 | Reason10 |
| Overall score | OpenCode9.2 | Reason8.6 |
What our tests found
OpenCode
3/3 runs: fixed a seeded cart-discount bug (2 failing tests) in 18-22s with a free Zen model and no account or API key, without touching the tests. Only task T3 was run. In scripts, opencode run hangs silently if stdin is left open.CLI, free model
- Solved our bug-fix task 3/3 in about 20s
- Free Zen models work with no account or API key
- Minimal, correct diffs that left the tests untouched
- opencode run hung silently in a script until stdin was redirected from /dev/null
- Free model names and availability change over time
- We only ran the bug-fix task (T3), not full app builds
Who it’s for: Developers who want an open-source terminal coding agent they can try for free and later point at their own model keys.
Reason
3/3 runs fixed our seeded cart bug (4/4 tests pass) in 20-36s of agent time with a free OpenRouter model, $0. On the Free plan the agent's cloud computer doesn't start, so it can't run tests or edit a repo itself; it returned the fixed file and we applied it.cloud free plan
- Fixed the seeded bug correctly in 3 of 3 runs, in 20-36 seconds
- Lets you bring your own model key and pin a free OpenRouter model, so our test cost $0
- The API reports outcome, cost and token usage for every session
- On the Free plan the cloud computer won't start, so the agent can't run tests, edit a repo or open a PR
- The agent kept retrying tools on the missing machine, using 84-126k input tokens for a 7-line fix
- The session's result field is truncated; the full answer is only in the events log
Who it’s for: Developers who want a cloud agent to work GitHub issues and coordinate with Claude Code, Codex and teammates' agents.
Verdict
Scores use rubric v0.1 from separate runs. Editions and tasks can differ (see Edition tested and What our tests found); some tests were a single run, which caps reliability scores. Overall: OpenCode 9.2, Reason 8.6. Check the free-tier limits above against your project before choosing.
FAQ
Which is better, OpenCode or Reason?
In our tests OpenCode scored higher overall (9.2/10 vs 8.6/10). Scores use the same rubric (v0.1) but came from separate runs; editions and tasks may differ (see Edition tested and test summaries), so check the per-dimension scores for what matters to you.
Is OpenCode free?
Yes: open-source agent free with own keys; some free Zen models (pricing checked 2026-10-16).
Is Reason free?
Partly: the Free plan includes no agent runs (our API check showed the quota exhausted at zero usage); you can bring your own model API key. Reason Network is free. (pricing checked 2026-10-17).
How much does OpenCode cost compared with Reason?
OpenCode: Go $10/mo; Go Plus $40/mo; Zen pay-as-you-go ($20 prepaid). Reason: Free plan (no included agent quota; bring your own model key or buy credits); Pro $20/mo with a 7-day trial; Max $200/mo (seen in the app, 2026-10-17).
Best Coding Agents (CLI & Cloud) · Best free Coding Agents (CLI & Cloud) · All comparisons · Methodology
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- Memdoor — 9.1/10
- OpenHands — 9.1/10
- Zerg Client — 9.1/10
- Amp — 9/10
- Alysis Code — 8.4/10
- Harness (Autonomous) — 8.4/10
- Jules — 8/10
- OpenAI Codex — 7.4/10
- Gemini CLI — 6.1/10
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Best Coding Agents (CLI & Cloud) · Best free Coding Agents (CLI & Cloud)
Scores come from our own tests and are never for sale; sponsored placements are always labelled. Some links are affiliate links (currently Railway). Disclosure