DeepSeek Harness vs OpenCode — OpenCode vs DeepSeek Harness: 3 side-by-side tests
3 posts from X ran DeepSeek Harness and OpenCode on the same task, between Oct 19, 2026 and Oct 21, 2026. Models: DeepSeek V4.1 Flash 1017, GPT-6 Luna, Claude Haiku 5.5, MiniMax M3.1 Flash. All harness comparisons.
- Author picks: 1 post of 3 name a winner between the two — DeepSeek Harness 1, OpenCode 0.
- 2 posts state a time for both: DeepSeek Harness was faster in both, median gap ~3.1×.
- 1 post states a cost for both: DeepSeek Harness was cheaper in it, by ~1.7×.
- 1 of 3 keeps the model fixed (DeepSeek V4.1 Flash 1017); in the rest each side ran its own model, so harness and model effects are mixed.
From 3 posts; costs and times as stated by each author, not a controlled benchmark.
Posts
3
DeepSeek Harness vs OpenCode, test by test
| Test | DeepSeek Harness: model | OpenCode: model | Time (DeepSeek Harness / OpenCode) | Cost (DeepSeek Harness / OpenCode) | Author’s pick |
|---|---|---|---|---|---|
| GPU showcase website from given image assets, four models@VulKan42069 | DeepSeek V4.1 Flash 1017 (Max) | MiniMax M3.1 Flash (Max) | 34 min / 2 h 28 min | — | — |
| DeepSeek 1017 in DeepSeek Harness vs OpenCode@beyondwudan | DeepSeek V4.1 Flash 1017 (max) | DeepSeek V4.1 Flash 1017 (max) | 1 h 57 min / 3 h 33 min | $0.72 / $1.22 | — |
| Spaceship over a planet, DeepSeek 1017 vs MiniMax@beyondwudan | DeepSeek V4.1 Flash 1017 (Max) | MiniMax M3.1 Flash (Max) | — / 4 h | — | DeepSeek Harness |
Numbers are as each post states them; “—” means the post gives none. Tests and models differ from row to row.
API list prices of the models in these tests
| Model | Used with | Input $/1M tokens | Output $/1M tokens |
|---|---|---|---|
| DeepSeek V4.1 Flash 1017 | DeepSeek Harness, OpenCode | $0.30peak hours; off-peak is half price | $1.20peak hours; off-peak is half price |
| MiniMax M3.1 Flash | OpenCode |
Official API list prices where verified; a blank cell has no verified official price in the archive (older or retired models).
What each test showed
Unless a test says both sides ran the same model, each side ran its own model — not a controlled comparison of the harnesses alone.
GPU showcase website from given image assets, four models — DeepSeek V4.1 Flash 1017 (Max) in DeepSeek Harness vs MiniMax M3.1 Flash (Max) in OpenCode
DeepSeek V4.1 Flash 1017, GPT-6 Luna, Claude Haiku 5.5 and MiniMax M3.1 Flash, all on Max, each build a showcase website for the author’s graphics card from the same image assets. The post also includes OpenAI Codex and Claude Code.
- DeepSeek Harness with DeepSeek V4.1 Flash 1017 at Max effort: time 34 min — Top left.
- OpenAI Codex with GPT-6 Luna at Max effort: time 3.3 min — Top right.
- Claude Code with Claude Haiku 5.5 at Max effort: time 36.3 min — Bottom left.
- OpenCode with MiniMax M3.1 Flash at Max effort: time 2 h 28 min — Bottom right; the author says it had the site done at about 34 min and kept fixing small things.
As stated: DeepSeek V4.1 Flash 1017 33 min 58 s; GPT-6 Luna 3 min 19 s; Claude Haiku 5.5 36 min 19 s; MiniMax M3.1 Flash 2 h 28 min.
Note: No winner named.
Posted Oct 21, 2026 by VulKan (@VulKan42069). Post on X · Video and details
DeepSeek 1017 in DeepSeek Harness vs OpenCode — DeepSeek V4.1 Flash 1017 (max) in DeepSeek Harness vs DeepSeek V4.1 Flash 1017 (max) in OpenCode
DeepSeek V4.1 Flash at max runs the same build in DeepSeek Harness (top) and OpenCode (bottom). DeepSeek Harness took 1h57m, 134.7M tokens and $0.72; OpenCode took 3h33m, 143.9M tokens and $1.22. Both sides ran DeepSeek V4.1 Flash 1017, so this one isolates the harness.
- DeepSeek Harness with DeepSeek V4.1 Flash 1017 at max effort: time 1 h 57 min, cost $0.72 — Top: 99.8% cache, ~69 avg tokens/s.
- OpenCode with DeepSeek V4.1 Flash 1017 at max effort: time 3 h 33 min, cost $1.22 — Bottom: 98.1% cache, ~57 avg tokens/s.
As stated: DeepSeek Harness 1h57m, 134.7M tokens, $0.72; OpenCode 3h33m, 143.9M tokens, $1.22.
Note: Numbers only; no winner named.
Posted Oct 19, 2026 by abhinav (@beyondwudan). Post on X · Video and details
Spaceship over a planet, DeepSeek 1017 vs MiniMax — DeepSeek V4.1 Flash 1017 (Max) in DeepSeek Harness vs MiniMax M3.1 Flash (Max) in OpenCode
DeepSeek V4.1 Flash 1017 at Max in DeepSeek Harness (top) and MiniMax M3.1 Flash at Max in OpenCode (bottom) build a space scene with a ship flying over a planet. The author says MiniMax took 4 hours.
- DeepSeek Harness with DeepSeek V4.1 Flash 1017 at Max effort — Top. Author’s pick.
- OpenCode with MiniMax M3.1 Flash at Max effort: time 4 h — Bottom.
Verdict from @beyondwudan: MiniMax took 4 hours and still got beaten by DeepSeek 1017 (paraphrased).
Posted Oct 19, 2026 by abhinav (@beyondwudan). Post on X · Video and details
DeepSeek Harness vs OpenCode (OpenCode vs DeepSeek Harness): FAQ
Is DeepSeek Harness better than OpenCode?
Author picks: 1 post of 3 name a winner between the two — DeepSeek Harness 1, OpenCode 0. Each post is a different task, so watch the outputs above for the kind of work you do.
Which is faster, DeepSeek Harness or OpenCode?
DeepSeek Harness, going by the posts' own numbers: it was faster in 2 of the 2 posts that give a time for each side (median gap ~3.1×). Times are as each author states them; models and settings differ.
Which is cheaper, DeepSeek Harness or OpenCode?
DeepSeek Harness, going by the posts' own numbers: it was cheaper in the one post that gives a cost for each side (by ~1.7×). Those are the run costs the posts state.
Did any test run the same model in DeepSeek Harness and OpenCode?
Yes, in 1 of the 3: DeepSeek 1017 in DeepSeek Harness vs OpenCode (@beyondwudan) ran DeepSeek V4.1 Flash 1017 on both sides. The others pair each harness with a different model.
Which models were used with DeepSeek Harness and OpenCode?
With DeepSeek Harness: DeepSeek V4.1 Flash 1017. With OpenCode: MiniMax M3.1 Flash, DeepSeek V4.1 Flash 1017.