MiniMax M3.1 Flash in practice: tests and comparisons with DeepSeek V4.1 Flash

On 5 small coding tasks with hidden tests run 15 times each in OpenCode Go, space-bunny passed 15/15 at $0.022 API-equivalent versus claude-sonnet-5-5's 15/15 at $2.435; hard tasks untested.

A community auto-research project reports that the free Space Bunny Max model submitted best bounds for integer multiplication four times in a row, restoring a one-PR-per-minute pace.

The free Space Bunny model on OpenCode submitted a best-known bound for integer multiplication (κ=0.0017334…), prompting discussion of using free models to explore new solution spaces and frontier models to verify.

The free Space Bunny Max model in OpenCode proposed a new bound for integer multiplication, with Claude Opus 5.5 helping verify and push the PR.

A user ranks the best free models in OpenCode (zen): GLM-5.3-Flash, MiMo-V2.6-Flash, Space Bunny (the anonymous M3.1 Flash), Beam, then Nemotron 3.5 Super VL.

A user complains that Space Bunny, the anonymous M3.1 Flash build, spent five hours on an app in OpenCode with no discernible difference and appeared to hardcode a D:\Windows path.

A developer says they were using Space Bunny in OpenCode but switched to DeepSeek as soon as it became available, without giving specific reasons or test data.

Testing M3.1 Flash in the redesigned MiniMax Code, the author saw it find the real bug instead of patching around it, refuse to pad weak results, write its own tests to 12/12 green, and mark things UNVERIFIED.

A user claims MiniMax was good before Space Bunny but now seems average, and calls MissingNo trash after trying it.

The author tests M3.1 Flash Preview with particle effects, SVG cameras and black hole simulations, finding its grasp of spatial relations and visual composition strong for a Flash model.

A user runs custom advanced tasks on M3.1 Flash Preview, saying particle effects, SVG cameras and black hole visuals all look decent and the generated motion video holds up.

The author ran custom evaluation tasks on M3.1 Flash Preview and found it underrated, with impressive particle animations and strong results on SVG camera, black hole and motion-video tasks, shown in a video.