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

A developer reports these models are frontier-level for everyday tasks and swaps to M3.1 and others whenever Claude or GPT hits quota limits.

On the same prompt in Claude Code, Opus 5.5 on Ultracode took 6 hours while MiniMax M3.1 Flash finished in 17 minutes, though the author says the quality gap is clear.

A side-by-side video comparing MiniMax M3.1 Flash with Claude Opus 5.5, asking whether open source is catching up.

A video compares MiniMax M3.1 Flash with Claude Opus 5.5, with the author concluding Opus 5.5 remains hard to match.

Hands-on: dumping 50 past posts into the 1M context at max effort produced a 30-day calendar, hook bank and analyzer for roughly 1.5M input and 300K output tokens, under $0.50 at API prices.

Building an AI task-bill calculator from scratch plus a follow-up round, all three passed tests while Flash cost about 1/19 of Opus and 1/48 of Astra.

The author pairs Opus 5.5 for planning with MiniMax M3.1 Flash for execution inside the Claude Code harness.

A user had Claude Code call MiniMax M3.1 Flash to generate a 3D whale breaching scene for $0.25, claiming roughly 8x cheaper than Astra and Sol and cheaper than DeepSeek Flash.

Asked M3.1 Flash to generate a Frieren SVG from a reference with self-chosen background music; in Claude Code ultracode mode it took 1h50m and 70M tokens, free via MiniMax plans, and beat expectations.

A hands-on test used Claude Code with MiniMax M3.1 Flash to generate a whale breach 3D scene for about $0.25, reportedly ~8x cheaper than Astra/Sol and better than GPT 6.1 Sol.

A short image post claims MiniMax M3.1 Flash looks distilled from Claude Code, with the author admitting he has no evidence.

One run each on the same three.js scene: Claude Fable 5.1 took 10:21 for $2.82, GPT-6 Astra 1:44 for $0.53, while M3.1 Flash hit the 30-minute cap still refining at $0.18 without finishing.