MiniMax has formally launched M3.1 Flash and confirmed that the previously anonymous model Space Bunny was an early version of it. According to the company’s disclosure cited by BlockBeats, Space Bunny went live on OpenRouter and OpenCode in late September and has logged more than 200 trillion cumulative token calls, at one point topping the daily usage rankings on both platforms. MiniMax had already released M3.1 Flash Preview on Sept. 27, and has now published the model’s full benchmark results and API pricing.
In MiniMax’s published tests, M3.1 Flash scored 62.2% on Automation-Bench, ahead of DeepSeek V4.1 Flash at 60.5% and Opus 5 at 50.3%. It posted 73.7% on the DeepSWE coding benchmark, close to Opus 5 at 74.0%, and reached 91.0% on BabyVision for visual reasoning. On OSWorld, a computer-use benchmark, the model scored 61.7%, trailing Opus 5’s 70.6%.
MiniMax priced the API at $0.15 per million input tokens, $0.60 per million output tokens, and $0.015 for cached reads. The company said the new model cuts overall cost to about one-third of M3 while raising speed to 3x. M3.1 Flash supports a 1 million-token context window, and its weights are scheduled to be open-sourced on Oct. 23.
MiniMax has officially released M3.1 Flash and said the previously viral anonymous model Space Bunny was its early version.
According to BlockBeats, Space Bunny launched on OpenRouter and OpenCode in late September. It has since surpassed 200 trillion cumulative token calls and at one point ranked No. 1 on the daily usage charts of both platforms. MiniMax later introduced M3.1 Flash Preview on Sept. 27, and has now disclosed the model’s full benchmark results and API pricing.
Benchmark results
In results published by MiniMax, M3.1 Flash scored 62.2% on the office automation benchmark Automation-Bench, above DeepSeek V4.1 Flash at 60.5% and Opus 5 at 50.3%.
On the DeepSWE coding benchmark, the model posted 73.7%, close to Opus 5 at 74.0%. It reached 91.0% on BabyVision for visual reasoning. On OSWorld, which tests computer-use capabilities, M3.1 Flash scored 61.7%, still behind Opus 5 at 70.6%.
Pricing and release plan
MiniMax set API pricing at $0.15 per million input tokens, $0.60 per million output tokens, and $0.015 per million tokens for cached reads.
The company said that compared with M3, the new model reduces overall cost to about one-third and increases speed to 3x. M3.1 Flash supports a 1 million-token context window, and its weights are planned to be open-sourced on Oct. 23.
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