MiniMaxopen weightsCurrentReasoning

MiniMax M3.1 Flash

Name: MiniMax M3.1 Flash
Author: MiniMax

Cheap 1M-context agentic model, ~3x faster than M3; thinking always on (low to max). Preview in MiniMax Code from Sep 27 ('Space Bunny'), API GA Oct 19, weights on Hugging Face Oct 23, 2026. Cache hit $0.015. MiniMax reports Terminal-Bench 4.0 38.1, DeepSWE 1.1 73.7.

Released

Oct 19, 2026

Price in / out

$0.15 / $0.6

Blended $/1M

$0.262

Context

Parameters: 428B / 23B active. License: MiniMax Community.

Benchmark scoresvs MiniMax M3

Benchmark	Score	Δ vs prior	Rank (current)	Configuration	Source
Humanity's Last Exam	48%	+9.0	#12 of 36	Artificial Analysis run, no tools (2,158 text-only questions); MiniMax reports 43.4 text-only no tools · independent run	artificialanalysis.ai ↗
Artificial Analysis Intelligence Index	29	+10.0	#20 of 33	Artificial Analysis Intelligence Index v5 · independent run	artificialanalysis.ai ↗

Version

$ in / out

Terminal-Bench

SWE-bench

GPQA

HLE

AIME

τ²-bench

MiniMax M2.5Superseded

—

95.3%

MiniMax M2.7Superseded

—

48.7%

—

87%

—

89.8%

84.8%

MiniMax M3

$0.3 / $1.2

53.6%

80.5%

92.7%

39%

—

88.9%

MiniMax M3.1 Flash

$0.15 / $0.6

—

48%

—

MiniMax M3.1 Flash

Benchmark scoresvs MiniMax M3

MiniMax versions

Compare

Shipping with it?

Current open-weight peers

Version	Released	$ in / out	Terminal-Bench	SWE-bench	GPQA	HLE	AIME	τ²-bench
MiniMax M2.5Superseded	2026-02-12	—	—	—	—	—	—	95.3%
MiniMax M2.7Superseded	2026-03-18	—	48.7%	—	87%	—	89.8%	84.8%
MiniMax M3	2026-06-01	$0.3 / $1.2	53.6%	80.5%	92.7%	39%	—	88.9%
MiniMax M3.1 Flash	2026-10-19	$0.15 / $0.6	—	—	—	48%	—	—