MiMo-V2.6-Pro vs Gemini 3.1 Pro Preview

  • MiMo-V2.6-Pro rates higher on LMArena’s text leaderboard: 1491 against 1480.
  • MiMo-V2.6-Pro is cheaper: $0.43 / $0.87 per million input / output tokens, against $2 / $12 for Gemini 3.1 Pro Preview.
  • MiMo-V2.6-Pro has the longer context window: 1.1M tokens against 1M.
  • On the 6 Vals AI benchmarks both have taken, MiMo-V2.6-Pro wins 5 and Gemini 3.1 Pro Preview wins 1 (MiMo-V2.6-Pro: Terminal-Bench 4.0, Vibe Code Bench, Tax Agent Bench).
LMArena text rating over time
14701480149015001510Feb 26Apr 26Jun 26Aug 26Oct 26
LatestMiMo-V2.6-Pro 1491Gemini 3.1 Pro Preview 1480

Side by side

Models (2/6)
  • MiMo-V2.6-Pro
  • Gemini 3.1 Pro Preview
BenchmarkMiMo-V2.6-ProGemini 3.1 Pro Preview
The model
LabXiaomiGoogle
Released2026-09-212026-02-19
WeightsOpenProprietary
Context window1.1M1M
Input, per 1M tokens$0.43$2
Output, per 1M tokens$0.87$12
LMArena, people’s votes
LMArena TextMillions of people compare two anonymous models side by side and vote for the better answer1491#11 of 3511480#19 of 351
LMArena WebDevPeople ask two anonymous models to build the same web app, try both and vote for the better one1625#23 of 1241447#78 of 124
LMArena VisionSide-by-side votes on prompts that include an image1263#53 of 1461296#22 of 146
LMArena CodingLMArena’s text votes on prompts that ask for code1533#5 of 3461484#48 of 346
LMArena MathLMArena’s text votes on math prompts1500#16 of 3391486#28 of 339
LMArena Creative writingLMArena’s text votes on stories, poems and other creative writing1466#20 of 3491482#14 of 349
LMArena Hard promptsLMArena’s text votes on the hardest prompts1511#8 of 3511485#30 of 351
LMArena Instruction followingLMArena’s text votes on prompts with specific instructions to follow1491#12 of 3511466#35 of 351
Vals AI, overall
Vals IndexVals AI’s headline score57.81%#14 of 27—
Vals AI, coding
Terminal-Bench 4.0Frontier-difficulty tasks an agent completes in a real terminal31.31%#21 of 552.52%#49 of 55
SWE-benchReal GitHub issues from open-source projects—78.80%#28 of 85
Vibe Code BenchBuilding complete web apps from a plain-language brief, graded on whether the app works85.22%#15 of 11532.03%#72 of 115
Code MigrationRewriting working programs in a new language, graded on whether the new program still passes its tests48.79%#16 of 28—
LiveCodeBenchFresh competitive programming problems, collected after models’ training cut-offs to avoid contamination—88.48%#6 of 143
Vals AI, finance
Finance AgentThe core tasks of a financial analyst, done as an agent with research tools64.26%#10 of 31—
Finance IndexVals AI’s composite of finance tasks57.85%#12 of 31—
Tax Agent BenchAgentic research into US corporate tax questions32.39%#19 of 769.29%#62 of 76
Vals AI, law
Legal IndexVals AI’s composite of legal tasks72.14%#8 of 28—
Legal Research BenchAgentic US legal research47.12%#15 of 8520.67%#62 of 85
Vals AI, medicine
MedCodeAssigning the right medical billing codes from clinical notes44.97%#39 of 10759.06%#2 of 107
MedQAMedical licensing exam questions, measured on accuracy and on robustness to bias—96.37%#3 of 92
Vals AI, reasoning
GPQA DiamondGraduate-level questions in biology, physics and chemistry that experts answer well and search does not—95.45%#1 of 138
MMLU-ProHarder, reasoning-focused multiple choice across 14 subjects, from law to engineering—90.99%#4 of 138
AIMEProblems from the American Invitational Mathematics Examination, a qualifier for the US Math Olympiad—98.13%#1 of 96
MMMUCollege-level questions that need both an image and text—88.21%#10 of 93
Terminal-Bench ScienceExpert-written scientific research workflows, run by an agent in a terminal2.86%#33 of 421.43%#35 of 42

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Questions

Which is better, MiMo-V2.6-Pro or Gemini 3.1 Pro Preview?

MiMo-V2.6-Pro rates higher on LMArena’s text leaderboard: 1491 against 1480. MiMo-V2.6-Pro is cheaper: $0.43 / $0.87 per million input / output tokens, against $2 / $12 for Gemini 3.1 Pro Preview. MiMo-V2.6-Pro has the longer context window: 1.1M tokens against 1M. On the 6 Vals AI benchmarks both have taken, MiMo-V2.6-Pro wins 5 and Gemini 3.1 Pro Preview wins 1 (MiMo-V2.6-Pro: Terminal-Bench 4.0, Vibe Code Bench, Tax Agent Bench).

Which is cheaper, MiMo-V2.6-Pro or Gemini 3.1 Pro Preview?

MiMo-V2.6-Pro is cheaper: $0.43 / $0.87 per million input / output tokens, against $2 / $12 for Gemini 3.1 Pro Preview.

Sources

Every number on this page comes from these sources; models without a published number show none. Download the data. Cite as “Nexus Explorer, nexus.inc/models”.