Model comparison

MiMo-V2.6-Pro vs Step 3.5 Flash

MiMo-V2.6-Pro is the stronger model overall, scoring 46.7 to 41.7 on the Noometry Index. Step 3.5 Flash costs 3.6× less per token, which makes it the better buy when MiMo-V2.6-Pro's lead doesn't matter for your workload.

Last verified October 10, 2026. 12 shared benchmarks.

MiMo-V2.6-Pro Xiaomi

46.7

Rank #55 Confirmed

Step 3.5 Flash

StepFun

41.7

Rank #116 Confirmed

Summary

They share 12 benchmarks with published results for both. MiMo-V2.6-Pro scores higher in 7 categories and Step 3.5 Flash in 1 category; 8 gaps are clear of the uncertainty.
The widest gap is in coding, where MiMo-V2.6-Pro leads 53.2 to 41.7.
Step 3.5 Flash is cheaper at $0.10 / $0.30 per million input/output tokens, against $0.43 / $0.87 for MiMo-V2.6-Pro.
MiMo-V2.6-Pro accepts more context: 1.05M tokens versus 256K.

Side by side

MiMo-V2.6-Pro and Step 3.5 Flash specifications
	MiMo-V2.6-Pro	Step 3.5 Flash
Provider	Xiaomi	StepFun
Noometry Index	46.7	41.7
Released	2026-09-22	2026-01-29
Weights	Open	Open
Context window	1.05M	256K
Max output	131K	256K
Input $ / M tokens	$0.43	$0.10
Output $ / M tokens	$0.87	$0.30
Results tracked	14	19

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Category by category

Coding MiMo-V2.6-Pro leads

MiMo-V2.6-Pro: 53.2 (#27), Step 3.5 Flash: 41.7 (#106)

Coding benchmarks
Benchmark	MiMo-V2.6-Pro	Step 3.5 Flash
LMArena Coding	1538	1436
LMArena WebDev	1618	—

Reasoning MiMo-V2.6-Pro leads

MiMo-V2.6-Pro: 30.4 (#76), Step 3.5 Flash: 21.2 (#202)

Reasoning benchmarks
Benchmark	MiMo-V2.6-Pro	Step 3.5 Flash
LMArena Hard Prompts	1511	1411
NYT Connections (extended)	—	28.4%

Math Step 3.5 Flash leads

MiMo-V2.6-Pro: 37.9 (#91), Step 3.5 Flash: 40.6 (#77)

Math benchmarks
Benchmark	MiMo-V2.6-Pro	Step 3.5 Flash
LMArena Math	1497	1408
MathArena Final-Answer Competitions	—	66.8%

Knowledge MiMo-V2.6-Pro leads

MiMo-V2.6-Pro: 43.0 (#85), Step 3.5 Flash: 39.0 (#127)

Knowledge benchmarks
Benchmark	MiMo-V2.6-Pro	Step 3.5 Flash
LMArena Expert	1548	1422

Multimodal Not comparable

MiMo-V2.6-Pro: 40.2 (#40), Step 3.5 Flash: —

Multimodal benchmarks
Benchmark	MiMo-V2.6-Pro	Step 3.5 Flash
LMArena Vision	1265	—

Multilingual MiMo-V2.6-Pro leads

MiMo-V2.6-Pro: 57.0 (#15), Step 3.5 Flash: 50.7 (#115)

Multilingual benchmarks
Benchmark	MiMo-V2.6-Pro	Step 3.5 Flash
LMArena Non-English	1474	1386
LMArena Chinese	1532	1448
LMArena Russian	1481	1385
LMArena French	—	1421
LMArena German	—	1404
LMArena Japanese	—	1353
LMArena Korean	—	1350
LMArena Spanish	—	1419

Instruction Following MiMo-V2.6-Pro leads

MiMo-V2.6-Pro: 78.2 (#10), Step 3.5 Flash: 73.3 (#119)

Instruction Following benchmarks
Benchmark	MiMo-V2.6-Pro	Step 3.5 Flash
LMArena Instruction Following	1490	1385

Long Context MiMo-V2.6-Pro leads

MiMo-V2.6-Pro: 46.0 (#26), Step 3.5 Flash: 42.8 (#112)

Long Context benchmarks
Benchmark	MiMo-V2.6-Pro	Step 3.5 Flash
LMArena Longer Query	1500	1402

Writing & Preference MiMo-V2.6-Pro leads

MiMo-V2.6-Pro: 66.9 (#32), Step 3.5 Flash: 59.0 (#108)

Writing & Preference benchmarks
Benchmark	MiMo-V2.6-Pro	Step 3.5 Flash
LMArena Text	1491	1403
LMArena Creative Writing	1465	1357
LMArena Multi-Turn	1463	1405

Frequently asked questions

Is MiMo-V2.6-Pro better than Step 3.5 Flash?

Which is cheaper, MiMo-V2.6-Pro or Step 3.5 Flash?

Step 3.5 Flash is cheaper. It lists at $0.10 per million input tokens and $0.30 per million output tokens; MiMo-V2.6-Pro lists at $0.43 and $0.87.

Is MiMo-V2.6-Pro or Step 3.5 Flash better for coding?

MiMo-V2.6-Pro scores higher on coding benchmarks: 53.2 versus 41.7 in the Noometry coding category.

Which has the bigger context window?

MiMo-V2.6-Pro does, with 1.05M tokens against 256K.

How many benchmarks do MiMo-V2.6-Pro and Step 3.5 Flash share?

12 benchmarks have published results for both models. MiMo-V2.6-Pro has 14 scored results on Noometry and Step 3.5 Flash has 19.