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MiMo-V2.6-Pro vs Step-3.5-Flash

MiMo-V2.6-Pro leads the LLM Stats Score 49.8 to 37.2. Step-3.5-Flash is 3.1x cheaper per token.

Xiaomi · StepFun · Updated for 2026

Which is better?

MiMo-V2.6-Pro leads the overall LLM Stats Score 49.8 to 37.2, ranking #19 overall.

On price, Step-3.5-Flash is roughly 3.1x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

MiMo-V2.6-Pro also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose MiMo-V2.6-Pro

  • overall performance matters — it scores 49.8 and ranks #19 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Sep 2026

Choose Step-3.5-Flash

  • cost matters — it's about 3.1x cheaper per token

At a glance

The differences that matter most.

MiMo-V2.6-Pro
Xiaomi
Step-3.5-Flash
StepFun
Core performance indexes
LLM Stats Score
49.8
#19
37.2
#72
Reasoning
45.2
#30
37.2
#71
Coding
41.8
#9
20.5
#99
Agents
37.5
#13
15.3
#88
Cost, coverage & limits
Benchmark wins
—
—
Input price
$0.43 / M
$0.10 / M
Output price
$0.87 / M
$0.40 / M
Context window
1,048,576
65,536

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
MiMo-V2.6-Pro
Step-3.5-Flash
Tool use
28.0#21
13.3#98
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

18 reported for MiMo-V2.6-Pro · 7 for Step-3.5-Flash

No common benchmarks found

MiMo-V2.6-Pro and Step-3.5-Flashdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Step-3.5-Flash costs less

For input processing, MiMo-V2.6-Pro ($0.43/1M tokens) is 4.3x more expensive than Step-3.5-Flash ($0.10/1M tokens).

For output processing, MiMo-V2.6-Pro ($0.87/1M tokens) is 2.2x more expensive than Step-3.5-Flash ($0.40/1M tokens).

In conclusion, MiMo-V2.6-Pro is more expensive than Step-3.5-Flash.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Tue Sep 22 2026 • llm-stats.com
Xiaomi
MiMo-V2.6-Pro
Input tokens$0.43
Output tokens$0.87
Best providerXiaomi
StepFun
Step-3.5-Flash
Input tokens$0.10
Output tokens$0.40
Best providerStepFun
Notice missing or incorrect data?Start an Issue→

Model Size

Parameter count comparison

824.0B diff

MiMo-V2.6-Pro has 824.0B more parameters than Step-3.5-Flash, making it 420.4% larger.

Xiaomi
MiMo-V2.6-Pro
1.0Tparameters
StepFun
Step-3.5-Flash
196.0Bparameters
1020.0B
MiMo-V2.6-Pro
196.0B
Step-3.5-Flash

Context Window

Maximum input and output token capacity

MiMo-V2.6-Pro accepts 1,048,576 input tokens compared to Step-3.5-Flash's 65,536 tokens. Only Step-3.5-Flash specifies output context (8,192 tokens).

Xiaomi
MiMo-V2.6-Pro
Input1,048,576 tokens
Output- tokens
StepFun
Step-3.5-Flash
Input65,536 tokens
Output8,192 tokens
Tue Sep 22 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

MiMo-V2.6-Pro supports multimodal inputs, whereas Step-3.5-Flash does not.

MiMo-V2.6-Pro can handle both text and other forms of data like images, making it suitable for multimodal applications.

MiMo-V2.6-Pro

Text
Images
Audio
Video

Step-3.5-Flash

Text
Images
Audio
Video

License

Usage and distribution terms

MiMo-V2.6-Pro is licensed under MIT, while Step-3.5-Flash uses Apache 2.0.

License differences may affect how you can use these models in commercial or open-source projects.

MiMo-V2.6-Pro

MIT

Open weights

Step-3.5-Flash

Apache 2.0

Open weights

Release Timeline

When each model was launched

MiMo-V2.6-Pro was released on 2026-09-22, while Step-3.5-Flash was released on 2026-02-02.

MiMo-V2.6-Pro is 8 months newer than Step-3.5-Flash.

MiMo-V2.6-Pro

Sep 22, 2026

0 days ago

7mo newer
Step-3.5-Flash

Feb 2, 2026

7 months ago

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

MiMo-V2.6-Pro is available from Xiaomi. Step-3.5-Flash is available from StepFun.

MiMo-V2.6-Pro

xiaomi logo
Xiaomi
Input Price:Input: $0.43/1MOutput Price:Output: $0.87/1M

Step-3.5-Flash

stepfun logo
StepFun
Input Price:Input: $0.10/1MOutput Price:Output: $0.40/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against MiMo-V2.6-Pro and Step-3.5-Flash side-by-side, then vote on the output you prefer.

MiMo-V2.6-Pro
✓ Preferred
Step-3.5-Flash
Open in Playground

FAQ

Common questions about MiMo-V2.6-Pro vs Step-3.5-Flash.

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

MiMo-V2.6-Pro leads the LLM Stats Score 49.8 to 37.2. MiMo-V2.6-Pro is made by Xiaomi and Step-3.5-Flash is made by StepFun. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does MiMo-V2.6-Pro compare to Step-3.5-Flash in benchmarks?

MiMo-V2.6-Pro scores CyberGym: 94.0%, Terminal-Bench 2.1: 89.9%, OSWorld-Verified: 82.0%, MiMo Cyber Bench: 81.7%, Toolathlon-Verified: 76.9%. Step-3.5-Flash scores AIME 2025: 97.3%, Tau-bench: 88.2%, LiveCodeBench v6: 86.4%, IMO-AnswerBench: 85.4%, SWE-Bench Verified: 74.4%.

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

Step-3.5-Flash is 4.3x cheaper for input tokens. MiMo-V2.6-Pro costs $0.43/M input and $0.87/M output via xiaomi. Step-3.5-Flash costs $0.10/M input and $0.40/M output via stepfun.

What are the context window sizes for MiMo-V2.6-Pro and Step-3.5-Flash?

MiMo-V2.6-Pro supports 1.0M tokens and Step-3.5-Flash supports 66K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between MiMo-V2.6-Pro and Step-3.5-Flash?

Key differences include LLM Stats Score (49.8 vs 37.2), context window (1.0M vs 66K), input pricing ($0.43 vs $0.10/M), multimodal support (yes vs no), licensing (MIT vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes MiMo-V2.6-Pro and Step-3.5-Flash?

MiMo-V2.6-Pro is developed by Xiaomi and Step-3.5-Flash is developed by StepFun.

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