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Ling 3.1 Flash vs Step-3.5-Flash

Ling 3.1 Flash leads the LLM Stats Score 51.0 to 37.1.

InclusionAI · StepFun · Updated for 2026

Which is better?

Ling 3.1 Flash leads the overall LLM Stats Score 51.0 to 37.1, ranking #15 overall.

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

Choose Ling 3.1 Flash

  • overall performance matters — it scores 51.0 and ranks #15 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you want the most recent training data — it shipped Sep 2026

Choose Step-3.5-Flash

  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Ling 3.1 Flash
InclusionAI
Step-3.5-Flash
StepFun
Core performance indexes
LLM Stats Score
51.0
#15
37.1
#82
Reasoning
47.5
#26
37.1
#81
Coding
38.8
#18
20.2
#109
Agents
38.0
#12
15.2
#99
Cost, coverage & limits
Benchmark wins
—
—
Input price
— / M
$0.10 / M
Output price
— / M
$0.40 / M
Context window
—
65,536

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Ling 3.1 Flash
Step-3.5-Flash
Tool use
29.0#16
13.3#108
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

11 reported for Ling 3.1 Flash · 7 for Step-3.5-Flash

No common benchmarks found

Ling 3.1 Flash 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

Model Size

Parameter count comparison

364.0B diff

Ling 3.1 Flash has 364.0B more parameters than Step-3.5-Flash, making it 185.7% larger.

InclusionAI
Ling 3.1 Flash
560.0Bparameters
StepFun
Step-3.5-Flash
196.0Bparameters
560.0B
Ling 3.1 Flash
196.0B
Step-3.5-Flash

Context Window

Maximum input and output token capacity

Only Step-3.5-Flash specifies input context (65,536 tokens). Only Step-3.5-Flash specifies output context (8,192 tokens).

InclusionAI
Ling 3.1 Flash
Input- tokens
Output- tokens
StepFun
Step-3.5-Flash
Input65,536 tokens
Output8,192 tokens
Fri Oct 09 2026 • llm-stats.com

Release Timeline

When each model was launched

Ling 3.1 Flash was released on 2026-09-30, while Step-3.5-Flash was released on 2026-02-02.

Ling 3.1 Flash is 8 months newer than Step-3.5-Flash.

Ling 3.1 Flash

Sep 30, 2026

1 weeks ago

8mo newer
Step-3.5-Flash

Feb 2, 2026

8 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

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Ling 3.1 Flash and Step-3.5-Flash side-by-side, then vote on the output you prefer.

Ling 3.1 Flash
✓ Preferred
Step-3.5-Flash
Open in Playground

FAQ

Common questions about Ling 3.1 Flash vs Step-3.5-Flash.

Which is better, Ling 3.1 Flash or Step-3.5-Flash?

Ling 3.1 Flash leads the LLM Stats Score 51.0 to 37.1. Ling 3.1 Flash is made by InclusionAI 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 Ling 3.1 Flash compare to Step-3.5-Flash in benchmarks?

Ling 3.1 Flash scores CyberGym: 87.9%, DRACO: 85.5%, FrontierSWE: 75.2%, Multi-Challenge: 69.8%, SkillsBench: 68.7%. 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%.

What are the context window sizes for Ling 3.1 Flash and Step-3.5-Flash?

Ling 3.1 Flash supports an unknown number of 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 Ling 3.1 Flash and Step-3.5-Flash?

Key differences include LLM Stats Score (51.0 vs 37.1), licensing (Unknown vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Ling 3.1 Flash and Step-3.5-Flash?

Ling 3.1 Flash is developed by InclusionAI and Step-3.5-Flash is developed by StepFun.

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