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LongCat-2.5 vs Step 3.7 Flash

LongCat-2.5 leads the LLM Stats Score 50.0 to 29.6. Step 3.7 Flash is 1.2x cheaper per token.

Meituan · StepFun · Updated for 2026

Which is better?

LongCat-2.5 leads the overall LLM Stats Score 50.0 to 29.6, ranking #20 overall.

In the 2 individual benchmarks reported for both models, LongCat-2.5 wins 2; this is a narrower head-to-head signal than the composite indexes.

On price, Step 3.7 Flash is roughly 1.2x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

LongCat-2.5 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 LongCat-2.5

  • overall performance matters — it scores 50.0 and ranks #20 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 2 of 2 exact shared results
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Nov 2026

Choose Step 3.7 Flash

  • cost matters — it's about 1.2x cheaper per token
  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

LongCat-2.5
Meituan
Step 3.7 Flash
StepFun
Core performance indexes
LLM Stats Score
50.0
#20
29.6
#153
Reasoning
48.3
#21
29.6
#151
Coding
38.6
#27
19.2
#133
Agents
36.3
#23
13.4
#124
Cost, coverage & limits
Benchmark wins
2 of 2
0 of 2
Input price
$0.30 / M
$0.20 / M
Output price
$1.20 / M
$1.15 / M
Context window
1,048,576
262,144

Individual benchmarks

23 reported for LongCat-2.5 · 4 for Step 3.7 Flash

2 shared

LongCat-2.5 outperforms in 2 benchmarks (Humanity's Last Exam (with tools, text-only), Terminal-Bench 2.1), while Step 3.7 Flash is better at 0 benchmarks.

LongCat-2.5 significantly outperforms across most benchmarks.

Fri Nov 06 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Step 3.7 Flash costs less

For input processing, LongCat-2.5 ($0.30/1M tokens) is 1.5x more expensive than Step 3.7 Flash ($0.20/1M tokens).

For output processing, LongCat-2.5 ($1.20/1M tokens) is 1.0x more expensive than Step 3.7 Flash ($1.15/1M tokens).

In conclusion, LongCat-2.5 is more expensive than Step 3.7 Flash.*

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

Lowest available price from all providers
Fri Nov 06 2026 • llm-stats.com
Meituan
LongCat-2.5
Input tokens$0.30
Output tokens$1.20
Best providerMeituan
StepFun
Step 3.7 Flash
Input tokens$0.20
Output tokens$1.15
Best providerDeepinfra
Notice missing or incorrect data?

Model Size

Parameter count comparison

1402.0B diff

LongCat-2.5 has 1402.0B more parameters than Step 3.7 Flash, making it 708.1% larger.

Meituan
LongCat-2.5
1.6Tparameters
StepFun
Step 3.7 Flash
198.0Bparameters
1600.0B
LongCat-2.5
198.0B
Step 3.7 Flash

Context Window

Maximum input and output token capacity

LongCat-2.5 accepts 1,048,576 input tokens compared to Step 3.7 Flash's 262,144 tokens. Step 3.7 Flash can generate longer responses up to 262,144 tokens, while LongCat-2.5 is limited to 131,072 tokens.

Meituan
LongCat-2.5
Input1,048,576 tokens
Output131,072 tokens
StepFun
Step 3.7 Flash
Input262,144 tokens
Output262,144 tokens
Fri Nov 06 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both LongCat-2.5 and Step 3.7 Flash support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

LongCat-2.5

Text
Images
Audio
Video

Step 3.7 Flash

Text
Images
Audio
Video

Release Timeline

When each model was launched

LongCat-2.5 was released on 2026-11-01, while Step 3.7 Flash was released on 2026-06-10.

LongCat-2.5 is 5 months newer than Step 3.7 Flash.

LongCat-2.5

Nov 1, 2026

4 days ago

4mo newer
Step 3.7 Flash

Jun 10, 2026

4 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

LongCat-2.5 is available from Meituan. Step 3.7 Flash is available from DeepInfra.

LongCat-2.5

meituan logo
Meituan
Input Price:Input: $0.30/1MOutput Price:Output: $1.20/1M

Step 3.7 Flash

deepinfra logo
Deepinfra
Input Price:Input: $0.20/1MOutput Price:Output: $1.15/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against LongCat-2.5 and Step 3.7 Flash side-by-side, then vote on the output you prefer.

LongCat-2.5
✓ Preferred
Step 3.7 Flash
Open in Playground

FAQ

Common questions about LongCat-2.5 vs Step 3.7 Flash.

Which is better, LongCat-2.5 or Step 3.7 Flash?

LongCat-2.5 leads the LLM Stats Score 50.0 to 29.6. LongCat-2.5 is made by Meituan and Step 3.7 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 LongCat-2.5 compare to Step 3.7 Flash in benchmarks?

LongCat-2.5 scores MathVision: 96.5%, BrowseComp: 91.9%, CharXiv-R: 90.2%, Terminal-Bench 2.1: 88.4%, Video-MME: 85.2%. Step 3.7 Flash scores Terminal-Bench 2.1: 59.5%, SWE-Bench Pro: 56.3%, Humanity's Last Exam (with tools, text-only): 47.2%, GDPval: 45.8%.

Is LongCat-2.5 cheaper than Step 3.7 Flash?

Step 3.7 Flash is 1.5x cheaper for input tokens. LongCat-2.5 costs $0.30/M input and $1.20/M output via meituan. Step 3.7 Flash costs $0.20/M input and $1.15/M output via deepinfra.

What are the context window sizes for LongCat-2.5 and Step 3.7 Flash?

LongCat-2.5 supports 1.0M tokens and Step 3.7 Flash supports 262K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between LongCat-2.5 and Step 3.7 Flash?

Key differences include LLM Stats Score (50.0 vs 29.6), context window (1.0M vs 262K), input pricing ($0.30 vs $0.20/M), licensing (Unknown vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes LongCat-2.5 and Step 3.7 Flash?

LongCat-2.5 is developed by Meituan and Step 3.7 Flash is developed by StepFun.

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