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DeepSeek-V4.1-Flash vs LongCat-Flash-Chat

DeepSeek-V4.1-Flash leads the LLM Stats Score 51.8 to 19.8. DeepSeek-V4.1-Flash is 1.6x cheaper per token.

DeepSeek · Meituan · Updated for 2026

Which is better?

DeepSeek-V4.1-Flash leads the overall LLM Stats Score 51.8 to 19.8, ranking #12 overall.

In the 1 individual benchmarks reported for both models, DeepSeek-V4.1-Flash wins 1; this is a narrower head-to-head signal than the composite indexes.

On price, DeepSeek-V4.1-Flash is roughly 1.6x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

DeepSeek-V4.1-Flash also accepts a larger context window (1,040,000 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 DeepSeek-V4.1-Flash

  • overall performance matters — it scores 51.8 and ranks #12 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 1 of 1 exact shared results
  • cost matters — it's about 1.6x cheaper per token
  • you process long inputs — it offers a 1,040,000 token context window
  • you want the most recent training data — it shipped Sep 2026

Choose LongCat-Flash-Chat

  • you want predictable pricing at $0.30/M input and $1.20/M output

At a glance

The differences that matter most.

DeepSeek-V4.1-Flash
DeepSeek
LongCat-Flash-Chat
Meituan
Core performance indexes
LLM Stats Score
51.8
#12
19.8
#197
Reasoning
48.9
#17
19.8
#193
Coding
44.4
#5
12.4
#145
Agents
41.3
#4
9.2
#127
Cost, coverage & limits
Benchmark wins
1 of 1
0 of 1
Input price
$0.22 / M
$0.30 / M
Output price
$0.66 / M
$1.20 / M
Context window
1,040,000
128,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

2 shared
Index
DeepSeek-V4.1-Flash
LongCat-Flash-Chat
Math
35.2#43
18.9#174
Tool use
35.1#2
8.7#135
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

20 reported for DeepSeek-V4.1-Flash · 16 for LongCat-Flash-Chat

1 shared

DeepSeek-V4.1-Flash outperforms in 1 benchmarks (GPQA), while LongCat-Flash-Chat is better at 0 benchmarks.

DeepSeek-V4.1-Flash significantly outperforms across most benchmarks.

Fri Sep 11 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

DeepSeek-V4.1-Flash costs less

For input processing, DeepSeek-V4.1-Flash ($0.22/1M tokens) is 1.4x cheaper than LongCat-Flash-Chat ($0.30/1M tokens).

For output processing, DeepSeek-V4.1-Flash ($0.66/1M tokens) is 1.8x cheaper than LongCat-Flash-Chat ($1.20/1M tokens).

In conclusion, LongCat-Flash-Chat is more expensive than DeepSeek-V4.1-Flash.*

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

Lowest available price from all providers
Fri Sep 11 2026 • llm-stats.com
DeepSeek
DeepSeek-V4.1-Flash
Input tokens$0.22
Output tokens$0.66
Best providerFireworks
Meituan
LongCat-Flash-Chat
Input tokens$0.30
Output tokens$1.20
Best providerMeituan
Notice missing or incorrect data?Start an Issue→

Model Size

Parameter count comparison

203.2B diff

DeepSeek-V4.1-Flash has 203.2B more parameters than LongCat-Flash-Chat, making it 36.3% larger.

DeepSeek
DeepSeek-V4.1-Flash
763.2Bparameters
Meituan
LongCat-Flash-Chat
560.0Bparameters
763.2B
DeepSeek-V4.1-Flash
560.0B
LongCat-Flash-Chat

Context Window

Maximum input and output token capacity

DeepSeek-V4.1-Flash accepts 1,040,000 input tokens compared to LongCat-Flash-Chat's 128,000 tokens. DeepSeek-V4.1-Flash can generate longer responses up to 393,216 tokens, while LongCat-Flash-Chat is limited to 128,000 tokens.

DeepSeek
DeepSeek-V4.1-Flash
Input1,040,000 tokens
Output393,216 tokens
Meituan
LongCat-Flash-Chat
Input128,000 tokens
Output128,000 tokens
Fri Sep 11 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

DeepSeek-V4.1-Flash supports multimodal inputs, whereas LongCat-Flash-Chat does not.

DeepSeek-V4.1-Flash can handle both text and other forms of data like images, making it suitable for multimodal applications.

DeepSeek-V4.1-Flash

Text
Images
Audio
Video

LongCat-Flash-Chat

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under MIT.

Both models share the same licensing terms, providing consistent usage rights.

DeepSeek-V4.1-Flash

MIT

Open weights

LongCat-Flash-Chat

MIT

Open weights

Release Timeline

When each model was launched

DeepSeek-V4.1-Flash was released on 2026-09-10, while LongCat-Flash-Chat was released on 2025-08-29.

DeepSeek-V4.1-Flash is 13 months newer than LongCat-Flash-Chat.

DeepSeek-V4.1-Flash

Sep 10, 2026

0 days ago

1.0yr newer
LongCat-Flash-Chat

Aug 29, 2025

1.0 years 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

DeepSeek-V4.1-Flash is available from Fireworks, DeepInfra, DeepSeek, Novita. LongCat-Flash-Chat is available from Meituan.

DeepSeek-V4.1-Flash

fireworks logo
Fireworks
Input Price:Input: $0.22/1MOutput Price:Output: $0.66/1M
deepinfra logo
Deepinfra
Input Price:Input: $0.30/1MOutput Price:Output: $1.20/1M
deepseek logo
DeepSeek
Input Price:Input: $0.30/1MOutput Price:Output: $1.20/1M
novita logo
Novita
Input Price:Input: $0.30/1MOutput Price:Output: $1.20/1M

LongCat-Flash-Chat

meituan logo
Meituan
Input Price:Input: $0.30/1MOutput Price:Output: $1.20/1M
* 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 DeepSeek-V4.1-Flash and LongCat-Flash-Chat side-by-side, then vote on the output you prefer.

DeepSeek-V4.1-Flash
✓ Preferred
LongCat-Flash-Chat
Open in Playground

FAQ

Common questions about DeepSeek-V4.1-Flash vs LongCat-Flash-Chat.

Which is better, DeepSeek-V4.1-Flash or LongCat-Flash-Chat?

DeepSeek-V4.1-Flash leads the LLM Stats Score 51.8 to 19.8. DeepSeek-V4.1-Flash is made by DeepSeek and LongCat-Flash-Chat is made by Meituan. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does DeepSeek-V4.1-Flash compare to LongCat-Flash-Chat in benchmarks?

DeepSeek-V4.1-Flash scores CodeForces: 100.0%, GPQA: 90.9%, Terminal-Bench 2.1: 90.6%, BabyVision: 89.6%, CyberGym: 88.1%. LongCat-Flash-Chat scores MATH-500: 96.4%, MMLU: 89.7%, IFEval: 89.6%, ZebraLogic: 89.3%, HumanEval: 88.4%.

Is DeepSeek-V4.1-Flash cheaper than LongCat-Flash-Chat?

DeepSeek-V4.1-Flash is 1.4x cheaper for input tokens. DeepSeek-V4.1-Flash costs $0.22/M input and $0.66/M output via fireworks. LongCat-Flash-Chat costs $0.30/M input and $1.20/M output via meituan.

What are the context window sizes for DeepSeek-V4.1-Flash and LongCat-Flash-Chat?

DeepSeek-V4.1-Flash supports 1.0M tokens and LongCat-Flash-Chat supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between DeepSeek-V4.1-Flash and LongCat-Flash-Chat?

Key differences include LLM Stats Score (51.8 vs 19.8), context window (1.0M vs 128K), input pricing ($0.22 vs $0.30/M), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

Who makes DeepSeek-V4.1-Flash and LongCat-Flash-Chat?

DeepSeek-V4.1-Flash is developed by DeepSeek and LongCat-Flash-Chat is developed by Meituan.

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