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DeepSeek-V4-Flash-0731 vs LongCat-Flash-Chat

Comparing DeepSeek-V4-Flash-0731 and LongCat-Flash-Chat across benchmarks, pricing, and capabilities.

DeepSeek · Meituan · Updated for 2026

Which is better?

DeepSeek-V4-Flash-0731 and LongCat-Flash-Chat trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.

On price, DeepSeek-V4-Flash-0731 is roughly 4.7x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

DeepSeek-V4-Flash-0731 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 benchmark, pricing, and model metadata for 2026.

Choose DeepSeek-V4-Flash-0731

  • cost matters — it's about 4.7x cheaper per token
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Jul 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-Flash-0731
DeepSeek
LongCat-Flash-Chat
Meituan
Benchmark wins
—
—
Input price
$0.09 / M
$0.30 / M
Output price
$0.18 / M
$1.20 / M
Context window
1,048,576
128,000
Released
Jul 2026
Aug 2025
License
MIT
MIT

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

DeepSeek-V4-Flash-0731 and LongCat-Flash-Chatdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Playground indexes and blind preference scores

Pricing Analysis

Price comparison per million tokens

DeepSeek-V4-Flash-0731 costs less

For input processing, DeepSeek-V4-Flash-0731 ($0.09/1M tokens) is 3.3x cheaper than LongCat-Flash-Chat ($0.30/1M tokens).

For output processing, DeepSeek-V4-Flash-0731 ($0.18/1M tokens) is 6.7x cheaper than LongCat-Flash-Chat ($1.20/1M tokens).

In conclusion, LongCat-Flash-Chat is more expensive than DeepSeek-V4-Flash-0731.*

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

Lowest available price from all providers
Tue Aug 25 2026 • llm-stats.com
DeepSeek
DeepSeek-V4-Flash-0731
Input tokens$0.09
Output tokens$0.18
Best providerDeepinfra
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

256.0B diff

LongCat-Flash-Chat has 256.0B more parameters than DeepSeek-V4-Flash-0731, making it 84.2% larger.

DeepSeek
DeepSeek-V4-Flash-0731
304.0Bparameters
Meituan
LongCat-Flash-Chat
560.0Bparameters
304.0B
DeepSeek-V4-Flash-0731
560.0B
LongCat-Flash-Chat

Context Window

Maximum input and output token capacity

DeepSeek-V4-Flash-0731 accepts 1,048,576 input tokens compared to LongCat-Flash-Chat's 128,000 tokens. LongCat-Flash-Chat can generate longer responses up to 128,000 tokens, while DeepSeek-V4-Flash-0731 is limited to 65,536 tokens.

DeepSeek
DeepSeek-V4-Flash-0731
Input1,048,576 tokens
Output65,536 tokens
Meituan
LongCat-Flash-Chat
Input128,000 tokens
Output128,000 tokens
Tue Aug 25 2026 • llm-stats.com

License

Usage and distribution terms

Both models are licensed under MIT.

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

DeepSeek-V4-Flash-0731

MIT

Open weights

LongCat-Flash-Chat

MIT

Open weights

Release Timeline

When each model was launched

DeepSeek-V4-Flash-0731 was released on 2026-07-31, while LongCat-Flash-Chat was released on 2025-08-29.

DeepSeek-V4-Flash-0731 is 11 months newer than LongCat-Flash-Chat.

DeepSeek-V4-Flash-0731

Jul 31, 2026

3 weeks ago

11mo newer
LongCat-Flash-Chat

Aug 29, 2025

12 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

DeepSeek-V4-Flash-0731 is available from DeepInfra, Novita, Fireworks. LongCat-Flash-Chat is available from Meituan.

DeepSeek-V4-Flash-0731

deepinfra logo
Deepinfra
Input Price:Input: $0.09/1MOutput Price:Output: $0.18/1M
novita logo
Novita
Input Price:Input: $0.14/1MOutput Price:Output: $0.28/1M
fireworks logo
Fireworks
Input Price:Input: $0.44/1MOutput Price:Output: $1.32/1M

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-Flash-0731 and LongCat-Flash-Chat side-by-side, then vote on the output you prefer.

DeepSeek-V4-Flash-0731
✓ Preferred
LongCat-Flash-Chat
Open in Playground

FAQ

Common questions about DeepSeek-V4-Flash-0731 vs LongCat-Flash-Chat.

Which is better, DeepSeek-V4-Flash-0731 or LongCat-Flash-Chat?

DeepSeek-V4-Flash-0731 (DeepSeek) and LongCat-Flash-Chat (Meituan) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does DeepSeek-V4-Flash-0731 compare to LongCat-Flash-Chat in benchmarks?

DeepSeek-V4-Flash-0731 scores Terminal-Bench 2.1: 82.7%, CyberGym: 76.7%, Toolathlon: 70.3%, DSBench-FullStack: 68.7%, DSBench-Hard: 59.6%. LongCat-Flash-Chat scores MATH-500: 96.4%, MMLU: 89.7%, IFEval: 89.6%, ZebraLogic: 89.3%, HumanEval: 88.4%.

Is DeepSeek-V4-Flash-0731 cheaper than LongCat-Flash-Chat?

DeepSeek-V4-Flash-0731 is 3.3x cheaper for input tokens. DeepSeek-V4-Flash-0731 costs $0.09/M input and $0.18/M output via deepinfra. LongCat-Flash-Chat costs $0.30/M input and $1.20/M output via meituan.

What are the context window sizes for DeepSeek-V4-Flash-0731 and LongCat-Flash-Chat?

DeepSeek-V4-Flash-0731 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-Flash-0731 and LongCat-Flash-Chat?

Key differences include context window (1.0M vs 128K), input pricing ($0.09 vs $0.30/M). See the full comparison above for benchmark-by-benchmark results.

Who makes DeepSeek-V4-Flash-0731 and LongCat-Flash-Chat?

DeepSeek-V4-Flash-0731 is developed by DeepSeek and LongCat-Flash-Chat is developed by Meituan.

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