Model Comparison

GPT-5.4 vs LongCat-Flash-ChatWhich is better in 2026?

GPT-5.4 significantly outperforms across most benchmarks. LongCat-Flash-Chat is 10.7x cheaper per token.

Verdict: GPT-5.4 vs LongCat-Flash-Chat — which is better?

GPT-5.4 (by OpenAI) and LongCat-Flash-Chat (by Meituan) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

GPT-5.4 outperforms in 2 benchmarks (GPQA, Tau2 Telecom), while LongCat-Flash-Chat is better at 0 benchmarks. GPT-5.4 significantly outperforms across most benchmarks.

On price, LongCat-Flash-Chat is roughly 10.7x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

GPT-5.4 also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose GPT-5.4 if…

  • you want the strongest raw capability — it leads on 2 of 2 shared benchmarks
  • you process long inputs — it offers a 1,000,000 token context window
  • you want the most recent training data — it shipped Mar 2026

Choose LongCat-Flash-Chat if…

  • cost matters — it's about 10.7x cheaper per token
  • you need open weights you can self-host or fine-tune
Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

GPT-5.4 outperforms in 2 benchmarks (GPQA, Tau2 Telecom), while LongCat-Flash-Chat is better at 0 benchmarks.

GPT-5.4 significantly outperforms across most benchmarks.

Thu Jun 11 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

LongCat-Flash-Chat costs less

For input processing, GPT-5.4 ($2.50/1M tokens) is 8.3x more expensive than LongCat-Flash-Chat ($0.30/1M tokens).

For output processing, GPT-5.4 ($15.00/1M tokens) is 12.5x more expensive than LongCat-Flash-Chat ($1.20/1M tokens).

In conclusion, GPT-5.4 is more expensive than LongCat-Flash-Chat.*

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

Lowest available price from all providers
Thu Jun 11 2026 • llm-stats.com
OpenAI
GPT-5.4
Input tokens$2.50
Output tokens$15.00
Best providerOpenAI
Meituan
LongCat-Flash-Chat
Input tokens$0.30
Output tokens$1.20
Best providerMeituan
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-5.4 accepts 1,000,000 input tokens compared to LongCat-Flash-Chat's 128,000 tokens. Both models can generate responses up to 128,000 tokens.

OpenAI
GPT-5.4
Input1,000,000 tokens
Output128,000 tokens
Meituan
LongCat-Flash-Chat
Input128,000 tokens
Output128,000 tokens
Thu Jun 11 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

GPT-5.4 supports multimodal inputs, whereas LongCat-Flash-Chat does not.

GPT-5.4 can handle both text and other forms of data like images, making it suitable for multimodal applications.

GPT-5.4

Text
Images
Audio
Video

LongCat-Flash-Chat

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-5.4 is licensed under a proprietary license, while LongCat-Flash-Chat uses MIT.

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

GPT-5.4

Proprietary

Closed source

LongCat-Flash-Chat

MIT

Open weights

Release Timeline

When each model was launched

GPT-5.4 was released on 2026-03-05, while LongCat-Flash-Chat was released on 2025-08-29.

GPT-5.4 is 6 months newer than LongCat-Flash-Chat.

GPT-5.4

Mar 5, 2026

3 months ago

6mo newer
LongCat-Flash-Chat

Aug 29, 2025

9 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

GPT-5.4 is available from OpenAI. LongCat-Flash-Chat is available from Meituan.

GPT-5.4

openai logo
OpenAI
Input Price:Input: $2.50/1MOutput Price:Output: $15.00/1M

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

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Key Takeaways

OpenAI
Larger context window (1,000,000 tokens)
Supports multimodal inputs
Higher GPQA score (92.8% vs 73.2%)
Higher Tau2 Telecom score (98.9% vs 73.7%)
Meituan
Less expensive input tokens
Less expensive output tokens
Has open weights

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-5.4
Meituan
LongCat-Flash-Chat

FAQ

Common questions about GPT-5.4 vs LongCat-Flash-Chat.

Which is better, GPT-5.4 or LongCat-Flash-Chat?

GPT-5.4 significantly outperforms across most benchmarks. GPT-5.4 is made by OpenAI and LongCat-Flash-Chat is made by Meituan. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GPT-5.4 compare to LongCat-Flash-Chat in benchmarks?

GPT-5.4 scores Tau2 Telecom: 98.9%, ARC-AGI: 93.7%, Graphwalks BFS <128k: 93.0%, GPQA: 92.8%, Graphwalks parents <128k: 89.8%. LongCat-Flash-Chat scores MATH-500: 96.4%, MMLU: 89.7%, IFEval: 89.6%, ZebraLogic: 89.3%, HumanEval: 88.4%.

Is GPT-5.4 cheaper than LongCat-Flash-Chat?

LongCat-Flash-Chat is 8.3x cheaper for input tokens. GPT-5.4 costs $2.50/M input and $15.00/M output via openai. LongCat-Flash-Chat costs $0.30/M input and $1.20/M output via meituan.

What are the context window sizes for GPT-5.4 and LongCat-Flash-Chat?

GPT-5.4 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 GPT-5.4 and LongCat-Flash-Chat?

Key differences include context window (1.0M vs 128K), input pricing ($2.50 vs $0.30/M), multimodal support (yes vs no), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-5.4 and LongCat-Flash-Chat?

GPT-5.4 is developed by OpenAI and LongCat-Flash-Chat is developed by Meituan.

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