Model Comparison

LongCat-Flash-Chat vs o1-previewWhich is better in 2026?

o1-preview shows notably better performance in the majority of benchmarks. LongCat-Flash-Chat is 50.0x cheaper per token.

Verdict: LongCat-Flash-Chat vs o1-preview — which is better?

LongCat-Flash-Chat (by Meituan) and o1-preview (by OpenAI) 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.

LongCat-Flash-Chat outperforms in 1 benchmarks (SWE-Bench Verified), while o1-preview is better at 2 benchmarks (GPQA, MMLU). o1-preview shows notably better performance in the majority of benchmarks.

On price, LongCat-Flash-Chat is roughly 50.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Choose LongCat-Flash-Chat if…

  • cost matters — it's about 50.0x cheaper per token
  • you want the most recent training data — it shipped Aug 2025
  • you need open weights you can self-host or fine-tune

Choose o1-preview if…

  • you want the strongest raw capability — it leads on 2 of 3 shared benchmarks

Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

LongCat-Flash-Chat outperforms in 1 benchmarks (SWE-Bench Verified), while o1-preview is better at 2 benchmarks (GPQA, MMLU).

o1-preview shows notably better performance in the majority of benchmarks.

Fri Jul 31 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

LongCat-Flash-Chat costs less

For input processing, LongCat-Flash-Chat ($0.30/1M tokens) is 50.0x cheaper than o1-preview ($15.00/1M tokens).

For output processing, LongCat-Flash-Chat ($1.20/1M tokens) is 50.0x cheaper than o1-preview ($60.00/1M tokens).

In conclusion, o1-preview is more expensive than LongCat-Flash-Chat.*

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

Lowest available price from all providers
Fri Jul 31 2026 • llm-stats.com
Meituan
LongCat-Flash-Chat
Input tokens$0.30
Output tokens$1.20
Best providerMeituan
OpenAI
o1-preview
Input tokens$15.00
Output tokens$60.00
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Both models have the same input context window of 128,000 tokens. LongCat-Flash-Chat can generate longer responses up to 128,000 tokens, while o1-preview is limited to 32,768 tokens.

Meituan
LongCat-Flash-Chat
Input128,000 tokens
Output128,000 tokens
OpenAI
o1-preview
Input128,000 tokens
Output32,768 tokens
Fri Jul 31 2026 • llm-stats.com

License

Usage and distribution terms

LongCat-Flash-Chat is licensed under MIT, while o1-preview uses a proprietary license.

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

LongCat-Flash-Chat

MIT

Open weights

o1-preview

Proprietary

Closed source

Release Timeline

When each model was launched

LongCat-Flash-Chat was released on 2025-08-29, while o1-preview was released on 2024-09-12.

LongCat-Flash-Chat is 12 months newer than o1-preview.

LongCat-Flash-Chat

Aug 29, 2025

11 months ago

11mo newer
o1-preview

Sep 12, 2024

1.9 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

LongCat-Flash-Chat is available from Meituan. o1-preview is available from OpenAI, Azure.

LongCat-Flash-Chat

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

o1-preview

openai logo
OpenAI
Input Price:Input: $15.00/1MOutput Price:Output: $60.00/1M
azure logo
Azure
Input Price:Input: $16.50/1MOutput Price:Output: $66.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Meituan
Less expensive input tokens
Less expensive output tokens
Has open weights
Higher SWE-Bench Verified score (60.4% vs 41.3%)
OpenAI
Higher GPQA score (73.3% vs 73.2%)
Higher MMLU score (90.8% vs 89.7%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against LongCat-Flash-Chat and o1-preview side-by-side, then vote on the output you prefer.

LongCat-Flash-Chat
✓ Preferred
o1-preview
Open in Playground
AI Model Comparison Table
Feature
Meituan
LongCat-Flash-Chat
OpenAI
o1-preview

FAQ

Common questions about LongCat-Flash-Chat vs o1-preview.

Which is better, LongCat-Flash-Chat or o1-preview?

o1-preview shows notably better performance in the majority of benchmarks. LongCat-Flash-Chat is made by Meituan and o1-preview is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does LongCat-Flash-Chat compare to o1-preview in benchmarks?

LongCat-Flash-Chat scores MATH-500: 96.4%, MMLU: 89.7%, IFEval: 89.6%, ZebraLogic: 89.3%, HumanEval: 88.4%. o1-preview scores MGSM: 90.8%, MMLU: 90.8%, MATH: 85.5%, GPQA: 73.3%, LiveBench: 52.3%.

Is LongCat-Flash-Chat cheaper than o1-preview?

LongCat-Flash-Chat is 50.0x cheaper for input tokens. LongCat-Flash-Chat costs $0.30/M input and $1.20/M output via meituan. o1-preview costs $15.00/M input and $60.00/M output via openai.

What are the context window sizes for LongCat-Flash-Chat and o1-preview?

LongCat-Flash-Chat supports 128K tokens and o1-preview 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 LongCat-Flash-Chat and o1-preview?

Key differences include input pricing ($0.30 vs $15.00/M), licensing (MIT vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes LongCat-Flash-Chat and o1-preview?

LongCat-Flash-Chat is developed by Meituan and o1-preview is developed by OpenAI.

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