LongCat-Flash-Chat vs o1-preview
LongCat-Flash-Chat and o1-preview are closely matched at 19.8 and 16.6 on the LLM Stats Score. LongCat-Flash-Chat is 50.0x cheaper per token.
Meituan · OpenAI · Updated for 2026
Which is better?
LongCat-Flash-Chat and o1-preview are closely matched on the overall LLM Stats Score at 19.8 and 16.6.
In the 3 individual benchmarks reported for both models, o1-preview wins 2; this is a narrower head-to-head signal than the composite indexes.
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.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose LongCat-Flash-Chat
- 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
- you value its reported benchmark strengths — it wins 2 of 3 exact shared results
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
16 reported for LongCat-Flash-Chat · 8 for o1-preview
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.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
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
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.
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.
MIT
Open weights
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.
Aug 29, 2025
1.0 years ago
11mo newerSep 12, 2024
2.0 years ago
Knowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
LongCat-Flash-Chat is available from Meituan. o1-preview is available from OpenAI, Azure.
LongCat-Flash-Chat
o1-preview
Outputs Comparison
Judge for yourself.
Run your own prompts against LongCat-Flash-Chat and o1-preview side-by-side, then vote on the output you prefer.
FAQ
Common questions about LongCat-Flash-Chat vs o1-preview.