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GPT-6 Rosalind vs LongCat-Flash-Chat

Comparing GPT-6 Rosalind and LongCat-Flash-Chat across benchmarks, pricing, and capabilities.

OpenAI · Meituan · Updated for 2026

Which is better?

GPT-6 Rosalind and LongCat-Flash-Chat trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.

On price, LongCat-Flash-Chat is roughly 57.1x 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 GPT-6 Rosalind

  • you want the most recent training data — it shipped Oct 2026

Choose LongCat-Flash-Chat

  • cost matters — it's about 57.1x cheaper per token
  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

GPT-6 Rosalind
OpenAI
LongCat-Flash-Chat
Meituan
Benchmark wins
—
—
Input price
$15.00 / M
$0.30 / M
Output price
$75.00 / M
$1.20 / M
Context window
—
128,000

Individual benchmarks

0 reported for GPT-6 Rosalind · 16 for LongCat-Flash-Chat

No common benchmarks found

GPT-6 Rosalind and LongCat-Flash-Chatdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

LongCat-Flash-Chat costs less

For input processing, GPT-6 Rosalind ($15.00/1M tokens) is 50.0x more expensive than LongCat-Flash-Chat ($0.30/1M tokens).

For output processing, GPT-6 Rosalind ($75.00/1M tokens) is 62.5x more expensive than LongCat-Flash-Chat ($1.20/1M tokens).

In conclusion, GPT-6 Rosalind is more expensive than LongCat-Flash-Chat.*

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

Lowest available price from all providers
Fri Nov 06 2026 • llm-stats.com
OpenAI
GPT-6 Rosalind
Input tokens$15.00
Output tokens$75.00
Best providerOpenAI
Meituan
LongCat-Flash-Chat
Input tokens$0.30
Output tokens$1.20
Best providerMeituan
Notice missing or incorrect data?

Context Window

Maximum input and output token capacity

Only LongCat-Flash-Chat specifies input context (128,000 tokens). Only LongCat-Flash-Chat specifies output context (128,000 tokens).

OpenAI
GPT-6 Rosalind
Input- tokens
Output- tokens
Meituan
LongCat-Flash-Chat
Input128,000 tokens
Output128,000 tokens
Fri Nov 06 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

GPT-6 Rosalind supports multimodal inputs, whereas LongCat-Flash-Chat does not.

GPT-6 Rosalind can handle both text and other forms of data like images, making it suitable for multimodal applications.

GPT-6 Rosalind

Text
Images
Audio
Video

LongCat-Flash-Chat

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-6 Rosalind 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-6 Rosalind

Proprietary

Closed source

LongCat-Flash-Chat

MIT

Open weights

Release Timeline

When each model was launched

GPT-6 Rosalind was released on 2026-10-30, while LongCat-Flash-Chat was released on 2025-08-29.

GPT-6 Rosalind is 14 months newer than LongCat-Flash-Chat.

GPT-6 Rosalind

Oct 30, 2026

1 weeks ago

1.2yr newer
LongCat-Flash-Chat

Aug 29, 2025

1.2 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

GPT-6 Rosalind is available from OpenAI. LongCat-Flash-Chat is available from Meituan.

GPT-6 Rosalind

openai logo
OpenAI
Input Price:Input: $15.00/1MOutput Price:Output: $75.00/1M

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

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against GPT-6 Rosalind and LongCat-Flash-Chat side-by-side, then vote on the output you prefer.

GPT-6 Rosalind
✓ Preferred
LongCat-Flash-Chat
Open in Playground

FAQ

Common questions about GPT-6 Rosalind vs LongCat-Flash-Chat.

Which is better, GPT-6 Rosalind or LongCat-Flash-Chat?

GPT-6 Rosalind (OpenAI) 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 GPT-6 Rosalind compare to LongCat-Flash-Chat in benchmarks?

LongCat-Flash-Chat scores MATH-500: 96.4%, MMLU: 89.7%, IFEval: 89.6%, ZebraLogic: 89.3%, HumanEval: 88.4%.

Is GPT-6 Rosalind cheaper than LongCat-Flash-Chat?

LongCat-Flash-Chat is 50.0x cheaper for input tokens. GPT-6 Rosalind costs $15.00/M input and $75.00/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-6 Rosalind and LongCat-Flash-Chat?

GPT-6 Rosalind supports an unknown number of 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-6 Rosalind and LongCat-Flash-Chat?

Key differences include input pricing ($15.00 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-6 Rosalind and LongCat-Flash-Chat?

GPT-6 Rosalind is developed by OpenAI and LongCat-Flash-Chat is developed by Meituan.

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