Model Comparison

GPT OSS 120B vs LongCat-Flash-Thinking-2601

LongCat-Flash-Thinking-2601 significantly outperforms across most benchmarks. GPT OSS 120B is 2.9x cheaper per token.

Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

GPT OSS 120B outperforms in 0 benchmarks, while LongCat-Flash-Thinking-2601 is better at 2 benchmarks (GPQA, Humanity's Last Exam).

LongCat-Flash-Thinking-2601 significantly outperforms across most benchmarks.

Mon Apr 20 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT OSS 120B costs less

For input processing, GPT OSS 120B ($0.09/1M tokens) is 3.3x cheaper than LongCat-Flash-Thinking-2601 ($0.30/1M tokens).

For output processing, GPT OSS 120B ($0.45/1M tokens) is 2.7x cheaper than LongCat-Flash-Thinking-2601 ($1.20/1M tokens).

In conclusion, LongCat-Flash-Thinking-2601 is more expensive than GPT OSS 120B.*

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

Lowest available price from all providers
Mon Apr 20 2026 • llm-stats.com
OpenAI
GPT OSS 120B
Input tokens$0.09
Output tokens$0.45
Best providerDeepinfra
Meituan
LongCat-Flash-Thinking-2601
Input tokens$0.30
Output tokens$1.20
Best providerMeituan
Notice missing or incorrect data?Start an Issue→

Model Size

Parameter count comparison

443.2B diff

LongCat-Flash-Thinking-2601 has 443.2B more parameters than GPT OSS 120B, making it 379.5% larger.

OpenAI
GPT OSS 120B
116.8Bparameters
Meituan
LongCat-Flash-Thinking-2601
560.0Bparameters
116.8B
GPT OSS 120B
560.0B
LongCat-Flash-Thinking-2601

Context Window

Maximum input and output token capacity

GPT OSS 120B accepts 131,072 input tokens compared to LongCat-Flash-Thinking-2601's 128,000 tokens. GPT OSS 120B can generate longer responses up to 131,072 tokens, while LongCat-Flash-Thinking-2601 is limited to 128,000 tokens.

OpenAI
GPT OSS 120B
Input131,072 tokens
Output131,072 tokens
Meituan
LongCat-Flash-Thinking-2601
Input128,000 tokens
Output128,000 tokens
Mon Apr 20 2026 • llm-stats.com

License

Usage and distribution terms

GPT OSS 120B is licensed under Apache 2.0, while LongCat-Flash-Thinking-2601 uses MIT.

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

GPT OSS 120B

Apache 2.0

Open weights

LongCat-Flash-Thinking-2601

MIT

Open weights

Release Timeline

When each model was launched

GPT OSS 120B was released on 2025-08-05, while LongCat-Flash-Thinking-2601 was released on 2026-01-14.

LongCat-Flash-Thinking-2601 is 5 months newer than GPT OSS 120B.

GPT OSS 120B

Aug 5, 2025

8 months ago

LongCat-Flash-Thinking-2601

Jan 14, 2026

3 months ago

5mo newer

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 OSS 120B is available from DeepInfra, Novita, OpenAI, Fireworks, Groq. LongCat-Flash-Thinking-2601 is available from Meituan.

GPT OSS 120B

deepinfra logo
Deepinfra
Input Price:Input: $0.09/1MOutput Price:Output: $0.45/1M
novita logo
Novita
Input Price:Input: $0.10/1MOutput Price:Output: $0.50/1M
openai logo
OpenAI
Input Price:Input: $0.10/1MOutput Price:Output: $0.50/1M
fireworks logo
Fireworks
Input Price:Input: $0.15/1MOutput Price:Output: $0.60/1M
groq logo
Groq
Input Price:Input: $0.15/1MOutput Price:Output: $0.60/1M

LongCat-Flash-Thinking-2601

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→

Key Takeaways

OpenAI
Larger context window (131,072 tokens)
Less expensive input tokens
Less expensive output tokens
Meituan
Higher GPQA score (80.5% vs 80.1%)
Higher Humanity's Last Exam score (25.2% vs 14.9%)

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT OSS 120B
Meituan
LongCat-Flash-Thinking-2601

FAQ

Common questions about GPT OSS 120B vs LongCat-Flash-Thinking-2601

LongCat-Flash-Thinking-2601 significantly outperforms across most benchmarks. GPT OSS 120B is made by OpenAI and LongCat-Flash-Thinking-2601 is made by Meituan. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
GPT OSS 120B scores MMLU: 90.0%, CodeForces: 82.1%, GPQA: 80.1%, TAU-bench Retail: 67.8%, HealthBench: 57.6%. LongCat-Flash-Thinking-2601 scores AIME 2025: 99.6%, Tau2 Telecom: 99.3%, Tau2 Retail: 88.6%, LiveCodeBench: 82.8%, GPQA: 80.5%.
GPT OSS 120B is 3.3x cheaper for input tokens. GPT OSS 120B costs $0.09/M input and $0.45/M output via deepinfra. LongCat-Flash-Thinking-2601 costs $0.30/M input and $1.20/M output via meituan.
GPT OSS 120B supports 131K tokens and LongCat-Flash-Thinking-2601 supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include context window (131K vs 128K), input pricing ($0.09 vs $0.30/M), licensing (Apache 2.0 vs MIT). See the full comparison above for benchmark-by-benchmark results.
GPT OSS 120B is developed by OpenAI and LongCat-Flash-Thinking-2601 is developed by Meituan.