Compare/LongCat Flash Lite vs gpt-oss-120B (low)

LongCat Flash Litevsgpt-oss-120B (low)

Side-by-side comparison of pricing, 12 benchmarks, and generation speed.

LongCat

LongCat Flash Lite

Input
$0/M
Output
$0/M
Speed
126 tok/s
TTFT
3.24s
OpenAI

gpt-oss-120B (low)

Input
$0.15/M
Output
$0.6/M
Speed
255 tok/s
TTFT
0.51s

Winner by Category

Cheaper
LongCat Flash Lite
Faster (tok/s)
gpt-oss-120B (low)
Lower Latency
gpt-oss-120B (low)
Benchmarks (3-8)
gpt-oss-120B (low)

Pricing Comparison

MetricLongCat Flash Litegpt-oss-120B (low)
Input ($/M tokens)$0$0.15
Output ($/M tokens)$0$0.6
Cost for 1M input + 100K output tokens:
LongCat Flash Lite$0.00
gpt-oss-120B (low)$0.21

Speed Comparison

Output Speed (tokens/s) — higher is better
LongCat Flash Lite
126 tok/s
gpt-oss-120B (low)
255 tok/s
Time to First Token (seconds) — lower is better
LongCat Flash Lite
3.24s
gpt-oss-120B (low)
0.51s

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
23.924.5
Coding Index
16.515.5
Math Index
66.7
GPQA Diamond
63.6%67.2%
MMLU-Pro
77.5%
LiveCodeBench
70.7%
AIME 2025
66.7%
MATH-500
Humanity's Last Exam
6.0%5.2%
SciCode
28.4%36.0%
IFBench
43.1%58.3%
TerminalBench
10.6%5.3%
LongCat Flash Lite3 wins
8 winsgpt-oss-120B (low)

Frequently Asked Questions

Which is cheaper, LongCat Flash Lite or gpt-oss-120B (low)?

LongCat Flash Lite is cheaper overall. Its blended price (3:1 input/output ratio) is $0.00/M tokens vs $0.26/M for gpt-oss-120B (low).

Which model performs better on benchmarks?

gpt-oss-120B (low) wins 8 out of 12 benchmarks compared to 3 for LongCat Flash Lite. See the detailed benchmark chart above for per-category results.

Which is faster for real-time applications?

gpt-oss-120B (low) generates tokens faster at 255 tok/s vs 126 tok/s. However, gpt-oss-120B (low) has lower time-to-first-token (0.51s vs 3.24s).

When should I use LongCat Flash Lite vs gpt-oss-120B (low)?

Choose based on your priorities: LongCat Flash Lite for lower cost, gpt-oss-120B (low) for stronger benchmark performance, and gpt-oss-120B (low) for faster generation. For latency-sensitive apps, check the TTFT comparison above.