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

LongCat Flash Litevsgpt-oss-120B (high)

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

LongCat

LongCat Flash Lite

Input
$0/M
Output
$0/M
Speed
110 tok/s
TTFT
3.06s
OpenAI

gpt-oss-120B (high)

Input
$0.15/M
Output
$0.6/M
Speed
236 tok/s
TTFT
0.50s

Winner by Category

Cheaper
LongCat Flash Lite
Faster (tok/s)
gpt-oss-120B (high)
Lower Latency
gpt-oss-120B (high)
Benchmarks (0-11)
gpt-oss-120B (high)

Pricing Comparison

MetricLongCat Flash Litegpt-oss-120B (high)
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 (high)$0.21

Speed Comparison

Output Speed (tokens/s) — higher is better
LongCat Flash Lite
110 tok/s
gpt-oss-120B (high)
236 tok/s
Time to First Token (seconds) — lower is better
LongCat Flash Lite
3.06s
gpt-oss-120B (high)
0.50s

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
23.933.3
Coding Index
16.528.6
Math Index
93.4
GPQA Diamond
63.6%78.2%
MMLU-Pro
80.8%
LiveCodeBench
87.8%
AIME 2025
93.4%
MATH-500
Humanity's Last Exam
6.0%18.5%
SciCode
28.4%38.9%
IFBench
43.1%69.0%
TerminalBench
10.6%23.5%
LongCat Flash Lite0 wins
11 winsgpt-oss-120B (high)

Frequently Asked Questions

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

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 (high).

Which model performs better on benchmarks?

gpt-oss-120B (high) wins 11 out of 12 benchmarks compared to 0 for LongCat Flash Lite. See the detailed benchmark chart above for per-category results.

Which is faster for real-time applications?

gpt-oss-120B (high) generates tokens faster at 236 tok/s vs 110 tok/s. However, gpt-oss-120B (high) has lower time-to-first-token (0.50s vs 3.06s).

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

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