Compare/LongCat 2.0 vs GPT-5.6 Terra (high)

LongCat 2.0vsGPT-5.6 Terra (high)

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

LongCat

LongCat 2.0

Input
$0/M
Output
$0/M
Speed
TTFT
OpenAI

GPT-5.6 Terra (high)

Input
$2.5/M
Output
$15/M
Speed
128 tok/s
TTFT
1.92s

Winner by Category

Cheaper
LongCat 2.0
Faster (tok/s)
GPT-5.6 Terra (high)
Lower Latency
LongCat 2.0
Benchmarks (0-7)
GPT-5.6 Terra (high)

Pricing Comparison

MetricLongCat 2.0GPT-5.6 Terra (high)
Input ($/M tokens)$0$2.5
Output ($/M tokens)$0$15
Cost for 1M input + 100K output tokens:
LongCat 2.0$0.00
GPT-5.6 Terra (high)$4.00

Speed Comparison

Output Speed (tokens/s) — higher is better
LongCat 2.0
GPT-5.6 Terra (high)
128 tok/s
Time to First Token (seconds) — lower is better
LongCat 2.0
GPT-5.6 Terra (high)
1.92s

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
33.549.0
Coding Index
45.367.1
Math Index
GPQA Diamond
78.0%89.6%
MMLU-Pro
LiveCodeBench
AIME 2025
MATH-500
Humanity's Last Exam
32.1%36.7%
SciCode
35.4%50.1%
IFBench
64.4%
TerminalBench
57.6%
LongCat 2.00 wins
7 winsGPT-5.6 Terra (high)

Frequently Asked Questions

Which is cheaper, LongCat 2.0 or GPT-5.6 Terra (high)?

LongCat 2.0 is cheaper overall. Its blended price (3:1 input/output ratio) is $0.00/M tokens vs $5.63/M for GPT-5.6 Terra (high).

Which model performs better on benchmarks?

GPT-5.6 Terra (high) wins 7 out of 12 benchmarks compared to 0 for LongCat 2.0. See the detailed benchmark chart above for per-category results.

Which is faster for real-time applications?

GPT-5.6 Terra (high) generates tokens faster at 128 tok/s vs 0 tok/s. LongCat 2.0 also has lower time-to-first-token (0.00s vs 1.92s).

When should I use LongCat 2.0 vs GPT-5.6 Terra (high)?

Choose based on your priorities: LongCat 2.0 for lower cost, GPT-5.6 Terra (high) for stronger benchmark performance, and GPT-5.6 Terra (high) for faster generation. For latency-sensitive apps, check the TTFT comparison above.