Compare/Kimi K2.5 (Reasoning) vs Apertus 70B Instruct

Kimi K2.5 (Reasoning)vsApertus 70B Instruct

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

Kimi

Kimi K2.5 (Reasoning)

Input
$0.54/M
Output
$2.925/M
Speed
46 tok/s
TTFT
1.29s
Swiss AI Initiative

Apertus 70B Instruct

Input
$0.82/M
Output
$2.92/M
Speed
TTFT

Winner by Category

Cheaper
Kimi K2.5 (Reasoning)
Faster (tok/s)
Kimi K2.5 (Reasoning)
Lower Latency
Apertus 70B Instruct
Benchmarks (7-0)
Kimi K2.5 (Reasoning)

Pricing Comparison

MetricKimi K2.5 (Reasoning)Apertus 70B Instruct
Input ($/M tokens)$0.54$0.82
Output ($/M tokens)$2.925$2.92
Cost for 1M input + 100K output tokens:
Kimi K2.5 (Reasoning)$0.83
Apertus 70B Instruct$1.11

Speed Comparison

Output Speed (tokens/s) — higher is better
Kimi K2.5 (Reasoning)
46 tok/s
Apertus 70B Instruct
Time to First Token (seconds) — lower is better
Kimi K2.5 (Reasoning)
1.29s
Apertus 70B Instruct

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
46.87.7
Coding Index
39.61.9
Math Index
GPQA Diamond
87.9%27.2%
MMLU-Pro
LiveCodeBench
AIME 2025
MATH-500
Humanity's Last Exam
29.4%5.5%
SciCode
49.0%5.7%
IFBench
70.2%25.9%
TerminalBench
34.8%0.0%
Kimi K2.5 (Reasoning)7 wins
0 winsApertus 70B Instruct

Frequently Asked Questions

Which is cheaper, Kimi K2.5 (Reasoning) or Apertus 70B Instruct?

Kimi K2.5 (Reasoning) is cheaper overall. Its blended price (3:1 input/output ratio) is $1.14/M tokens vs $1.34/M for Apertus 70B Instruct.

Which model performs better on benchmarks?

Kimi K2.5 (Reasoning) wins 7 out of 12 benchmarks compared to 0 for Apertus 70B Instruct. See the detailed benchmark chart above for per-category results.

Which is faster for real-time applications?

Kimi K2.5 (Reasoning) generates tokens faster at 46 tok/s vs 0 tok/s. However, Apertus 70B Instruct has lower time-to-first-token (0.00s vs 1.29s).

When should I use Kimi K2.5 (Reasoning) vs Apertus 70B Instruct?

Choose based on your priorities: Kimi K2.5 (Reasoning) for lower cost, Kimi K2.5 (Reasoning) for stronger benchmark performance, and Kimi K2.5 (Reasoning) for faster generation. For latency-sensitive apps, check the TTFT comparison above.