Compare/Cogito v2.1 (Reasoning) vs GPT-5.4 nano (xhigh)

Cogito v2.1 (Reasoning)vsGPT-5.4 nano (xhigh)

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

Deep Cogito

Cogito v2.1 (Reasoning)

Input
$1.25/M
Output
$1.25/M
Speed
92 tok/s
TTFT
0.27s
OpenAI

GPT-5.4 nano (xhigh)

Input
$0.2/M
Output
$1.25/M
Speed
178 tok/s
TTFT
2.70s

Winner by Category

Cheaper
GPT-5.4 nano (xhigh)
Faster (tok/s)
GPT-5.4 nano (xhigh)
Lower Latency
Cogito v2.1 (Reasoning)
Benchmarks (4-7)
GPT-5.4 nano (xhigh)

Pricing Comparison

MetricCogito v2.1 (Reasoning)GPT-5.4 nano (xhigh)
Input ($/M tokens)$1.25$0.2
Output ($/M tokens)$1.25$1.25
Cost for 1M input + 100K output tokens:
Cogito v2.1 (Reasoning)$1.38
GPT-5.4 nano (xhigh)$0.33

Speed Comparison

Output Speed (tokens/s) — higher is better
Cogito v2.1 (Reasoning)
92 tok/s
GPT-5.4 nano (xhigh)
178 tok/s
Time to First Token (seconds) — lower is better
Cogito v2.1 (Reasoning)
0.27s
GPT-5.4 nano (xhigh)
2.70s

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
44.4
Coding Index
24.843.9
Math Index
72.7
GPQA Diamond
76.8%81.7%
MMLU-Pro
84.9%
LiveCodeBench
68.8%
AIME 2025
72.7%
MATH-500
Humanity's Last Exam
11.0%26.5%
SciCode
41.0%46.9%
IFBench
46.3%75.9%
TerminalBench
16.7%42.4%
Cogito v2.1 (Reasoning)4 wins
7 winsGPT-5.4 nano (xhigh)

Frequently Asked Questions

Which is cheaper, Cogito v2.1 (Reasoning) or GPT-5.4 nano (xhigh)?

GPT-5.4 nano (xhigh) is cheaper overall. Its blended price (3:1 input/output ratio) is $0.46/M tokens vs $1.25/M for Cogito v2.1 (Reasoning).

Which model performs better on benchmarks?

GPT-5.4 nano (xhigh) wins 7 out of 12 benchmarks compared to 4 for Cogito v2.1 (Reasoning). See the detailed benchmark chart above for per-category results.

Which is faster for real-time applications?

GPT-5.4 nano (xhigh) generates tokens faster at 178 tok/s vs 92 tok/s. Cogito v2.1 (Reasoning) also has lower time-to-first-token (0.27s vs 2.70s).

When should I use Cogito v2.1 (Reasoning) vs GPT-5.4 nano (xhigh)?

Choose based on your priorities: GPT-5.4 nano (xhigh) for lower cost, GPT-5.4 nano (xhigh) for stronger benchmark performance, and GPT-5.4 nano (xhigh) for faster generation. For latency-sensitive apps, check the TTFT comparison above.