Compare/Grok 4.1 Fast (Reasoning) vs Seed-OSS-36B-Instruct

Grok 4.1 Fast (Reasoning)vsSeed-OSS-36B-Instruct

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

xAI

Grok 4.1 Fast (Reasoning)

Input
$0.2/M
Output
$0.5/M
Speed
139 tok/s
TTFT
8.22s
ByteDance Seed

Seed-OSS-36B-Instruct

Input
$0.21/M
Output
$0.57/M
Speed
40 tok/s
TTFT
1.60s

Winner by Category

Cheaper
Grok 4.1 Fast (Reasoning)
Faster (tok/s)
Grok 4.1 Fast (Reasoning)
Lower Latency
Seed-OSS-36B-Instruct
Benchmarks (11-0)
Grok 4.1 Fast (Reasoning)

Pricing Comparison

MetricGrok 4.1 Fast (Reasoning)Seed-OSS-36B-Instruct
Input ($/M tokens)$0.2$0.21
Output ($/M tokens)$0.5$0.57
Cost for 1M input + 100K output tokens:
Grok 4.1 Fast (Reasoning)$0.25
Seed-OSS-36B-Instruct$0.27

Speed Comparison

Output Speed (tokens/s) — higher is better
Grok 4.1 Fast (Reasoning)
139 tok/s
Seed-OSS-36B-Instruct
40 tok/s
Time to First Token (seconds) — lower is better
Grok 4.1 Fast (Reasoning)
8.22s
Seed-OSS-36B-Instruct
1.60s

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
38.625.2
Coding Index
30.916.7
Math Index
89.384.7
GPQA Diamond
85.3%72.6%
MMLU-Pro
85.4%81.5%
LiveCodeBench
82.2%76.5%
AIME 2025
89.3%84.7%
MATH-500
Humanity's Last Exam
17.6%9.1%
SciCode
44.2%36.5%
IFBench
52.7%41.9%
TerminalBench
24.2%6.8%
Grok 4.1 Fast (Reasoning)11 wins
0 winsSeed-OSS-36B-Instruct

Frequently Asked Questions

Which is cheaper, Grok 4.1 Fast (Reasoning) or Seed-OSS-36B-Instruct?

Grok 4.1 Fast (Reasoning) is cheaper overall. Its blended price (3:1 input/output ratio) is $0.28/M tokens vs $0.30/M for Seed-OSS-36B-Instruct.

Which model performs better on benchmarks?

Grok 4.1 Fast (Reasoning) wins 11 out of 12 benchmarks compared to 0 for Seed-OSS-36B-Instruct. See the detailed benchmark chart above for per-category results.

Which is faster for real-time applications?

Grok 4.1 Fast (Reasoning) generates tokens faster at 139 tok/s vs 40 tok/s. However, Seed-OSS-36B-Instruct has lower time-to-first-token (1.60s vs 8.22s).

When should I use Grok 4.1 Fast (Reasoning) vs Seed-OSS-36B-Instruct?

Choose based on your priorities: Grok 4.1 Fast (Reasoning) for lower cost, Grok 4.1 Fast (Reasoning) for stronger benchmark performance, and Grok 4.1 Fast (Reasoning) for faster generation. For latency-sensitive apps, check the TTFT comparison above.