Compare/Grok Code Fast 1 vs gpt-oss-20B (low)

Grok Code Fast 1vsgpt-oss-20B (low)

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

xAI

Grok Code Fast 1

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

gpt-oss-20B (low)

Input
$0.06/M
Output
$0.2/M
Speed
262 tok/s
TTFT
0.46s

Winner by Category

Cheaper
Grok Code Fast 1
Faster (tok/s)
gpt-oss-20B (low)
Lower Latency
Grok Code Fast 1
Benchmarks (8-3)
Grok Code Fast 1

Pricing Comparison

MetricGrok Code Fast 1gpt-oss-20B (low)
Input ($/M tokens)$0$0.06
Output ($/M tokens)$0$0.2
Cost for 1M input + 100K output tokens:
Grok Code Fast 1$0.00
gpt-oss-20B (low)$0.08

Speed Comparison

Output Speed (tokens/s) — higher is better
Grok Code Fast 1
gpt-oss-20B (low)
262 tok/s
Time to First Token (seconds) — lower is better
Grok Code Fast 1
gpt-oss-20B (low)
0.46s

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
28.720.8
Coding Index
23.714.4
Math Index
43.362.3
GPQA Diamond
72.7%61.1%
MMLU-Pro
79.3%71.8%
LiveCodeBench
65.7%65.2%
AIME 2025
43.3%62.3%
MATH-500
Humanity's Last Exam
7.5%5.1%
SciCode
36.2%34.0%
IFBench
41.4%57.8%
TerminalBench
17.4%4.5%
Grok Code Fast 18 wins
3 winsgpt-oss-20B (low)

Frequently Asked Questions

Which is cheaper, Grok Code Fast 1 or gpt-oss-20B (low)?

Grok Code Fast 1 is cheaper overall. Its blended price (3:1 input/output ratio) is $0.00/M tokens vs $0.10/M for gpt-oss-20B (low).

Which model performs better on benchmarks?

Grok Code Fast 1 wins 8 out of 12 benchmarks compared to 3 for gpt-oss-20B (low). See the detailed benchmark chart above for per-category results.

Which is faster for real-time applications?

gpt-oss-20B (low) generates tokens faster at 262 tok/s vs 0 tok/s. Grok Code Fast 1 also has lower time-to-first-token (0.00s vs 0.46s).

When should I use Grok Code Fast 1 vs gpt-oss-20B (low)?

Choose based on your priorities: Grok Code Fast 1 for lower cost, Grok Code Fast 1 for stronger benchmark performance, and gpt-oss-20B (low) for faster generation. For latency-sensitive apps, check the TTFT comparison above.