Compare/Olmo 3.1 32B Instruct vs gpt-oss-120B (low)

Olmo 3.1 32B Instructvsgpt-oss-120B (low)

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

Allen Institute for AI

Olmo 3.1 32B Instruct

Input
$0.2/M
Output
$0.6/M
Speed
55 tok/s
TTFT
0.23s
OpenAI

gpt-oss-120B (low)

Input
$0.15/M
Output
$0.6/M
Speed
255 tok/s
TTFT
0.51s

Winner by Category

Cheaper
gpt-oss-120B (low)
Faster (tok/s)
gpt-oss-120B (low)
Lower Latency
Olmo 3.1 32B Instruct
Benchmarks (0-11)
gpt-oss-120B (low)

Pricing Comparison

MetricOlmo 3.1 32B Instructgpt-oss-120B (low)
Input ($/M tokens)$0.2$0.15
Output ($/M tokens)$0.6$0.6
Cost for 1M input + 100K output tokens:
Olmo 3.1 32B Instruct$0.26
gpt-oss-120B (low)$0.21

Speed Comparison

Output Speed (tokens/s) — higher is better
Olmo 3.1 32B Instruct
55 tok/s
gpt-oss-120B (low)
255 tok/s
Time to First Token (seconds) — lower is better
Olmo 3.1 32B Instruct
0.23s
gpt-oss-120B (low)
0.51s

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
12.224.5
Coding Index
5.615.5
Math Index
66.7
GPQA Diamond
53.9%67.2%
MMLU-Pro
77.5%
LiveCodeBench
70.7%
AIME 2025
66.7%
MATH-500
Humanity's Last Exam
4.9%5.2%
SciCode
16.7%36.0%
IFBench
39.2%58.3%
TerminalBench
0.0%5.3%
Olmo 3.1 32B Instruct0 wins
11 winsgpt-oss-120B (low)

Frequently Asked Questions

Which is cheaper, Olmo 3.1 32B Instruct or gpt-oss-120B (low)?

gpt-oss-120B (low) is cheaper overall. Its blended price (3:1 input/output ratio) is $0.26/M tokens vs $0.30/M for Olmo 3.1 32B Instruct.

Which model performs better on benchmarks?

gpt-oss-120B (low) wins 11 out of 12 benchmarks compared to 0 for Olmo 3.1 32B Instruct. See the detailed benchmark chart above for per-category results.

Which is faster for real-time applications?

gpt-oss-120B (low) generates tokens faster at 255 tok/s vs 55 tok/s. Olmo 3.1 32B Instruct also has lower time-to-first-token (0.23s vs 0.51s).

When should I use Olmo 3.1 32B Instruct vs gpt-oss-120B (low)?

Choose based on your priorities: gpt-oss-120B (low) for lower cost, gpt-oss-120B (low) for stronger benchmark performance, and gpt-oss-120B (low) for faster generation. For latency-sensitive apps, check the TTFT comparison above.