Compare/Devstral Small 2 vs gpt-oss-120B (low)

Devstral Small 2vsgpt-oss-120B (low)

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

Mistral

Devstral Small 2

Input
$0/M
Output
$0/M
Speed
195 tok/s
TTFT
0.34s
OpenAI

gpt-oss-120B (low)

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

Winner by Category

Cheaper
Devstral Small 2
Faster (tok/s)
gpt-oss-120B (low)
Lower Latency
Devstral Small 2
Benchmarks (2-9)
gpt-oss-120B (low)

Pricing Comparison

MetricDevstral Small 2gpt-oss-120B (low)
Input ($/M tokens)$0$0.15
Output ($/M tokens)$0$0.6
Cost for 1M input + 100K output tokens:
Devstral Small 2$0.00
gpt-oss-120B (low)$0.21

Speed Comparison

Output Speed (tokens/s) — higher is better
Devstral Small 2
195 tok/s
gpt-oss-120B (low)
255 tok/s
Time to First Token (seconds) — lower is better
Devstral Small 2
0.34s
gpt-oss-120B (low)
0.51s

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
19.524.5
Coding Index
20.715.5
Math Index
34.366.7
GPQA Diamond
53.2%67.2%
MMLU-Pro
67.8%77.5%
LiveCodeBench
34.8%70.7%
AIME 2025
34.3%66.7%
MATH-500
Humanity's Last Exam
3.4%5.2%
SciCode
28.8%36.0%
IFBench
31.2%58.3%
TerminalBench
16.7%5.3%
Devstral Small 22 wins
9 winsgpt-oss-120B (low)

Frequently Asked Questions

Which is cheaper, Devstral Small 2 or gpt-oss-120B (low)?

Devstral Small 2 is cheaper overall. Its blended price (3:1 input/output ratio) is $0.00/M tokens vs $0.26/M for gpt-oss-120B (low).

Which model performs better on benchmarks?

gpt-oss-120B (low) wins 9 out of 12 benchmarks compared to 2 for Devstral Small 2. 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 195 tok/s. Devstral Small 2 also has lower time-to-first-token (0.34s vs 0.51s).

When should I use Devstral Small 2 vs gpt-oss-120B (low)?

Choose based on your priorities: Devstral Small 2 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.