Compare/Devstral Small 2 vs gpt-oss-20B (high)

Devstral Small 2vsgpt-oss-20B (high)

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

Mistral

Devstral Small 2

Input
$0/M
Output
$0/M
Speed
53 tok/s
TTFT
0.50s
OpenAI

gpt-oss-20B (high)

Input
$0.05/M
Output
$0.2/M
Speed
260 tok/s
TTFT
0.40s

Winner by Category

Cheaper
Devstral Small 2
Faster (tok/s)
gpt-oss-20B (high)
Lower Latency
gpt-oss-20B (high)
Benchmarks (2-9)
gpt-oss-20B (high)

Pricing Comparison

MetricDevstral Small 2gpt-oss-20B (high)
Input ($/M tokens)$0$0.05
Output ($/M tokens)$0$0.2
Cost for 1M input + 100K output tokens:
Devstral Small 2$0.00
gpt-oss-20B (high)$0.07

Speed Comparison

Output Speed (tokens/s) — higher is better
Devstral Small 2
53 tok/s
gpt-oss-20B (high)
260 tok/s
Time to First Token (seconds) — lower is better
Devstral Small 2
0.50s
gpt-oss-20B (high)
0.40s

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
19.524.5
Coding Index
20.718.5
Math Index
34.389.3
GPQA Diamond
53.2%68.8%
MMLU-Pro
67.8%74.8%
LiveCodeBench
34.8%77.7%
AIME 2025
34.3%89.3%
MATH-500
Humanity's Last Exam
3.4%9.8%
SciCode
28.8%34.4%
IFBench
31.2%65.1%
TerminalBench
16.7%10.6%
Devstral Small 22 wins
9 winsgpt-oss-20B (high)

Frequently Asked Questions

Which is cheaper, Devstral Small 2 or gpt-oss-20B (high)?

Devstral Small 2 is cheaper overall. Its blended price (3:1 input/output ratio) is $0.00/M tokens vs $0.09/M for gpt-oss-20B (high).

Which model performs better on benchmarks?

gpt-oss-20B (high) 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-20B (high) generates tokens faster at 260 tok/s vs 53 tok/s. However, gpt-oss-20B (high) has lower time-to-first-token (0.40s vs 0.50s).

When should I use Devstral Small 2 vs gpt-oss-20B (high)?

Choose based on your priorities: Devstral Small 2 for lower cost, gpt-oss-20B (high) for stronger benchmark performance, and gpt-oss-20B (high) for faster generation. For latency-sensitive apps, check the TTFT comparison above.