Compare/gpt-oss-120B (high) vs Mistral Small 4 (Reasoning)

gpt-oss-120B (high)vsMistral Small 4 (Reasoning)

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

OpenAI

gpt-oss-120B (high)

Input
$0.15/M
Output
$0.6/M
Speed
253 tok/s
TTFT
0.49s
Mistral

Mistral Small 4 (Reasoning)

Input
$0.15/M
Output
$0.6/M
Speed
TTFT

Winner by Category

Cheaper
Tie
Faster (tok/s)
gpt-oss-120B (high)
Lower Latency
Mistral Small 4 (Reasoning)
Benchmarks (11-0)
gpt-oss-120B (high)

Pricing Comparison

Metricgpt-oss-120B (high)Mistral Small 4 (Reasoning)
Input ($/M tokens)$0.15$0.15
Output ($/M tokens)$0.6$0.6
Cost for 1M input + 100K output tokens:
gpt-oss-120B (high)$0.21
Mistral Small 4 (Reasoning)$0.21

Speed Comparison

Output Speed (tokens/s) — higher is better
gpt-oss-120B (high)
253 tok/s
Mistral Small 4 (Reasoning)
Time to First Token (seconds) — lower is better
gpt-oss-120B (high)
0.49s
Mistral Small 4 (Reasoning)

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
33.326.9
Coding Index
28.624.3
Math Index
93.4
GPQA Diamond
78.2%76.9%
MMLU-Pro
80.8%
LiveCodeBench
87.8%
AIME 2025
93.4%
MATH-500
Humanity's Last Exam
18.5%9.5%
SciCode
38.9%38.0%
IFBench
69.0%48.2%
TerminalBench
23.5%17.4%
gpt-oss-120B (high)11 wins
0 winsMistral Small 4 (Reasoning)

Frequently Asked Questions

Which is cheaper, gpt-oss-120B (high) or Mistral Small 4 (Reasoning)?

Both models have similar pricing. Check the detailed breakdown above for input vs output token costs.

Which model performs better on benchmarks?

gpt-oss-120B (high) wins 11 out of 12 benchmarks compared to 0 for Mistral Small 4 (Reasoning). See the detailed benchmark chart above for per-category results.

Which is faster for real-time applications?

gpt-oss-120B (high) generates tokens faster at 253 tok/s vs 0 tok/s. However, Mistral Small 4 (Reasoning) has lower time-to-first-token (0.00s vs 0.49s).

When should I use gpt-oss-120B (high) vs Mistral Small 4 (Reasoning)?

Choose based on your priorities: both are similarly priced, gpt-oss-120B (high) for stronger benchmark performance, and gpt-oss-120B (high) for faster generation. For latency-sensitive apps, check the TTFT comparison above.