GPT-OSS 120B vs o4-mini

Change models
o4-miniOpenAI
IndexAll categories, out of 100.
43.4 ±4.2
44.7 ±3.0 best
GapIndex points below the top.
−1.3 · no clear gap
Top
CoverageIndex weight that has results.
90%
100% best
SpeedOutput tokens per second.
34/s
122/s best
EloLMArena rating and rank.
1365 best
1353
ReleasedMonth of release.
2025-08
2025-04
Input / 1MUS dollars per 1M input tokens.
$0.15 best
$1.10
Output / 1MUS dollars per 1M output tokens.
$0.60 best
$4.40
1K chats2K tokens in, 500 out, each.
$0.60 best
$4.40
1K documents20K tokens in, 1K out, each.
$3.60 best
$26.40
1K agent tasks200K tokens in, 20K out, each.
$42.00 best
$308.00
ContextMaximum tokens in one request.
131K
200K best
AgenticMulti-step tasks with tools.
40.1 best
38.5
CodingCode writing and repair.
42.8
45.2 best
ReasoningLogic problems and puzzles.
40.2
44.9 best
MultimodalTasks with images and text.
—
52.0
KnowledgeFacts and expert knowledge.
42.4 best
40.8
MultilingualTasks in many languages.
51.1 best
35.5
InstructionTasks with strict prompt rules.
53.5 best
53.2
MathMath problems.
51.5 best
50.5

Benchmarks

26 shared
Only GPT-OSS 120B: 22Only o4-mini: 30
GPT-OSS 120B
o4-mini
19.6% best113 / 222
16.5%122 / 222
52.0%152 / 217
61.0% best141 / 217
75.8%103 / 217
79.6% best91 / 217
1.1% best118 / 214
0.6%132 / 214
88.9% best63 / 200
81.7%83 / 200
78.2%105 / 199
78.4% best103 / 199
21.7%122 / 164
24.8% best106 / 164
75.9%113 / 149
79.2% best97 / 149
65.8% best81 / 149
55.6%89 / 149
69.0% best48 / 146
68.7%51 / 146
TaxEval v2Finance
71.6%76 / 143
74.8% best29 / 143
83.2% best49 / 142
82.2%53 / 142
80.1% best66 / 141
77.6%73 / 141
78.5% best72 / 135
74.5%83 / 135
MMLU ProKnowledge
79.2%98 / 135
80.6% best86 / 135
CorpFin v2Finance
58.2%84 / 131
59.0% best79 / 131
AIMEMath
92.6% best18 / 95
83.7%41 / 95
MedQAHealthcare
91.4%38 / 95
96.0% best8 / 95
0.0%80 / 80
5.0% best75 / 80
MGSMMultilingual
92.0%24 / 74
93.4% best9 / 74