Compare · ModelsLive · 2 picked · head to head
gpt-oss-120b vs o3 Mini
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
gpt-oss-120b wins on 8/13 benchmarks
gpt-oss-120b wins 8 of 13 shared benchmarks. Leads in arena · general · math.
Category leads
coding·o3 Miniarena·gpt-oss-120bknowledge·o3 Minigeneral·gpt-oss-120bmath·gpt-oss-120breasoning·o3 Mini
Hype vs Reality
Attention vs performance
gpt-oss-120b
#134 by perf·no signal
o3 Mini
#248 by perf·no signal
Best value
gpt-oss-120b
40.3x better value than o3 Mini
gpt-oss-120b
475.4 pts/$
$0.10/M
o3 Mini
11.8 pts/$
$2.75/M
Vendor risk
Who is behind the model
OpenAI
$840.0B·Tier 1
OpenAI
$840.0B·Tier 1
Head to head
13 benchmarks · 2 models
gpt-oss-120bo3 Mini
Aider polyglot
o3 Mini leads by +18.6
Aider Polyglot · measures how well AI models can edit code across multiple programming languages using the Aider coding assistant framework.
gpt-oss-120b
41.8
o3 Mini
60.4
Chatbot Arena Elo · Overall
gpt-oss-120b leads by +3.5
gpt-oss-120b
1351.6
o3 Mini
1348.1
Chess Puzzles
gpt-oss-120b leads by +5.3
Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities.
gpt-oss-120b
15.8
o3 Mini
10.6
Dtbench
gpt-oss-120b leads by +12.5
gpt-oss-120b
60.5
o3 Mini
48.0
Fiction.LiveBench
o3 Mini leads by +5.6
Fiction.LiveBench · a continuously updated benchmark using recently published fiction to test reading comprehension and reasoning, preventing data contamination.
gpt-oss-120b
44.4
o3 Mini
50.0
GPQA diamond
o3 Mini leads by +1.7
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
gpt-oss-120b
67.7
o3 Mini
69.4
Lech Mazur Writing
gpt-oss-120b leads by +15.4
Lech Mazur Writing · evaluates creative writing ability, assessing prose quality, narrative coherence, and stylistic sophistication.
gpt-oss-120b
77.1
o3 Mini
61.7
Lmca
gpt-oss-120b leads by +3.7
gpt-oss-120b
26.1
o3 Mini
22.3
Mystery Game Puzzles
gpt-oss-120b
0.0
o3 Mini
0.0
OTIS Mock AIME 2024-2025
gpt-oss-120b leads by +12.0
OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
gpt-oss-120b
88.9
o3 Mini
76.9
SimpleBench
o3 Mini leads by +0.8
SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking.
gpt-oss-120b
6.5
o3 Mini
7.4
SimpleQA Verified
o3 Mini leads by +1.4
SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information.
gpt-oss-120b
13.9
o3 Mini
15.3
WeirdML
gpt-oss-120b leads by +4.5
WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns.
gpt-oss-120b
48.2
o3 Mini
43.7
Full benchmark table
| Benchmark | gpt-oss-120b | o3 Mini |
|---|---|---|
Aider polyglot Aider Polyglot · measures how well AI models can edit code across multiple programming languages using the Aider coding assistant framework. | 41.8 | 60.4 |
Chatbot Arena Elo · Overall | 1351.6 | 1348.1 |
Chess Puzzles Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities. | 15.8 | 10.6 |
Dtbench | 60.5 | 48.0 |
Fiction.LiveBench Fiction.LiveBench · a continuously updated benchmark using recently published fiction to test reading comprehension and reasoning, preventing data contamination. | 44.4 | 50.0 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 67.7 | 69.4 |
Lech Mazur Writing Lech Mazur Writing · evaluates creative writing ability, assessing prose quality, narrative coherence, and stylistic sophistication. | 77.1 | 61.7 |
Lmca | 26.1 | 22.3 |
Mystery Game Puzzles | 0.0 | 0.0 |
OTIS Mock AIME 2024-2025 OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills. | 88.9 | 76.9 |
SimpleBench SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking. | 6.5 | 7.4 |
SimpleQA Verified SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information. | 13.9 | 15.3 |
WeirdML WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns. | 48.2 | 43.7 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $0.04 | $0.17 | 131K tokens (~66 books) | $0.70 | |
| $1.10 | $4.40 | 200K tokens (~100 books) | $19.25 |
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