Compare · ModelsLive · 2 picked · head to head
Claude 3.5 Sonnet vs gpt-oss-120b
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
gpt-oss-120b wins on 7/13 benchmarks
gpt-oss-120b wins 7 of 13 shared benchmarks. Leads in knowledge · math · reasoning.
Category leads
coding·Claude 3.5 Sonnetarena·Claude 3.5 Sonnetknowledge·gpt-oss-120blanguage·Claude 3.5 Sonnetmath·gpt-oss-120breasoning·gpt-oss-120bsafety·Claude 3.5 Sonnet
Hype vs Reality
Attention vs performance
Claude 3.5 Sonnet
#127 by perf·no signal
gpt-oss-120b
#106 by perf·no signal
Vendor risk
Who is behind the model
Anthropic
$380.0B·Tier 1
OpenAI
$840.0B·Tier 1
Head to head
13 benchmarks · 2 models
Claude 3.5 Sonnetgpt-oss-120b
Aider polyglot
Claude 3.5 Sonnet leads by +9.8
Aider Polyglot · measures how well AI models can edit code across multiple programming languages using the Aider coding assistant framework.
Claude 3.5 Sonnet
51.6
gpt-oss-120b
41.8
Chatbot Arena Elo · Overall
Claude 3.5 Sonnet leads by +17.5
Claude 3.5 Sonnet
1371.4
gpt-oss-120b
1353.8
GPQA diamond
gpt-oss-120b leads by +29.0
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
Claude 3.5 Sonnet
38.7
gpt-oss-120b
67.7
HELM · GPQA
gpt-oss-120b leads by +11.9
Claude 3.5 Sonnet
56.5
gpt-oss-120b
68.4
HELM · IFEval
Claude 3.5 Sonnet leads by +2.0
Claude 3.5 Sonnet
85.6
gpt-oss-120b
83.6
HELM · MMLU-Pro
gpt-oss-120b leads by +1.8
Claude 3.5 Sonnet
77.7
gpt-oss-120b
79.5
HELM · Omni-MATH
gpt-oss-120b leads by +41.2
Claude 3.5 Sonnet
27.6
gpt-oss-120b
68.8
HELM · WildBench
gpt-oss-120b leads by +5.3
Claude 3.5 Sonnet
79.2
gpt-oss-120b
84.5
Lech Mazur Writing
Claude 3.5 Sonnet leads by +3.0
Lech Mazur Writing · evaluates creative writing ability, assessing prose quality, narrative coherence, and stylistic sophistication.
Claude 3.5 Sonnet
80.3
gpt-oss-120b
77.3
OTIS Mock AIME 2024-2025
gpt-oss-120b leads by +82.4
OTIS Mock AIME 2024–2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
Claude 3.5 Sonnet
6.4
gpt-oss-120b
88.9
Fortress
Claude 3.5 Sonnet leads by +4.7
Claude 3.5 Sonnet
13.0
gpt-oss-120b
8.2
SimpleBench
Claude 3.5 Sonnet leads by +6.5
SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking.
Claude 3.5 Sonnet
13.0
gpt-oss-120b
6.5
WeirdML
gpt-oss-120b leads by +17.2
WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns.
Claude 3.5 Sonnet
31.0
gpt-oss-120b
48.2
Full benchmark table
| Benchmark | Claude 3.5 Sonnet | gpt-oss-120b |
|---|---|---|
Aider polyglot Aider Polyglot · measures how well AI models can edit code across multiple programming languages using the Aider coding assistant framework. | 51.6 | 41.8 |
Chatbot Arena Elo · Overall | 1371.4 | 1353.8 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 38.7 | 67.7 |
HELM · GPQA | 56.5 | 68.4 |
HELM · IFEval | 85.6 | 83.6 |
HELM · MMLU-Pro | 77.7 | 79.5 |
HELM · Omni-MATH | 27.6 | 68.8 |
HELM · WildBench | 79.2 | 84.5 |
Lech Mazur Writing Lech Mazur Writing · evaluates creative writing ability, assessing prose quality, narrative coherence, and stylistic sophistication. | 80.3 | 77.3 |
OTIS Mock AIME 2024-2025 OTIS Mock AIME 2024–2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills. | 6.4 | 88.9 |
Fortress | 13.0 | 8.2 |
SimpleBench SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking. | 13.0 | 6.5 |
WeirdML WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns. | 31.0 | 48.2 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| Claude 3.5 Sonnet | — | — | — | — |
| gpt-oss-120b | $0.04 | $0.19 | 131K tokens (~66 books) | $0.77 |