Compare · ModelsLive · 2 picked · head to head
gpt-oss-120b vs Claude Sonnet 4
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Claude Sonnet 4 wins on 5/7 benchmarks
Claude Sonnet 4 wins 5 of 7 shared benchmarks. Leads in coding · knowledge · reasoning.
Category leads
coding·Claude Sonnet 4knowledge·Claude Sonnet 4math·gpt-oss-120breasoning·Claude Sonnet 4
Hype vs Reality
Attention vs performance
gpt-oss-120b
#108 by perf·no signal
Claude Sonnet 4
#117 by perf·no signal
Best value
gpt-oss-120b
86.4x better value than Claude Sonnet 4
gpt-oss-120b
428.3 pts/$
$0.11/M
Claude Sonnet 4
5.0 pts/$
$9.00/M
Vendor risk
Who is behind the model
OpenAI
$840.0B·Tier 1
Anthropic
$380.0B·Tier 1
Head to head
7 benchmarks · 2 models
gpt-oss-120bClaude Sonnet 4
Aider polyglot
Claude Sonnet 4 leads by +19.5
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
Claude Sonnet 4
61.3
Fiction.LiveBench
Claude Sonnet 4 leads by +2.5
Fiction.LiveBench · a continuously updated benchmark using recently published fiction to test reading comprehension and reasoning, preventing data contamination.
gpt-oss-120b
44.4
Claude Sonnet 4
46.9
GPQA diamond
Claude Sonnet 4 leads by +4.6
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
Claude Sonnet 4
72.3
OTIS Mock AIME 2024-2025
gpt-oss-120b leads by +17.8
OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
gpt-oss-120b
88.9
Claude Sonnet 4
71.1
SimpleBench
Claude Sonnet 4 leads by +28.1
SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking.
gpt-oss-120b
6.5
Claude Sonnet 4
34.6
SWE-Bench Verified (Bash Only)
Claude Sonnet 4 leads by +38.9
SWE-Bench Verified (Bash Only) · a curated subset of SWE-bench where models fix real Python repository bugs using only bash commands, no agent frameworks.
gpt-oss-120b
26.0
Claude Sonnet 4
64.9
WeirdML
gpt-oss-120b leads by +2.1
WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns.
gpt-oss-120b
48.2
Claude Sonnet 4
46.1
Full benchmark table
| Benchmark | gpt-oss-120b | Claude Sonnet 4 |
|---|---|---|
Aider polyglot Aider Polyglot · measures how well AI models can edit code across multiple programming languages using the Aider coding assistant framework. | 41.8 | 61.3 |
Fiction.LiveBench Fiction.LiveBench · a continuously updated benchmark using recently published fiction to test reading comprehension and reasoning, preventing data contamination. | 44.4 | 46.9 |
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 | 72.3 |
OTIS Mock AIME 2024-2025 OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills. | 88.9 | 71.1 |
SimpleBench SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking. | 6.5 | 34.6 |
SWE-Bench Verified (Bash Only) SWE-Bench Verified (Bash Only) · a curated subset of SWE-bench where models fix real Python repository bugs using only bash commands, no agent frameworks. | 26.0 | 64.9 |
WeirdML WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns. | 48.2 | 46.1 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $0.04 | $0.18 | 131K tokens (~66 books) | $0.74 | |
| $3.00 | $15.00 | 1.0M tokens (~500 books) | $60.00 |