openai/gpt-oss-20b
LM-STUDIO MLXgpt_oss · 20B · MXFP4
Jul 17, 2026 · Apple M5 Max
gpt-oss:20b
OLLAMA GGUFgptoss · 20.9B · MXFP4
May 25, 2026 · Apple M4 Pro
Global Score
83 vs 94
Hardware Fit
80 vs 92
Quality Score
84 vs 95
Hardware
openai/gpt-oss-20b gpt-oss:20b
MachineMacBook ProMacBook Pro
CPUApple M5 MaxApple M4 Pro
Cores1814
RAM64 GB48 GB
GPUApple M5 MaxApple M4 Pro
OSmacOS 27.0macOS 26.4.1
Archarm64arm64
Power Modebalancedbalanced
Performance
openai/gpt-oss-20b gpt-oss:20b
Tokens/sec131.754.5
First chunk7 ms318 ms
TTFT30.0 s2.9 s
Load timeN/A4.0 s
Memory usage15.8 GB16.4 GB
Memory %25%34%
HW Fit Score Breakdown
openai/gpt-oss-20b
Speed
50/50
TTFT
0/20
Memory
30/30
gpt-oss:20b
Speed
50/50
TTFT
13/20
Memory
29/30
Quality
openai/gpt-oss-20b
Reasoning
18/20
Coding
13/20
Instruction
14/20
Structured
14/15
Math
15/15
Multilingual
10/10
Reasoning: Strong Coding: Adequate Instruction Following: Adequate Structured Output: Strong Math: Strong Multilingual: Strong
gpt-oss:20b
Reasoning
19/20
Coding
19/20
Instruction
17/20
Structured
15/15
Math
15/15
Multilingual
10/10
Reasoning: Strong Coding: Strong Instruction Following: Strong Structured Output: Strong Math: Strong Multilingual: Strong
Run yours and compare
$
npm install -g metrillm@latest$
metrillmRequires Node 20+ and Ollama or LM Studio running
Or run without installing: npx metrillm@latest