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openai/gpt-oss-20b

LM-STUDIO GGUF

gpt-oss · 20B · MXFP4

Excellent

Nov 9, 2026 · Apple M3 Max

gpt-oss:20b

OLLAMA GGUF

gptoss · 20.9B · MXFP4

Excellent

May 25, 2026 · Apple M4 Pro

Global Score
91 vs 94
Hardware Fit
90 vs 92
Quality Score
91 vs 95

Hardware

openai/gpt-oss-20b gpt-oss:20b
MachineMacBook ProMacBook Pro
CPUApple M3 MaxApple M4 Pro
Cores1614
RAM128 GB48 GB
GPUApple M3 MaxApple M4 Pro
OSmacOS 27.2macOS 26.4.1
Archarm64arm64
Power Modebalancedbalanced

Performance

openai/gpt-oss-20b gpt-oss:20b
Tokens/sec95.154.5
First chunk3 ms318 ms
TTFT2.5 s2.9 s
Load time9.2 s4.0 s
Memory usage0.0 GB16.4 GB
Memory %0%34%

HW Fit Score Breakdown

openai/gpt-oss-20b

Speed
50/50
TTFT
10/20
Memory
30/30

gpt-oss:20b

Speed
50/50
TTFT
13/20
Memory
29/30

Quality

openai/gpt-oss-20b

Reasoning
18/20
Coding
15/20
Instruction
18/20
Structured
15/15
Math
15/15
Multilingual
10/10
Reasoning: Strong Coding: Strong Instruction Following: Strong 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
View openai/gpt-oss-20b details | View gpt-oss:20b details

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