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openai/gpt-oss-20b

LM-STUDIO MLX

gpt_oss · 20B · MXFP4

Not Rec.

Sep 29, 2026 · Apple M5 Max

openai/gpt-oss-20b

LM-STUDIO GGUF

gpt-oss · 20B · MXFP4

Excellent

Nov 9, 2026 · Apple M3 Max

Global Score
83 vs 91
Hardware Fit
80 vs 90
Quality Score
84 vs 91

Hardware

openai/gpt-oss-20b openai/gpt-oss-20b
MachineMacBook ProMacBook Pro
CPUApple M5 MaxApple M3 Max
Cores1816
RAM128 GB128 GB
GPUApple M5 MaxApple M3 Max
OSmacOS 26.6.2macOS 27.2
Archarm64arm64
Power Modebalancedbalanced

Performance

openai/gpt-oss-20b openai/gpt-oss-20b
Tokens/sec138.495.1
First chunk3 ms3 ms
TTFT30.0 s2.5 s
Load time6.8 s9.2 s
Memory usage0.5 GB0.0 GB
Memory %0%0%

HW Fit Score Breakdown

openai/gpt-oss-20b

Speed
50/50
TTFT
0/20
Memory
30/30

openai/gpt-oss-20b

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

Quality

openai/gpt-oss-20b

Reasoning
18/20
Coding
12/20
Instruction
15/20
Structured
14/15
Math
15/15
Multilingual
10/10
Reasoning: Strong Coding: Adequate Instruction Following: Strong Structured Output: Strong Math: Strong Multilingual: Strong

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
View openai/gpt-oss-20b details | View openai/gpt-oss-20b details

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