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openai/gpt-oss-20b

LM-STUDIO MLX

gpt_oss · 20B · MXFP4

Not Rec.

Sep 29, 2026 · Apple M5 Max

gpt-oss:20b

OLLAMA GGUF

gptoss · 20.9B · MXFP4

Excellent

Jul 3, 2026 · AMD RYZEN AI MAX+ 395

Global Score
83 vs 94
Hardware Fit
80 vs 91
Quality Score
84 vs 95

Hardware

openai/gpt-oss-20b gpt-oss:20b
MachineMacBook ProFramework Desktop (AMD Ryzen AI Max 300 Series)
CPUApple M5 MaxAMD RYZEN AI MAX+ 395
Cores1832
RAM128 GB64 GB
GPUApple M5 MaxAMD Radeon(TM) 8060S Graphics
OSmacOS 26.6.2Microsoft Windows 11 Pro for Workstations 10.0.26200
Archarm64x64
Power Modebalancedbalanced

Performance

openai/gpt-oss-20b gpt-oss:20b
Tokens/sec138.448.0
First chunk3 ms357 ms
TTFT30.0 s2.3 s
Load time6.8 s0.2 s
Memory usage0.5 GB16.4 GB
Memory %0%26%

HW Fit Score Breakdown

openai/gpt-oss-20b

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

gpt-oss:20b

Speed
50/50
TTFT
11/20
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

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
$ metrillm

Requires Node 20+ and Ollama or LM Studio running

Or run without installing: npx metrillm@latest