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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

Not Rec.

Jul 5, 2026 · AMD Ryzen 7 7800X3D 8-Core Processor

Global Score
83 vs 84
Hardware Fit
80 vs 65
Quality Score
84 vs 92

Hardware

openai/gpt-oss-20b openai/gpt-oss-20b
MachineMacBook ProASUS
CPUApple M5 MaxAMD Ryzen 7 7800X3D 8-Core Processor
Cores1816
RAM128 GB31 GB
GPUApple M5 MaxNVIDIA GeForce RTX 4090, Raphael
OSmacOS 26.6.2cachyos rolling
Archarm64x64
Power Modebalancedperformance

Performance

openai/gpt-oss-20b openai/gpt-oss-20b
Tokens/sec138.4221.5
First chunk3 ms5 ms
TTFT30.0 s30.0 s
Load time6.8 sN/A
Memory usage0.5 GB21.1 GB
Memory %0%69%

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
0/20
Memory
15/30

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
19/20
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

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