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openai/gpt-oss-20b

LM-STUDIO GGUF

gpt-oss · 20B · MXFP4

Excellent

Nov 9, 2026 · Apple M3 Max

openai/gpt-oss-20b

LM-STUDIO MLX

gpt_oss · 20B · MXFP4

Not Rec.

Oct 20, 2026 · Apple M1 Pro

Global Score
91 vs 83
Hardware Fit
90 vs 75
Quality Score
91 vs 87

Hardware

openai/gpt-oss-20b openai/gpt-oss-20b
MachineMacBook ProMacBook Pro
CPUApple M3 MaxApple M1 Pro
Cores1610
RAM128 GB32 GB
GPUApple M3 MaxApple M1 Pro
OSmacOS 27.2macOS 15.6.1
Archarm64arm64
Power Modebalancedbalanced

Performance

openai/gpt-oss-20b openai/gpt-oss-20b
Tokens/sec95.143.2
First chunk3 ms46 ms
TTFT2.5 s30.0 s
Load time9.2 sN/A
Memory usage0.0 GB15.8 GB
Memory %0%49%

HW Fit Score Breakdown

openai/gpt-oss-20b

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

openai/gpt-oss-20b

Speed
50/50
TTFT
0/20
Memory
25/30

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

openai/gpt-oss-20b

Reasoning
19/20
Coding
14/20
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
View openai/gpt-oss-20b details | View openai/gpt-oss-20b details

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$ npm install -g metrillm@latest
$ metrillm

Requires Node 20+ and Ollama or LM Studio running

Or run without installing: npx metrillm@latest