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openai/gpt-oss-20b

LM-STUDIO GGUF

gpt-oss · 20B · MXFP4

Excellent

Nov 9, 2026 · Apple M3 Max

gptoss · 20.9B · MXFP4

OLLAMA GGUF

gptoss · 20.9 · MXFP4

Excellent

Jul 9, 2026 · Intel Core™ i5-10400

Global Score
91 vs 84
Hardware Fit
90 vs 69
Quality Score
91 vs 91

Hardware

openai/gpt-oss-20b gptoss · 20.9B · M…
MachineMacBook ProMac Pro
CPUApple M3 MaxIntel Core™ i5-10400
Cores1612
RAM128 GB32 GB
GPUApple M3 MaxAMD Radeon RX 6700 XT
OSmacOS 27.2macOS 26.5.1
Archarm64x64
Power Modebalancedbalanced

Performance

openai/gpt-oss-20b gptoss · 20.9B · M…
Tokens/sec95.117.5
First chunk3 ms643 ms
TTFT2.5 s7.7 s
Load time9.2 s0.0 s
Memory usage0.0 GB0.8 GB
Memory %0%3%

HW Fit Score Breakdown

openai/gpt-oss-20b

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

gptoss · 20.9B · MXFP4

Speed
34/50
TTFT
5/20
Memory
30/30

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

gptoss · 20.9B · MXFP4

Reasoning
19/20
Coding
19/20
Instruction
13/20
Structured
15/15
Math
15/15
Multilingual
10/10
Reasoning: Strong Coding: Strong Instruction Following: Adequate 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