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gpt-oss:20b

OLLAMA GGUF

gptoss · 20.9B · MXFP4

Excellent

May 25, 2026 · Apple M4 Pro

openai/gpt-oss-20b

LM-STUDIO MLX

gpt_oss · 20B · MXFP4

Not Rec.

Jul 17, 2026 · Apple M5 Max

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

Hardware

gpt-oss:20b openai/gpt-oss-20b
MachineMacBook ProMacBook Pro
CPUApple M4 ProApple M5 Max
Cores1418
RAM48 GB64 GB
GPUApple M4 ProApple M5 Max
OSmacOS 26.4.1macOS 27.0
Archarm64arm64
Power Modebalancedbalanced

Performance

gpt-oss:20b openai/gpt-oss-20b
Tokens/sec54.5131.7
First chunk318 ms7 ms
TTFT2.9 s30.0 s
Load time4.0 sN/A
Memory usage16.4 GB15.8 GB
Memory %34%25%

HW Fit Score Breakdown

gpt-oss:20b

Speed
50/50
TTFT
13/20
Memory
29/30

openai/gpt-oss-20b

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

Quality

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

openai/gpt-oss-20b

Reasoning
18/20
Coding
13/20
Instruction
14/20
Structured
14/15
Math
15/15
Multilingual
10/10
Reasoning: Strong Coding: Adequate Instruction Following: Adequate Structured Output: Strong Math: Strong Multilingual: Strong
View gpt-oss:20b details | View openai/gpt-oss-20b details

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Or run without installing: npx metrillm@latest