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openai/gpt-oss-20b

LM-STUDIO GGUF

gpt-oss · 20B · MXFP4

Not Rec.

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

qwen3.5:4b-mlx

OLLAMA GGUF

nvfp4

Good

Aug 25, 2026 · Apple M1 Pro

Global Score
84 vs 68
Hardware Fit
65 vs 91
Quality Score
92 vs 58

Hardware

openai/gpt-oss-20b qwen3.5:4b-mlx
MachineASUSMacBook Pro
CPUAMD Ryzen 7 7800X3D 8-Core ProcessorApple M1 Pro
Cores1610
RAM31 GB16 GB
GPUNVIDIA GeForce RTX 4090, RaphaelApple M1 Pro
OScachyos rollingmacOS 26.6.2
Archx64arm64
Power Modeperformancebalanced

Performance

openai/gpt-oss-20b qwen3.5:4b-mlx
Tokens/sec221.542.2
First chunk5 ms201 ms
TTFT30.0 s4.4 s
Load timeN/A0.0 s
Memory usage21.1 GB3.8 GB
Memory %69%24%

HW Fit Score Breakdown

openai/gpt-oss-20b

Speed
50/50
TTFT
0/20
Memory
15/30

qwen3.5:4b-mlx

Speed
50/50
TTFT
11/20
Memory
30/30

Quality

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

qwen3.5:4b-mlx

Reasoning
16/20
Coding
2/20
Instruction
13/20
Structured
7/15
Math
11/15
Multilingual
9/10
Reasoning: Strong Coding: Poor Instruction Following: Adequate Structured Output: Weak Math: Adequate Multilingual: Strong
View openai/gpt-oss-20b details | View qwen3.5:4b-mlx details

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