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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

OLLAMA GGUF

qwen35 · 4.2B · Q4_K_M

Excellent

Oct 12, 2026 · AMD Ryzen 5 5500

Global Score
84 vs 81
Hardware Fit
65 vs 98
Quality Score
92 vs 74

Hardware

openai/gpt-oss-20b qwen3.5:4b
MachineASUSMicrosoft WSL
CPUAMD Ryzen 7 7800X3D 8-Core ProcessorAMD Ryzen 5 5500
Cores1612
RAM31 GB8 GB
GPUNVIDIA GeForce RTX 4090, RaphaelIntegrated / Unknown
OScachyos rollingUbuntu 26.04.1 LTS
Archx64x64
Power Modeperformanceunknown

Performance

openai/gpt-oss-20b qwen3.5:4b
Tokens/sec221.593.7
First chunk5 ms249 ms
TTFT30.0 s249 ms
Load timeN/A10.1 s
Memory usage21.1 GB2.9 GB
Memory %69%38%

HW Fit Score Breakdown

openai/gpt-oss-20b

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

qwen3.5:4b

Speed
50/50
TTFT
20/20
Memory
28/30

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

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

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