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openai/gpt-oss-20b

LM-STUDIO MLX

gpt_oss · 20B · MXFP4

Not Rec.

Sep 29, 2026 · Apple M5 Max

gpt-oss:20b

OLLAMA GGUF

gptoss · 20.9B · MXFP4

Excellent

Mar 5, 2026 · Intel Core™ Ultra 9 285K

Global Score
83 vs 95
Hardware Fit
80 vs 98
Quality Score
84 vs 94

Hardware

openai/gpt-oss-20b gpt-oss:20b
MachineMacBook ProASUS
CPUApple M5 MaxIntel Core™ Ultra 9 285K
Cores1824
RAM128 GB47 GB
GPUApple M5 MaxNVIDIA GeForce RTX 5090, Intel(R) Graphics
OSmacOS 26.6.2Microsoft Windows 11 Pro 10.0.26200
Archarm64x64
Power Modebalancedbalanced

Performance

openai/gpt-oss-20b gpt-oss:20b
Tokens/sec138.4239.9
First chunk3 ms180 ms
TTFT30.0 s616 ms
Load time6.8 s4.3 s
Memory usage0.5 GB13.9 GB
Memory %0%29%

HW Fit Score Breakdown

openai/gpt-oss-20b

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

gpt-oss:20b

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

Quality

openai/gpt-oss-20b

Reasoning
18/20
Coding
12/20
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

gpt-oss:20b

Reasoning
19/20
Coding
19/20
Instruction
17/20
Structured
14/15
Math
15/15
Multilingual
10/10
Reasoning: Strong Coding: Strong Instruction Following: Strong Structured Output: Strong Math: Strong Multilingual: Strong
View openai/gpt-oss-20b details | View gpt-oss:20b details

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