GPT OSS 120B vs Phi-3.5-MoE-instruct
GPT OSS 120B leads the LLM Stats Score 28.9 to 2.0.
OpenAI · Microsoft · Updated for 2026
Which is better?
GPT OSS 120B leads the overall LLM Stats Score 28.9 to 2.0, ranking #130 overall.
In the 2 individual benchmarks reported for both models, GPT OSS 120B wins 2; this is a narrower head-to-head signal than the composite indexes.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose GPT OSS 120B
- overall performance matters — it scores 28.9 and ranks #130 on LLM Stats
- your work emphasizes reasoning — it leads those capability indexes
- you value its reported benchmark strengths — it wins 2 of 2 exact shared results
- you want the most recent training data — it shipped Aug 2025
Choose Phi-3.5-MoE-instruct
- you are already invested in the Microsoft ecosystem
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
7 reported for GPT OSS 120B · 31 for Phi-3.5-MoE-instruct
GPT OSS 120B outperforms in 2 benchmarks (GPQA, MMLU), while Phi-3.5-MoE-instruct is better at 0 benchmarks.
GPT OSS 120B significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Model Size
Parameter count comparison
GPT OSS 120B has 56.8B more parameters than Phi-3.5-MoE-instruct, making it 94.7% larger.
Context Window
Maximum input and output token capacity
Only GPT OSS 120B specifies input context (131,072 tokens). Only GPT OSS 120B specifies output context (131,072 tokens).
License
Usage and distribution terms
GPT OSS 120B is licensed under Apache 2.0, while Phi-3.5-MoE-instruct uses MIT.
License differences may affect how you can use these models in commercial or open-source projects.
Apache 2.0
Open weights
MIT
Open weights
Release Timeline
When each model was launched
GPT OSS 120B was released on 2025-08-05, while Phi-3.5-MoE-instruct was released on 2024-08-23.
GPT OSS 120B is 12 months newer than Phi-3.5-MoE-instruct.
Aug 5, 2025
1.1 years ago
11mo newerAug 23, 2024
2.0 years ago
Knowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT OSS 120B and Phi-3.5-MoE-instruct side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT OSS 120B vs Phi-3.5-MoE-instruct.