GPT-5.1 Thinking vs Phi-3.5-MoE-instruct
GPT-5.1 Thinking leads the LLM Stats Score 36.6 to 1.9.
OpenAI · Microsoft · Updated for 2026
Which is better?
GPT-5.1 Thinking leads the overall LLM Stats Score 36.6 to 1.9, ranking #74 overall.
In the 1 individual benchmarks reported for both models, GPT-5.1 Thinking wins 1; 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-5.1 Thinking
- overall performance matters — it scores 36.6 and ranks #74 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you value its reported benchmark strengths — it wins 1 of 1 exact shared results
- you want the most recent training data — it shipped Nov 2025
Choose Phi-3.5-MoE-instruct
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
9 reported for GPT-5.1 Thinking · 31 for Phi-3.5-MoE-instruct
GPT-5.1 Thinking outperforms in 1 benchmarks (GPQA), while Phi-3.5-MoE-instruct is better at 0 benchmarks.
GPT-5.1 Thinking significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Context Window
Maximum input and output token capacity
Only GPT-5.1 Thinking specifies input context (400,000 tokens). Only GPT-5.1 Thinking specifies output context (128,000 tokens).
Input capabilities
Documented input modalities across available providers
GPT-5.1 Thinking supports multimodal inputs, whereas Phi-3.5-MoE-instruct does not.
GPT-5.1 Thinking can handle both text and other forms of data like images, making it suitable for multimodal applications.
GPT-5.1 Thinking
Phi-3.5-MoE-instruct
License
Usage and distribution terms
GPT-5.1 Thinking is licensed under a proprietary license, while Phi-3.5-MoE-instruct uses MIT.
License differences may affect how you can use these models in commercial or open-source projects.
Proprietary
Closed source
MIT
Open weights
Release Timeline
When each model was launched
GPT-5.1 Thinking was released on 2025-11-12, while Phi-3.5-MoE-instruct was released on 2024-08-23.
GPT-5.1 Thinking is 15 months newer than Phi-3.5-MoE-instruct.
Nov 12, 2025
10 months ago
1.2yr newerAug 23, 2024
2.1 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-5.1 Thinking and Phi-3.5-MoE-instruct side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-5.1 Thinking vs Phi-3.5-MoE-instruct.