Grok-1.5 vs o1-mini
o1-mini leads the LLM Stats Score 10.1 to -2.5.
xAI · OpenAI · Updated for 2026
Which is better?
o1-mini leads the overall LLM Stats Score 10.1 to -2.5, ranking #255 overall.
In the 3 individual benchmarks reported for both models, o1-mini wins 3; 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 Grok-1.5
- you are already invested in the xAI ecosystem
Choose o1-mini
- overall performance matters — it scores 10.1 and ranks #255 on LLM Stats
- your work emphasizes reasoning — it leads those capability indexes
- you value its reported benchmark strengths — it wins 3 of 3 exact shared results
- you want the most recent training data — it shipped Sep 2024
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
9 reported for Grok-1.5 · 6 for o1-mini
Grok-1.5 outperforms in 0 benchmarks, while o1-mini is better at 3 benchmarks (GPQA, HumanEval, MMLU).
o1-mini 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 o1-mini specifies input context (128,000 tokens). Only o1-mini specifies output context (65,536 tokens).
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
Grok-1.5 was released on 2024-03-28, while o1-mini was released on 2024-09-12.
o1-mini is 6 months newer than Grok-1.5.
Mar 28, 2024
2.4 years ago
Sep 12, 2024
2.0 years ago
5mo newerKnowledge 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 Grok-1.5 and o1-mini side-by-side, then vote on the output you prefer.
FAQ
Common questions about Grok-1.5 vs o1-mini.