GPT-4o vs Kimi-k1.5
Kimi-k1.5 leads the LLM Stats Score 17.3 to 14.3.
OpenAI · Moonshot AI · Updated for 2026
Which is better?
Kimi-k1.5 leads the overall LLM Stats Score 17.3 to 14.3, ranking #205 overall.
In the 5 individual benchmarks reported for both models, Kimi-k1.5 wins 4; 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-4o
- you want predictable pricing at $2.50/M input and $10.00/M output
Choose Kimi-k1.5
- overall performance matters — it scores 17.3 and ranks #205 on LLM Stats
- you value its reported benchmark strengths — it wins 4 of 5 exact shared results
- you want the most recent training data — it shipped Jan 2025
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
38 reported for GPT-4o · 9 for Kimi-k1.5
GPT-4o outperforms in 1 benchmarks (MMMU), while Kimi-k1.5 is better at 4 benchmarks (AIME 2024, IFEval, MathVista, MMLU).
Kimi-k1.5 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-4o specifies input context (128,000 tokens). Only GPT-4o specifies output context (16,384 tokens).
Input capabilities
Documented input modalities across available providers
Both GPT-4o and Kimi-k1.5 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
GPT-4o
Kimi-k1.5
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
GPT-4o was released on 2024-08-06, while Kimi-k1.5 was released on 2025-01-20.
Kimi-k1.5 is 6 months newer than GPT-4o.
Aug 6, 2024
2.1 years ago
Jan 20, 2025
1.6 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 GPT-4o and Kimi-k1.5 side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-4o vs Kimi-k1.5.