Comprehensive side-by-side LLM comparison
o3 leads with 12.4% higher average benchmark score. o3 offers 37.9K more tokens in context window than Kimi K2 Instruct. Kimi K2 Instruct is $7.13 cheaper per million tokens. o3 supports multimodal inputs. Overall, o3 is the stronger choice for coding tasks.
Moonshot AI
Kimi K2 Instruct was developed as the instruction-tuned version of Kimi K2, designed to follow user instructions reliably across diverse tasks. Built to serve general-purpose conversational and task-completion applications, it provides Moonshot's accessible interface for language AI.
OpenAI
o3 represents the next generation in OpenAI's reasoning model series, developed to advance the capabilities of deliberate, step-by-step problem solving. Built to handle increasingly complex challenges across mathematics, science, and coding, it continues the evolution of reasoning-focused AI with improved analytical depth and accuracy.
2 months newer

o3
OpenAI
2025-04-16

Kimi K2 Instruct
Moonshot AI
2025-07-11
Cost per million tokens (USD)

Kimi K2 Instruct

o3
Context window and performance specifications
Average performance across 9 common benchmarks

Kimi K2 Instruct

o3
Performance comparison across key benchmark categories

Kimi K2 Instruct

o3
o3
2024-05-31
Available providers and their performance metrics

Kimi K2 Instruct
Novita

o3

Kimi K2 Instruct

o3

Kimi K2 Instruct

o3
OpenAI