Kimi K3 vs o3 Mini (Comparative Analysis)
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Overview
o3 Mini was released 1 year before Kimi K3.
 Kimi K3 |  o3 Mini | |
|---|---|---|
Model Provider The organization behind this AI's development | MoonshotAI | OpenAI |
Input Context Window Maximum input tokens this model can process at once | 1M tokens | 200K tokens |
Output Token Limit Maximum output tokens this model can generate at once | Not specified tokens | 100K tokens |
Release Date When this model first became publicly available | July 16, 2026 11 days ago July 16th, 2026 | January 31, 2025 1 year ago January 31st, 2025 |
Knowledge Cutoff Latest training-data date reported by the provider | Not reported | October 31, 2023 |
Capabilities & Features
Compare supported features, modalities, and advanced capabilities
Kimi K3 | o3 Mini | |
|---|---|---|
Input Types Supported input formats | 📝Text🖼️Image | 📝Text📁File |
Reasoning Controls Defaults and configurable reasoning effort | Enabled by defaultEffort: Max, High, LowDefault: Max | Optional |
Output Types Supported output formats | 📝Text | 📝Text |
Tokenizer Text encoding system | Other | GPT |
Key Features Advanced capabilities | ✓Function Calling✓Structured Output✓Reasoning ModeContent Moderation | ✓Function Calling✓Structured Output✓Reasoning Mode✓Content Moderation |
Pricing
Kimi K3 is roughly 2.7x more expensive compared to o3 Mini for input tokens and roughly 3.4x more expensive for output tokens.
| Kimi K3 | o3 Mini | |
|---|---|---|
Input Token Cost Cost per million input tokens | $3.00 per million tokens | $1.10 per million tokens |
Output Token Cost Cost per million output tokens | $15.00 per million tokens | $4.40 per million tokens |
Web Search Cost Additional cost for each web search operation | Not specified | $0.01 per search |
Cache Read Cost Cost to reuse cached input tokens | $0.30 per million tokens | $0.55 per million tokens |
Benchmarks
Compare relevant benchmarks between Kimi K3 and o3 Mini.
| Kimi K3 | o3 Mini | |
|---|---|---|
Intelligence Index Overall model quality across independent evaluations | 57.1 (Artificial Analysis index; higher is better) | Benchmark not available. |
Coding Index Programming performance across independent evaluations | 76.2 (Artificial Analysis index; higher is better) | Benchmark not available. |
Agentic Index Ability to complete multi-step agentic tasks | 50.1 (Artificial Analysis index; higher is better) | Benchmark not available. |
Best Design Arena Score Highest human-preference Elo score across design arenas | 1,456 Elo (#1 in 3D (69.2% win rate)) | Benchmark not available. |
At a Glance
Quick overview of what makes Kimi K3 and o3 Mini unique.
Kimi K3 by MoonshotAI understands both text and images, can use external tools and APIs, offers advanced reasoning, generates structured data. It can handle standard conversations with its 1M token context window. Premium pricing at $3.00/M input and $15.00/M output tokens. Released July 16th, 2026.o3 Mini by OpenAI can use external tools and APIs, offers advanced reasoning, generates structured data. It can handle standard conversations with its 200K token context window. Reasonably priced at $1.10/M input and $4.40/M output tokens. Includes built-in content moderation for safer outputs. Released January 31st, 2025.Explore More Comparisons
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Models optimized for creative writing
📢Marketing
Content creation and marketing tasks
💻Technology
Technical analysis and explanations
🔬Science
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🌐Translation
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