Grok 4.3 vs Kimi K3 (Comparative Analysis)
Loading comparison form...
Want to try out these models side by side?Try Magica for free
Overview
Grok 4.3 was released 2 months before Kimi K3.
 Grok 4.3 |  Kimi K3 | |
|---|---|---|
Model Provider The organization behind this AI's development | XAI | MoonshotAI |
Input Context Window Maximum input tokens this model can process at once | 1M tokens | 1M tokens |
Output Token Limit Maximum output tokens this model can generate at once | Not specified tokens | Not specified tokens |
Release Date When this model first became publicly available | April 30, 2026 2 months ago April 30th, 2026 | July 16, 2026 10 days ago July 16th, 2026 |
Capabilities & Features
Compare supported features, modalities, and advanced capabilities
Grok 4.3 | Kimi K3 | |
|---|---|---|
Input Types Supported input formats | 📝Text🖼️Image📁File | 📝Text🖼️Image |
Reasoning Controls Defaults and configurable reasoning effort | Enabled by defaultEffort: High, Medium, Low, NoneDefault: Low | Enabled by defaultEffort: Max, High, LowDefault: Max |
Output Types Supported output formats | 📝Text | 📝Text |
Tokenizer Text encoding system | Grok | Other |
Key Features Advanced capabilities | ✓Function Calling✓Structured Output✓Reasoning ModeContent Moderation | ✓Function Calling✓Structured Output✓Reasoning ModeContent Moderation |
Pricing
Grok 4.3 is roughly 0.4x less expensive compared to Kimi K3 for input tokens and roughly 0.2x less expensive for output tokens.
| Grok 4.3 | Kimi K3 | |
|---|---|---|
Short Context Pricing Base rates before a long-context threshold applies | ||
Input Token Cost Cost per million input tokens | $1.25 per million tokens | $3.00 per million tokens |
Output Token Cost Cost per million output tokens | $2.50 per million tokens | $15.00 per million tokens |
Web Search Cost Additional cost for each web search operation | $0.005 per search | Not specified |
Cache Read Cost Cost to reuse cached input tokens | $0.20 per million tokens | $0.30 per million tokens |
Long Context Pricing Rates for prompts with 200,000 or more tokens | ||
Input Token Cost Long-context input cost per million tokens | $2.50 per million tokens | Not specified |
Output Token Cost Long-context output cost per million tokens | $5.00 per million tokens | Not specified |
Cache Read Cost Long-context cache read cost per million tokens | $0.40 per million tokens | Not specified |
Benchmarks
Compare relevant benchmarks between Grok 4.3 and Kimi K3.
| Grok 4.3 | Kimi K3 | |
|---|---|---|
Intelligence Index Overall model quality across independent evaluations | 37.6 (Artificial Analysis index; higher is better) | 57.1 (Artificial Analysis index; higher is better) |
Coding Index Programming performance across independent evaluations | 42.2 (Artificial Analysis index; higher is better) | 76.2 (Artificial Analysis index; higher is better) |
Agentic Index Ability to complete multi-step agentic tasks | 24.1 (Artificial Analysis index; higher is better) | 50.1 (Artificial Analysis index; higher is better) |
Best Design Arena Score Highest human-preference Elo score across design arenas | 1,235 Elo (#38 in Game Dev (49.5% win rate)) | 1,458 Elo (#1 in 3D (69.7% win rate)) |
At a Glance
Quick overview of what makes Grok 4.3 and Kimi K3 unique.
Grok 4.3 by XAI 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. Reasonably priced at $1.25/M input and $2.50/M output tokens. Released April 30th, 2026.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.Explore More Comparisons
Compare your models with top performers across different categories
Compare Grok 4.3 with:
🚀Programming
Best models for coding and development
🎨Creative & Roleplay
Models optimized for creative writing
📢Marketing
Content creation and marketing tasks
💻Technology
Technical analysis and explanations
🔬Science
Scientific research and analysis
🌐Translation
Multilingual translation tasks
Compare Kimi K3 with:
🚀Programming
Best models for coding and development
🎨Creative & Roleplay
Models optimized for creative writing
📢Marketing
Content creation and marketing tasks
💻Technology
Technical analysis and explanations
🔬Science
Scientific research and analysis
🌐Translation
Multilingual translation tasks