Claude Opus 4.5 vs Kimi K2 Thinking (Comparative Analysis)
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Comparative Analysis: Claude Opus 4.5 vs. Kimi K2 Thinking
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Overview
Kimi K2 Thinking was released 18 days before Claude Opus 4.5.
 Claude Opus 4.5 |  Kimi K2 Thinking | |
|---|---|---|
Model Provider The organization behind this AI's development | Anthropic | MoonshotAI |
Input Context Window Maximum input tokens this model can process at once | 200K tokens | 262.1K tokens |
Output Token Limit Maximum output tokens this model can generate at once | 64K tokens | 100.4K tokens |
Release Date When this model first became publicly available | November 24, 2025 8 months ago November 24th, 2025 | November 6, 2025 8 months ago November 6th, 2025 |
Capabilities & Features
Compare supported features, modalities, and advanced capabilities
Claude Opus 4.5 | Kimi K2 Thinking | |
|---|---|---|
Input Types Supported input formats | 📁File🖼️Image📝Text | 📝Text |
Reasoning Controls Defaults and configurable reasoning effort | Optional | Always enabled |
Output Types Supported output formats | 📝Text | 📝Text |
Tokenizer Text encoding system | Claude | Other |
Key Features Advanced capabilities | ✓Function Calling✓Structured Output✓Reasoning Mode✓Content Moderation | ✓Function Calling✓Structured Output✓Reasoning ModeContent Moderation |
Open Source Model availability | Proprietary | Available on HuggingFace → |
Pricing
Claude Opus 4.5 is roughly 8.3x more expensive compared to Kimi K2 Thinking for input tokens and roughly 10.0x more expensive for output tokens.
| Claude Opus 4.5 | Kimi K2 Thinking | |
|---|---|---|
Input Token Cost Cost per million input tokens | $5.00 per million tokens | $0.60 per million tokens |
Output Token Cost Cost per million output tokens | $25.00 per million tokens | $2.50 per million tokens |
Web Search Cost Additional cost for each web search operation | $0.01 per search | Not specified |
Cache Read Cost Cost to reuse cached input tokens | $0.50 per million tokens | $0.15 per million tokens |
Cache Write Cost Cost to write input tokens to the cache | $6.25 per million tokens | Not specified |
1-Hour Cache Write Cost Cost to cache input tokens for one hour | $10.00 per million tokens | Not specified |
Benchmarks
Compare relevant benchmarks between Claude Opus 4.5 and Kimi K2 Thinking.
| Claude Opus 4.5 | Kimi K2 Thinking | |
|---|---|---|
Intelligence Index Overall model quality across independent evaluations | Benchmark not available. | 17.3 (Artificial Analysis index; higher is better) |
Coding Index Programming performance across independent evaluations | Benchmark not available. | 21 (Artificial Analysis index; higher is better) |
Agentic Index Ability to complete multi-step agentic tasks | Benchmark not available. | 1.8 (Artificial Analysis index; higher is better) |
Best Design Arena Score Highest human-preference Elo score across design arenas | 1,287 Elo (#22 in Game Dev (59.4% win rate)) | 1,138 Elo (#79 in Website (48.8% win rate)) |
At a Glance
Quick overview of what makes Claude Opus 4.5 and Kimi K2 Thinking unique.
Claude Opus 4.5 by Anthropic understands both text and images, can use external tools and APIs, offers advanced reasoning, generates structured data. It can handle standard conversations with its 200K token context window. Premium pricing at $5.00/M input and $25.00/M output tokens. Includes built-in content moderation for safer outputs. Released November 24th, 2025.Kimi K2 Thinking by MoonshotAI can use external tools and APIs, offers advanced reasoning, generates structured data. It can handle standard conversations with its 262.1K token context window. Reasonably priced at $0.60/M input and $2.50/M output tokens. Released November 6th, 2025.Explore More Comparisons
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