Claude Opus 4.1 vs Kimi K2.5
How do these models stack up? Below is an expert side-by-side comparison of specifications, context window capacity, live pricing per million tokens, and standardized benchmark scores for Claude Opus 4.1 and Kimi K2.5.
Claude Opus 4.1
Claude Opus 4.1 is an updated version of Anthropic’s flagship model, offering improved performance in coding, reasoning, and agentic tasks. It achieves 74.5% on SWE-bench Verified and shows notable gains...
Kimi K2.5
Kimi K2.5 is Moonshot AI's native multimodal model, delivering state-of-the-art visual coding capability and a self-directed agent swarm paradigm. Built on Kimi K2 with continued pretraining over approximately 15T mixed...
Technical Specifications
| Specification | Claude Opus 4.1 | Kimi K2.5 |
|---|---|---|
| Provider | Anthropic | Moonshot AI |
| Context Window | 200,000 tokens | 262,144 tokens |
| Agent Suitability | N/A | N/A |
| Time to First Token (TTFT) | N/A | N/A |
| Deployment Model | managed api | managed api |
| Production Stability | stable | stable |
| API Available | Yes | Yes |
| Released Date | 2025-08-05 | 2026-01-27 |
API Pricing Comparison
Input Price per Million Tokens
Claude Opus 4.1
$15.00
Kimi K2.5
$0.38
Output Price per Million Tokens
Claude Opus 4.1
$75.00
Kimi K2.5
$2.02
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Benchmark Performance Metrics
Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.
Claude Opus 4.1 Quirks & Gotchas
No developer gotchas reported.
Kimi K2.5 Quirks & Gotchas
No developer gotchas reported.