Claude Opus 4.8 vs Kimi K2 Thinking
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 4.8 and Kimi K2 Thinking.
Claude Opus 4.8
Claude Opus 4.8 is Anthropic's most capable generally available model in the Opus family. It supports text, image, and file inputs with text output, with reasoning support and a 1M-token...
Kimi K2 Thinking
Kimi K2 Thinking is Moonshot AI’s most advanced open reasoning model to date, extending the K2 series into agentic, long-horizon reasoning. Built on the trillion-parameter Mixture-of-Experts (MoE) architecture introduced in...
Technical Specifications
| Specification | Claude Opus 4.8 | Kimi K2 Thinking |
|---|---|---|
| Provider | Anthropic | Moonshot AI |
| Context Window | 1,000,000 tokens | 262,144 tokens |
| Agent Suitability | 97/100 | N/A |
| Time to First Token (TTFT) | 520 ms | N/A |
| Deployment Model | managed api | managed api |
| Production Stability | beta | stable |
| API Available | Yes | Yes |
| Released Date | 2026-05-27 | 2025-11-06 |
API Pricing Comparison
Input Price per Million Tokens
Claude Opus 4.8
$5.00
Kimi K2 Thinking
$0.60
Output Price per Million Tokens
Claude Opus 4.8
$25.00
Kimi K2 Thinking
$2.50
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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 4.8 Quirks & Gotchas
- ▸Best-in-class for autonomous code repair and multi-agent orchestration
- ▸Preview model — API may introduce breaking changes without notice
Kimi K2 Thinking Quirks & Gotchas
No developer gotchas reported.