Claude Opus 4.5 vs Kimi K2 0905: Specs & Benchmark Comparison
| Characteristic | Claude Opus 4.5 | Kimi K2 0905 |
|---|---|---|
| Company | Anthropic | Moonshot AI |
| Release Date | November 23, 2025 | September 5, 2025 |
| Parameters | — | 1.0T |
| Multimodal | Yes | No |
| Context (input) | 200K | 262K |
| Context (output) | 64K | 262K |
| Input Price / 1M | $5.00 | $0.60 |
| Output Price / 1M | $25.00 | $2.50 |
| Average Score | 0.9 | 0.8 |
| Benchmarks | ||
| GPQA | 0.9 | 0.8 |
Visual Benchmark Comparison
Claude Opus 4.5
Kimi K2 0905
GPQA0.9 vs 0.8
0.9
0.8
Verdict
Kimi K2 0905 leads in 2 out of 4 comparison categories.
Overall Performance
Both models show comparable average scores: Claude Opus 4.5 — 0.9, Kimi K2 0905 — 0.8.
API Cost
Kimi K2 0905 is 9.7x cheaper: input $0.60/1M vs $5.00/1M tokens.
Context Window
Kimi K2 0905 supports a larger context: 262K vs 200K tokens.
Recency
Claude Opus 4.5 is newer: released 11/23/2025 vs 9/5/2025.
More About These Models
Related Comparisons
Frequently Asked Questions
Which is better for coding — Claude Opus 4.5 or Kimi K2 0905?
Direct comparison on the SWE-Bench benchmark is not available. We recommend reviewing other metrics on the comparison page.
Which model is cheaper — Claude Opus 4.5 or Kimi K2 0905?
Kimi K2 0905 is cheaper for input: $0.60 per 1M tokens vs $5.00.
Which has a larger context window — Claude Opus 4.5 or Kimi K2 0905?
Kimi K2 0905 supports a larger context: 262,144 tokens vs 200,000.
The Claude Opus 4.5 and Kimi K2 0905 comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Claude Opus 4.5 or Kimi K2 0905 page. See also the complete list of AI model comparisons.