LLM Comparison
Claude Opus 5 vs Kimi K3
Side-by-side specs, pricing & capabilities · Updated August 2026
Price vs Intelligence
Add to comparison
2/6 models| Organization | ||
| OpenTools Score | 97 6.4 | 73 8.1 |
| Family | Claude Opus | Kimi |
| Status | Current | Current |
| Release Date | Jul 2026 | — |
| Context Window | 1.0M tokens | 1.0M tokens |
| Input Price | $5.00/M tokens | $3.00/M tokens |
| Output Price | $25.00/M tokens | $15.00/M tokens |
| Pricing Notes | Claude Opus 5 is priced at $5 per million input tokens and $25 per million output tokens; fast mode is priced separately at Fable-level rates. | Official Kimi pricing lists kimi-k3 at $3.00 per 1M cache-miss input tokens, $0.30 per 1M cache-hit input tokens, and $15.00 per 1M output tokens. Official troubleshooting docs say max_completion_tokens defaults to 131,072 and maximum output length is 1024*1024 minus prompt tokens. |
| Capabilities | textvisionreasoningcodingtool-useagentslong-context | textvisionreasoningcodingtool-usestructured-outputjson-modelong-contextagentic |
| Max Output | 128K tokens | 131K tokens |
| API Identifier | claude-opus-5 | kimi-k3 |
| Benchmarks | ||
| Artificial Analysis Intelligence Index | 61artificial-analysis | 57artificial-analysis |
| AA-Briefcase | — | 1543artificial-analysis |
| AA-Briefcase Rubric Pass Rate | — | 51artificial-analysis |
| View Claude Opus 5 | View Kimi K3 | |
Cost Calculator
Enter your expected monthly token usage to compare costs.
| Model | Input | Output | Total / mo | vs Best |
|---|---|---|---|---|
| Kimi K3Cheapest | $3.00 | $7.50 | $10.50 | — |
| Claude Opus 5 | $5.00 | $12.50 | $17.50 | +67% |
Anthropic
Claude Opus 5
Claude Opus 5 is Anthropic's Opus-class model for complex agentic coding and enterprise work. Official Claude docs list the claude-opus-5 API ID, 1M token context window, 128k max output, adaptive thinking, and $5 input / $25 output pricing per million tokens.
Moonshot AI
Kimi K3
Kimi K3 is Moonshot AI open-weight 2.8T-parameter flagship model for long-horizon coding, end-to-end knowledge work, reasoning, and native multimodal understanding. Official Kimi documentation lists the API model ID kimi-k3, a 1M-token context window, automatic context caching, tool calls, JSON mode, structured outputs, and always-on reasoning effort controls.
More Comparisons
Looking for more AI models?
Browse All LLMs