Model decision surface
Compare AI models
Start with Claude Opus 5 and Grok 4.6, or choose any two current ranked language models. Compare capability evidence, price, context, provider availability, and weight access without pretending one field decides every use case.
Current public data
Claude Opus 5 vs Grok 4.6
Live dataset updated 8/17/2026, 11:13:20 PM UTC
Open 1200×630 evidence receipt| Field | Claude Opus 5 Anthropic | Grok 4.6 xAI |
|---|---|---|
| ModelCap position | #2 | #10 |
| Index score | 83.1 | 74.4 |
| Evidence | Measured6 public benchmark observations across 6 boards | Measured5 public benchmark observations across 5 boards |
| Input / 1M | $5.00 | $2.00 |
| Output / 1M | $25.00 | $6.00 |
| Pricing status | fresh | fresh |
| Context | 1M | 500K |
| Providers | 5 | 1 |
| Weight access | API only | API only |
Decision facts
- Claude Opus 5 is #2; Grok 4.6 is #10 on the same current language board.
- Index scores are 83.1 for Claude Opus 5 and 74.4 for Grok 4.6.
- Both positions use Measured evidence.
- Listed output price per 1M tokens is $25.00 for Claude Opus 5 and $6.00 for Grok 4.6.
- Published context is 1,000,000 tokens for Claude Opus 5 and 500,000 for Grok 4.6.
- ModelCap currently lists 5 providers for Claude Opus 5 and 1 for Grok 4.6.
These are separate published fields, not a synthetic winner. ModelCap does not collapse price, access, context, and capability evidence into a hidden recommendation score.
Popular comparisons
- Claude Fable 5 vs Claude Opus 5#1 vs #2 on the ModelCap Index
- Claude Fable 5 vs Kimi K3#1 vs #3 on the ModelCap Index
- Claude Opus 5 vs Kimi K3#2 vs #3 on the ModelCap Index
- Claude Fable 5 vs Muse Spark 1.2#1 vs #4 on the ModelCap Index
- Claude Opus 5 vs Muse Spark 1.2#2 vs #4 on the ModelCap Index
- Muse Spark 1.2 vs Kimi K3#4 vs #3 on the ModelCap Index
- Claude Fable 5 vs Qwen3.8 Max#1 vs #5 on the ModelCap Index
- Claude Opus 5 vs Qwen3.8 Max#2 vs #5 on the ModelCap Index
- Kimi K3 vs Qwen3.8 Max#3 vs #5 on the ModelCap Index
- Muse Spark 1.2 vs Qwen3.8 Max#4 vs #5 on the ModelCap Index
- Claude Fable 5 vs GPT-5.6 Sol#1 vs #6 on the ModelCap Index
- Claude Opus 5 vs GPT-5.6 Sol#2 vs #6 on the ModelCap Index
- Kimi K3 vs GPT-5.6 Sol#3 vs #6 on the ModelCap Index
- Muse Spark 1.2 vs GPT-5.6 Sol#4 vs #6 on the ModelCap Index
- GPT-5.6 Sol vs Qwen3.8 Max#6 vs #5 on the ModelCap Index
- Claude Fable 5 vs Gemini 3.1 Pro Preview#1 vs #7 on the ModelCap Index
- Claude Opus 5 vs Gemini 3.1 Pro Preview#2 vs #7 on the ModelCap Index
- Gemini 3.1 Pro Preview vs Kimi K3#7 vs #3 on the ModelCap Index
- Gemini 3.1 Pro Preview vs Muse Spark 1.2#7 vs #4 on the ModelCap Index
- Gemini 3.1 Pro Preview vs Qwen3.8 Max#7 vs #5 on the ModelCap Index
- Gemini 3.1 Pro Preview vs GPT-5.6 Sol#7 vs #6 on the ModelCap Index
- Claude Fable 5 vs GPT-5.5#1 vs #8 on the ModelCap Index
- Claude Opus 5 vs GPT-5.5#2 vs #8 on the ModelCap Index
- Kimi K3 vs GPT-5.5#3 vs #8 on the ModelCap Index
Each comparison page is a permanent, shareable URL with the same live figures as this tool: ModelCap Index position, API pricing, context window, provider count, weight access and every shared benchmark board.