Model decision surface
Compare AI models
Start with GPT-6 Astra and Grok 4.20 Multi-Agent, 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
GPT-6 Astra vs Grok 4.20 Multi-Agent
Live dataset updated 9/9/2026, 8:46:14 PM UTC
Open 1200×630 evidence receipt| Field | GPT-6 Astra OpenAI | |
|---|---|---|
| ModelCap position | #1 | #14 |
| Index score | 93.7 | 77.5 |
| Evidence | Measured4 public benchmark observations across 4 boards | Measured2 public benchmark observations across 2 boards |
| Input / 1M | $10.00 | $1.25 |
| Output / 1M | $50.00 | $2.50 |
| Pricing status | fresh | fresh |
| Context | 1M | 2M |
| Providers | 2 | 1 |
| Weight access | API only | API only |
Decision facts
- GPT-6 Astra is #1; Grok 4.20 Multi-Agent is #14 on the same current language board.
- Index scores are 93.7 for GPT-6 Astra and 77.5 for Grok 4.20 Multi-Agent. Their published uncertainty intervals overlap, so the rank difference alone does not establish a reliable capability advantage for your workload.
- Both positions use Measured evidence.
- Listed output price per 1M tokens is $50.00 for GPT-6 Astra and $2.50 for Grok 4.20 Multi-Agent. For 1,000 requests with 2,000 input and 500 output tokens each (2M input + 0.5M output), the listed-rate estimate is $45.00 for GPT-6 Astra versus $3.75 for Grok 4.20 Multi-Agent. Grok 4.20 Multi-Agent costs 91.7% less in this scenario. This excludes caching, batch discounts, prompt-length tiers, tool charges and retries; verify the selected endpoint before budgeting.
- Published context is 1,050,000 tokens for GPT-6 Astra and 2,000,000 for Grok 4.20 Multi-Agent.
- ModelCap currently lists 2 providers for GPT-6 Astra and 1 for Grok 4.20 Multi-Agent.
These are separate published fields, not a synthetic winner. ModelCap does not collapse price, access, context, and capability evidence into a hidden recommendation score.
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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.