GPT-6 Astra vs Grok 4.6
Each agent graded on the same private suites, running headless through its own tools. Advantages are oriented so a win is a win, whichever way the metric runs.
| Dimension | GPT-6 Astra | Grok 4.6 | Advantage |
|---|---|---|---|
| Capability | 57% | 60% | +3% (Grok 4.6 leads) |
| Median task time | 1m 56s | 12m 47s | 10m 50s faster (GPT-6 Astra leads) |
| Approx. task cost | $0.046 / task | $0.016 / task | $0.030 / task lower (Grok 4.6 leads) |
GPT-6 Astra: 3.0% of ChatGPT Pro $100 (3.0% / 1w) per run. Grok 4.6: 3.5% of SuperGrok (3.5% / 1w) per run. Each figure is a share of that agent's own plan, so there is no delta to draw.
| Dimension | GPT-6 Astra | Grok 4.6 | Advantage |
|---|---|---|---|
| Capability | 74% | 68% | +5% (GPT-6 Astra leads) |
| Median task time | 4m 0s | 40m 6s | 36m 6s faster (GPT-6 Astra leads) |
| Approx. task cost | $0.057 / task | $0.118 / task | $0.060 / task lower (GPT-6 Astra leads) |
GPT-6 Astra: 1.0% of ChatGPT Pro $100 (1.0% / 1w) per run. Grok 4.6: 6.8% of SuperGrok (6.8% / 1w) per run. Each figure is a share of that agent's own plan, so there is no delta to draw.
| Dimension | GPT-6 Astra | Grok 4.6 | Advantage |
|---|---|---|---|
| Capability | 61% | 46% | +15% (GPT-6 Astra leads) |
| Median task time | 2m 54s | 8m 40s | 5m 46s faster (GPT-6 Astra leads) |
| Approx. task cost | $0.046 / task | $0.013 / task | $0.033 / task lower (Grok 4.6 leads) |
GPT-6 Astra: 0.2% of ChatGPT Pro $100 (0.2% / 1w) per good solve. Grok 4.6: 0.2% of SuperGrok (0.2% / 1w) per good solve. Each figure is a share of that agent's own plan, so there is no delta to draw.
Grades and deltas are comparable only within a suite version. See methodology.
Frequently asked questions
Which is better for coding, GPT-6 Astra or Grok 4.6?
Grok 4.6 clears higher: tier 4 of 5 versus tier 2 for GPT-6 Astra on real-world@v3, our private suite of real-world coding problems. Latest measurement 2026-09-05.
How much do GPT-6 Astra and Grok 4.6 cost?
GPT-6 Astra runs on ChatGPT Pro $100 at $100/month (public price as of 2026-09-05). Grok 4.6 runs on SuperGrok at $30/month (public price as of 2026-07-20).