GPT-6 Astra vs Grok 4.7
Both grade C- overall. GPT-6 Astra is about 2.0x cheaper per task. By suite, real-world issues is even at D and GPT-6 Astra takes spec planning (C+ to C). Both agents run the same private suite cut headless through their own tools, each on its own subscription.Measured
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.
Verdict: Grok 4.7 vs GPT-6 Astra
Both grade C- overall. By suite: real-world issues is even at D (43% vs 47% capability); GPT-6 Astra takes spec planning, C+ to C (73% vs 68% capability); Grok 4.7 takes vibe coding, C to C- (64% vs 61% capability). GPT-6 Astra used 6% of ChatGPT Pro 5x's weekly limit per pass, $0.073 per task at the listed price. Grok 4.7 used 12% of SuperGrok Plus's weekly limit per pass, $0.145 per task at the listed price. Per task, GPT-6 Astra is about 2.0x cheaper ($0.073 vs $0.145). GPT-6 Astra is faster on real-world issues: a median task takes 2m 15s against 6m 57s. Both finished every task on it.
Changed since W38: GPT-6 Astra: vibe coding C+ to C-; Grok 4.7 has one graded week under this version (W39).
| Dimension | GPT-6 Astra | Grok 4.7 | Advantage |
|---|---|---|---|
| Capability | 43% | 47% | +3% (Grok 4.7 leads) |
| Median task time | 2m 15s | 6m 57s | 4m 42s faster (GPT-6 Astra leads) |
| Approx. task cost | $0.077 / task | $0.077 / task | Even |
GPT-6 Astra: 5.0% of ChatGPT Pro 5x (5.0% / 1w) per run. Grok 4.7: 5.0% of SuperGrok Plus (5.0% / 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 4.7 | Advantage |
|---|---|---|---|
| Capability | 73% | 68% | +4% (GPT-6 Astra leads) |
| Median task time | 2m 56s | 37m 24s | 34m 29s faster (GPT-6 Astra leads) |
| Approx. task cost | $0.057 / task | $0.402 / task | $0.345 / task lower (GPT-6 Astra leads) |
GPT-6 Astra: 1.0% of ChatGPT Pro 5x (1.0% / 1w) per run. Grok 4.7: 7.0% of SuperGrok Plus (7.0% / 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 4.7 | Advantage |
|---|---|---|---|
| Capability | 61% | 64% | +3% (Grok 4.7 leads) |
| Median task time | 2m 46s | 11m 10s | 8m 24s faster (GPT-6 Astra leads) |
| Approx. task cost | $0.046 / task | $0.092 / task | $0.046 / task lower (GPT-6 Astra leads) |
GPT-6 Astra: 0.2% of ChatGPT Pro 5x (0.2% / 1w) per good solve. Grok 4.7: 0.4% of SuperGrok Plus (0.4% / 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 4.7?
Grok 4.7 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 2026-09-20.
Which is cheaper per task, GPT-6 Astra or Grok 4.7?
GPT-6 Astra used 6% of ChatGPT Pro 5x's weekly limit per pass, $0.073 per task at the listed price. Grok 4.7 used 12% of SuperGrok Plus's weekly limit per pass, $0.145 per task at the listed price. Per task, GPT-6 Astra is about 2.0x cheaper ($0.073 vs $0.145).
What do GPT-6 Astra and Grok 4.7 cost a month?
GPT-6 Astra runs on ChatGPT Pro 5x at $100/month (public price as of 2026-09-05). Grok 4.7 runs on SuperGrok Plus at $100/month (public price as of 2026-09-14).