gpt-5.6-luna 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-5.6-luna | grok-4.6 | Advantage |
|---|---|---|---|
| Capability | 51% | 58% | +8% (grok-4.6 leads) |
| Median task time | 2m 15s | 6m 45s | 4m 30s faster (gpt-5.6-luna leads) |
| Approx. task cost | $0.009 / task | $0.072 / task | $0.063 / task lower (gpt-5.6-luna leads) |
gpt-5.6-luna: 3.0% of ChatGPT Plus (3.0% / 1w) per run. grok-4.6: 15.6% of SuperGrok (15.6% / 1w) per run. Each figure is a share of that agent's own plan, so there is no delta to draw.
| Dimension | gpt-5.6-luna | grok-4.6 | Advantage |
|---|---|---|---|
| Capability | 56% | 85% | +28% (grok-4.6 leads) |
| Median task time | 2m 59s | 7m 33s | 4m 34s faster (gpt-5.6-luna leads) |
| Approx. task cost | $0.012 / task | $0.094 / task | $0.081 / task lower (gpt-5.6-luna leads) |
gpt-5.6-luna: 0.3% of ChatGPT Plus (0.3% / 1w) per good solve. grok-4.6: 1.4% of SuperGrok (1.4% / 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-5.6-luna or grok-4.6?
grok-4.6 clears higher: tier 1 of 5 versus tier 0 for gpt-5.6-luna on real-world@v3, our private suite of real-world coding problems. Latest measurement 2026-08-10.
How much do gpt-5.6-luna and grok-4.6 cost?
gpt-5.6-luna runs on ChatGPT Plus at $20/month (public price as of 2026-07-20). grok-4.6 runs on SuperGrok at $30/month (public price as of 2026-07-20).