gpt-5.6-sol vs grok-4.5
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-sol | grok-4.5 | Advantage |
|---|---|---|---|
| Capability | 60% | 60% | Even |
| Median task time | 2m 28s | 3m 9s | 41s faster (gpt-5.6-sol leads) |
| Approx. task cost | $0.011 / task | $0.032 / task | $0.021 / task lower (gpt-5.6-sol leads) |
gpt-5.6-sol: 3.5% of ChatGPT Plus (3.5% / 1w) per run. grok-4.5: 6.9% of SuperGrok (6.9% / 1w) per run. Each figure is a share of that agent's own plan, so there is no delta to draw.
Only gpt-5.6-sol has run this suite, so there is no head-to-head yet.
| Dimension | gpt-5.6-sol | grok-4.5 | Advantage |
|---|---|---|---|
| Capability | 56% | 59% | +3% (grok-4.5 leads) |
| Median task time | 3m 43s | 3m 40s | 4s faster (grok-4.5 leads) |
| Approx. task cost | $0.011 / task | $0.031 / task | $0.019 / task lower (gpt-5.6-sol leads) |
gpt-5.6-sol: 0.2% of ChatGPT Plus (0.2% / 1w) per good solve. grok-4.5: 0.4% of SuperGrok (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-5.6-sol or grok-4.5?
They are even on our ladder: both clear tier 4 of 5 at 60% capability on real-world@v3, our private suite of real-world coding problems. Latest measurement 2026-08-17.
How much do gpt-5.6-sol and grok-4.5 cost?
gpt-5.6-sol runs on ChatGPT Plus at $20/month (public price as of 2026-07-20). grok-4.5 runs on SuperGrok at $30/month (public price as of 2026-07-20).