GPT-6 Sol vs Grok 4.5
GPT-6 Sol was superseded by GPT-6.1 Sol. Grok 4.5 was superseded by Grok 4.7. The grades below are the last ones measured, so read them as history rather than as this week's board. See the current roster.
Both grade C- overall. GPT-6 Sol is about 1.9x cheaper per task. By suite, real-world issues is even at C- and vibe coding is even at 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 4.5 vs GPT-6 Sol
Both grade C- overall. By suite: real-world issues is even at C- (55% vs 60% capability); vibe coding is even at C- (61% vs 59% capability). Only GPT-6 Sol has run spec planning. GPT-6 Sol used 7% of ChatGPT Plus's weekly limit per pass, $0.017 per task at the listed price; at the ~$100 tier the board defaults to that is an estimated ~1.4% of ChatGPT Pro 5x's weekly limit (est, about $0.017 per task). Grok 4.5 used 6.9% of SuperGrok's weekly limit per pass, $0.032 per task at the listed price. Per task, GPT-6 Sol is about 1.9x cheaper ($0.017 vs $0.032). GPT-6 Sol is faster on real-world issues: a median task takes 1m 41s against 3m 9s. Both finished every task on it.
Changed since the previous graded week: GPT-6 Sol: real-world issues D- to C-, real-world issues usage 4% to 5% of the weekly limit, spec planning C to C-, spec planning usage 1% to 2% of the weekly limit, vibe coding D+ to C-; Grok 4.5: real-world issues usage 8.0% to 6.9% of the weekly limit.
| Dimension | GPT-6 Sol | Grok 4.5 | Advantage |
|---|---|---|---|
| Capability | 55% | 60% | +5% (Grok 4.5 leads) |
| Median task time | 1m 41s | 3m 9s | 1m 28s faster (GPT-6 Sol leads) |
| Approx. task cost | $0.015 / task | $0.032 / task | $0.016 / task lower (GPT-6 Sol leads) |
GPT-6 Sol: 5.0% of ChatGPT Plus (35.0% / 5h, 5.0% / 1w) per run. Its weekly limit holds about 6 of the week's 33.6 5h windows. 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-6 Sol has run this suite, so there is no head-to-head yet.
| Dimension | GPT-6 Sol | Grok 4.5 | Advantage |
|---|---|---|---|
| Capability | 61% | 59% | +3% (GPT-6 Sol leads) |
| Median task time | 2m 44s | 3m 40s | 56s faster (GPT-6 Sol leads) |
| Approx. task cost | $0.018 / task | $0.031 / task | $0.012 / task lower (GPT-6 Sol leads) |
GPT-6 Sol: 0.4% of ChatGPT Plus (1.8% / 5h, 0.4% / 1w) per good solve. Its weekly limit holds about 6 of the week's 33.6 5h windows. 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-6 Sol or Grok 4.5?
Grok 4.5 clears higher: tier 4 of 5 versus tier 1 for GPT-6 Sol on real-world@v3, our private suite of real-world coding problems. Latest measurement 2026-09-27.
Which is cheaper per task, GPT-6 Sol or Grok 4.5?
GPT-6 Sol used 7% of ChatGPT Plus's weekly limit per pass, $0.017 per task at the listed price; at the ~$100 tier the board defaults to that is an estimated ~1.4% of ChatGPT Pro 5x's weekly limit (est, about $0.017 per task). Grok 4.5 used 6.9% of SuperGrok's weekly limit per pass, $0.032 per task at the listed price. Per task, GPT-6 Sol is about 1.9x cheaper ($0.017 vs $0.032).
What do GPT-6 Sol and Grok 4.5 cost a month?
GPT-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).