GPT-6.1 Sol vs Grok 4.5
Grok 4.5 was superseded by Grok 4.7.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.
GPT-6.1 Sol leads overall, C to C-. GPT-6.1 Sol is about 2.2x cheaper per task. By suite, real-world issues is even at C- and GPT-6.1 Sol takes vibe coding (C+ to C-). Take Grok 4.5 anyway when you want the side that is faster on real-world issues.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-6.1 Sol
GPT-6.1 Sol leads overall, C to C-. By suite: real-world issues is even at C- (57% vs 60% capability); GPT-6.1 Sol takes vibe coding, C+ to C- (72% vs 59% capability). Only GPT-6.1 Sol has run spec planning. GPT-6.1 Sol used 6% of ChatGPT Plus's weekly limit per pass, $0.015 per task at the listed price; at the ~$100 tier the board defaults to that is an estimated ~1.2% of ChatGPT Pro 5x's weekly limit (est, about $0.015 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-6.1 Sol is about 2.2x cheaper ($0.015 vs $0.032). Grok 4.5 is faster on real-world issues: a median task takes 3m 9s against 3m 26s. Both finished every task on it. Reasons to pick Grok 4.5 anyway: it is faster on real-world issues (3m 9s vs 3m 26s median).
Changed since W32: GPT-6.1 Sol has one graded week under this version (W40); Grok 4.5: real-world issues usage 8.0% to 6.9% of the weekly limit.
| Dimension | GPT-6.1 Sol | Grok 4.5 | Advantage |
|---|---|---|---|
| Capability | 57% | 60% | +3% (Grok 4.5 leads) |
| Median task time | 3m 26s | 3m 9s | 17s faster (Grok 4.5 leads) |
| Approx. task cost | $0.012 / task | $0.032 / task | $0.019 / task lower (GPT-6.1 Sol leads) |
GPT-6.1 Sol: 4.0% of ChatGPT Plus (28.0% / 5h, 4.0% / 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-6.1 Sol has run this suite, so there is no head-to-head yet.
| Dimension | GPT-6.1 Sol | Grok 4.5 | Advantage |
|---|---|---|---|
| Capability | 72% | 59% | +13% (GPT-6.1 Sol leads) |
| Median task time | 4m 55s | 3m 40s | 1m 15s faster (Grok 4.5 leads) |
| Approx. task cost | $0.018 / task | $0.031 / task | $0.012 / task lower (GPT-6.1 Sol leads) |
GPT-6.1 Sol: 0.4% of ChatGPT Plus (2.2% / 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-6.1 Sol or Grok 4.5?
Grok 4.5 clears higher: tier 4 of 5 versus tier 2 for GPT-6.1 Sol on real-world@v3, our private suite of real-world coding problems. Latest measurement 2026-09-30.
Which is cheaper per task, GPT-6.1 Sol or Grok 4.5?
GPT-6.1 Sol used 6% of ChatGPT Plus's weekly limit per pass, $0.015 per task at the listed price; at the ~$100 tier the board defaults to that is an estimated ~1.2% of ChatGPT Pro 5x's weekly limit (est, about $0.015 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-6.1 Sol is about 2.2x cheaper ($0.015 vs $0.032).
What do GPT-6.1 Sol and Grok 4.5 cost a month?
GPT-6.1 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).