Claude Opus 5 vs Grok 4.6
Claude Opus 5 was superseded by Claude Opus 5.5. Grok 4.6 was superseded by Grok 4.7.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.
Claude Opus 5 leads overall, C to C-. Claude Opus 5 is about 6.5x cheaper per task. By suite, Claude Opus 5 takes real-world issues (C- to D) and spec planning is even at C. The data gives no reason to pick Grok 4.6 over Claude Opus 5 this week.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 4.6 vs Claude Opus 5
Claude Opus 5 leads overall, C to C-. By suite: Claude Opus 5 takes real-world issues, C- to D (57% vs 47% capability); spec planning is even at C (66% vs 66% capability); Claude Opus 5 takes vibe coding, C+ to C- (72% vs 61% capability). Claude Opus 5 used 2% of Claude Max 5x's weekly limit per pass, $0.024 per task at the listed price. Grok 4.6 used 13% of SuperGrok Plus's weekly limit per pass, $0.157 per task at the listed price. Per task, Claude Opus 5 is about 6.5x cheaper ($0.024 vs $0.157). Claude Opus 5 is faster on real-world issues: a median task takes 1m 56s against 7m 10s. Both finished every task on it. The data gives no reason to pick Grok 4.6 over Claude Opus 5 this week.
Changed since the previous graded week: Claude Opus 5: real-world issues usage 3% to 1% of the weekly limit; Grok 4.6: real-world issues C- to D, real-world issues usage 4% to 3% of the weekly limit, vibe coding C+ to C-.
| Dimension | Claude Opus 5 | Grok 4.6 | Advantage |
|---|---|---|---|
| Capability | 57% | 47% | +10% (Claude Opus 5 leads) |
| Median task time | 1m 56s | 7m 10s | 5m 15s faster (Claude Opus 5 leads) |
| Approx. task cost | $0.015 / task | $0.046 / task | $0.031 / task lower (Claude Opus 5 leads) |
Claude Opus 5: 21.0% of Claude Max 5x (21.0% / 5h, 1.0% / 1w) per run. Its weekly limit holds about 13.8 of the week's 33.6 5h windows. Grok 4.6: 3.0% of SuperGrok Plus (3.0% / 1w) per run. Each figure is a share of that agent's own plan, so there is no delta to draw.
| Dimension | Claude Opus 5 | Grok 4.6 | Advantage |
|---|---|---|---|
| Capability | 66% | 66% | +0% (Claude Opus 5 leads) |
| Median task time | 2m 9s | 45m 26s | 43m 17s faster (Claude Opus 5 leads) |
| Approx. task cost | $0.057 / task | $0.575 / task | $0.517 / task lower (Claude Opus 5 leads) |
Claude Opus 5: 6.0% of Claude Max 5x (6.0% / 5h, 1.0% / 1w) per run. Its weekly limit holds about 13.8 of the week's 33.6 5h windows. Grok 4.6: 10.0% of SuperGrok Plus (10.0% / 1w) per run. Each figure is a share of that agent's own plan, so there is no delta to draw.
| Dimension | Claude Opus 5 | Grok 4.6 | Advantage |
|---|---|---|---|
| Capability | 72% | 61% | +10% (Claude Opus 5 leads) |
| Median task time | 2m 51s | 11m 14s | 8m 22s faster (Claude Opus 5 leads) |
| Approx. task cost | $0.011 / task | <$0.230 / task | $0.219 / task lower (Claude Opus 5 leads) |
Claude Opus 5: 1.6% of Claude Max 5x (1.6% / 5h) per good solve. Its weekly limit holds about 13.8 of the week's 33.6 5h windows. Grok 4.6: under 1% of SuperGrok Plus 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, Claude Opus 5 or Grok 4.6?
Grok 4.6 clears higher: tier 4 of 5 versus tier 2 for Claude Opus 5 on real-world@v3, our private suite of real-world coding problems. Latest measurement 2026-09-21.
Which is cheaper per task, Claude Opus 5 or Grok 4.6?
Claude Opus 5 used 2% of Claude Max 5x's weekly limit per pass, $0.024 per task at the listed price. Grok 4.6 used 13% of SuperGrok Plus's weekly limit per pass, $0.157 per task at the listed price. Per task, Claude Opus 5 is about 6.5x cheaper ($0.024 vs $0.157).
What do Claude Opus 5 and Grok 4.6 cost a month?
Claude Opus 5 runs on Claude Max 5x at $100/month (public price as of 2026-07-27). Grok 4.6 runs on SuperGrok Plus at $100/month (public price as of 2026-09-14).