Claude Sonnet 5.5 vs Grok 4.7
Grok 4.7 leads overall, C to C-. Claude Sonnet 5.5 is about 63x cheaper per task. By suite, real-world issues is even at C- and spec planning is even at C+. Take Claude Sonnet 5.5 anyway when you want the side that is cheaper per task and 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 4.7 vs Claude Sonnet 5.5
Grok 4.7 leads overall, C to C-. By suite: real-world issues is even at C- (60% vs 58% capability); spec planning is even at C+ (74% vs 73% capability); Grok 4.7 takes vibe coding, C to D+ (64% vs 48% capability). Claude Sonnet 5.5 used <1% of Claude Max 5x's weekly limit per pass, $0.003 per task at the listed price. Grok 4.7 used 15% of SuperGrok Plus's weekly limit per pass, $0.182 per task at the listed price. Per task, Claude Sonnet 5.5 is about 63x cheaper ($0.003 vs $0.182). Claude Sonnet 5.5 is faster on real-world issues: a median task takes 37s against 8m 13s. Both finished every task on it. Reasons to pick Claude Sonnet 5.5 anyway: it is cheaper per task ($0.003 vs $0.182) and it is faster on real-world issues (37s vs 8m 13s median).
Changed since W39: Grok 4.7: real-world issues D to C-, spec planning C to C+, spec planning usage 7% to 10% of the weekly limit, vibe coding usage 0.4% to 0.6% of the weekly limit.
| Dimension | Claude Sonnet 5.5 | Grok 4.7 | Advantage |
|---|---|---|---|
| Capability | 60% | 58% | +2% (Claude Sonnet 5.5 leads) |
| Median task time | 37s | 8m 13s | 7m 36s faster (Claude Sonnet 5.5 leads) |
| Approx. task cost | $0.002 / task | $0.077 / task | $0.075 / task lower (Claude Sonnet 5.5 leads) |
Claude Sonnet 5.5: 4.0% of Claude Max 5x (4.0% / 5h) per run. Its weekly limit holds about 13.8 of the week's 33.6 5h windows. Grok 4.7: 5.0% of SuperGrok Plus (5.0% / 1w) per run. Each figure is a share of that agent's own plan, so there is no delta to draw.
| Dimension | Claude Sonnet 5.5 | Grok 4.7 | Advantage |
|---|---|---|---|
| Capability | 74% | 73% | +1% (Claude Sonnet 5.5 leads) |
| Median task time | 3m 25s | 39m 33s | 36m 9s faster (Claude Sonnet 5.5 leads) |
| Approx. task cost | $0.007 / task | $0.575 / task | $0.568 / task lower (Claude Sonnet 5.5 leads) |
Claude Sonnet 5.5: 4.0% of Claude Max 5x (4.0% / 5h) per run. Its weekly limit holds about 13.8 of the week's 33.6 5h windows. Grok 4.7: 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 Sonnet 5.5 | Grok 4.7 | Advantage |
|---|---|---|---|
| Capability | 48% | 64% | +15% (Grok 4.7 leads) |
| Median task time | 56s | 12m 13s | 11m 16s faster (Claude Sonnet 5.5 leads) |
| Approx. task cost | $0.001 / task | $0.138 / task | $0.137 / task lower (Claude Sonnet 5.5 leads) |
Claude Sonnet 5.5: 0.2% of Claude Max 5x (0.2% / 5h) per good solve. Its weekly limit holds about 13.8 of the week's 33.6 5h windows. Grok 4.7: 0.6% of SuperGrok Plus (0.6% / 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, Claude Sonnet 5.5 or Grok 4.7?
Claude Sonnet 5.5 clears higher: tier 4 of 5 versus tier 1 for Grok 4.7 on real-world@v3, our private suite of real-world coding problems. Latest measurement 2026-09-28.
Which is cheaper per task, Claude Sonnet 5.5 or Grok 4.7?
Claude Sonnet 5.5 used <1% of Claude Max 5x's weekly limit per pass, $0.003 per task at the listed price. Grok 4.7 used 15% of SuperGrok Plus's weekly limit per pass, $0.182 per task at the listed price. Per task, Claude Sonnet 5.5 is about 63x cheaper ($0.003 vs $0.182).
What do Claude Sonnet 5.5 and Grok 4.7 cost a month?
Claude Sonnet 5.5 runs on Claude Max 5x at $100/month (public price as of 2026-07-20). Grok 4.7 runs on SuperGrok Plus at $100/month (public price as of 2026-09-14).