Claude Opus 4.7 vs Hy4 Preview: Benchmark Comparison
Claude Opus 4.7 has the higher score on 4 of 11 shared benchmarks; Hy4 Preview leads on 6.
The largest observed score gap is 11.61 pts on MedCode , where Claude Opus 4.7 leads.
Reported ±1 standard-error ranges overlap on 8 of 11 shared benchmarks with comparable uncertainty data. This is not a pairwise statistical significance test.
Shared benchmark results
Scores and reported standard errors come from the latest visible Vals benchmark version available for both models.
| Benchmark | Claude Opus 4.7 | Hy4 Preview | Gap | Reported uncertainty |
|---|---|---|---|---|
| Harvey's Legal Agent Benchmark | 6.67% ±2.00 | 9.17% ±2.00 | 2.50 pts | Reported ±1 SE ranges overlap |
| Legal Research Bench | 38.46% ±3.38 | 45.19% ±3.46 | 6.73 pts | Reported ±1 SE ranges overlap |
| LegalBench | 85.25% ±0.45 | 83.76% ±0.41 | 1.49 pts | Reported ±1 SE ranges do not overlap |
| EMB | 63.73% ±3.11 | 58.08% ±3.14 | 5.65 pts | Reported ±1 SE ranges overlap |
| Finance Agent (v2) | 51.51% ±0.49 | 55.06% ±0.31 | 3.55 pts | Reported ±1 SE ranges do not overlap |
| Tax Agent Bench | 63.86% ±3.14 | 63.71% ±3.26 | 0.15 pts | Reported ±1 SE ranges overlap |
| MedCode | 54.86% ±2.21 | 43.25% ±2.13 | 11.61 pts | Reported ±1 SE ranges do not overlap |
| MedScribe | 82.95% ±1.98 | 83.60% ±2.06 | 0.65 pts | Reported ±1 SE ranges overlap |
| Code Migration | 43.88% ±4.22 | 47.43% ±4.27 | 3.56 pts | Reported ±1 SE ranges overlap |
| ProgramBench | 0.00% ±0.00 | 0.00% ±0.00 | 0.00 pts | Reported ±1 SE ranges overlap |
| Vibe Code Bench v1.1 | 71.00% ±4.51 | 77.48% ±4.04 | 6.47 pts | Reported ±1 SE ranges overlap |
Performance by category
| Category | Claude Opus 4.7 average | Hy4 Preview average |
|---|---|---|
| Legal | 43.46% | 46.04% |
| Finance | 59.70% | 58.95% |
| Healthcare | 68.91% | 63.42% |
| Coding | 38.29% | 41.64% |
Cost and latency
Cost per test appears only where the benchmark reports it for both models. Latency is the measured completion time for that benchmark.
| Benchmark | Claude Opus 4.7 cost | Hy4 Preview cost | Claude Opus 4.7 latency | Hy4 Preview latency |
|---|---|---|---|---|
| Harvey's Legal Agent Benchmark | $10.81 | $0.98 | 24m44s | 29m25s |
| Legal Research Bench | $3.06 | $0.85 | 8m32s | 1h04m |
| LegalBench | N/A | N/A | 26.62s | 90.56s |
| EMB | $12.76 | $0.79 | 38m36s | 30m39s |
| Finance Agent (v2) | $4.03 | $0.59 | 6m00s | 23m45s |
| Tax Agent Bench | $1.27 | $0.59 | 4m39s | 41m04s |
| MedCode | N/A | N/A | 54.25s | 6m39s |
| MedScribe | N/A | N/A | 67.50s | 5m50s |
| Code Migration | $36.39 | $3.41 | 1h12m | 2h13m |
| ProgramBench | N/A | N/A | 54m07s | 2h10m |
| Vibe Code Bench v1.1 | $21.41 | $2.18 | 35m42s | 41m33s |
Results available only for Claude Opus 4.7
- Vals RSI Index
- MortgageTax
- TaxEval v2
- GPQA Diamond
- MMLU Pro
- MMMU Pro
- SAGE
- LiveCodeBench
- SWE-bench
Results available only for Hy4 Preview
- Vals Index
- ProofBench v1.1
- BioMysteryBench
- Terminal-Bench Science
- IOI
- Terminal-Bench 4.0
- CyberBench v1.1
- SRE Bench
- Public Benefits Bench v1.1