Model comparison
Claude Opus 4.7 vs GPT-5.5 Pro
Head-to-head evidence from 3 shared benchmark results across 2 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Claude Opus 4.7 #12 (Supported); GPT-5.5 Pro #38 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude Opus 4.7 and GPT-5.5 Pro share 3 comparable benchmark results. 1 of 8 categories are comparable. 18 results are unique to Claude Opus 4.7; 4 to GPT-5.5 Pro.
Updated July 22, 2026- Shared results
- 3
- Claude Opus 4.7 only
- 18
- GPT-5.5 Pro only
- 4
- Comparable categories
- 1 / 8
Pick Claude Opus 4.7 if you want the stronger benchmark profile. GPT-5.5 Pro only becomes the better choice if mathematics is the priority or you want the stronger reasoning-first profile.
Confidence note. This is a partial-evidence comparison with 3 shared benchmark results across 2 evidence categories; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Claude Opus 4.7 is clearly ahead on the BenchAlign aggregate, 71.94 to 63.69. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.5 Pro is also the more expensive model on tokens at $30.00 input / $180.00 output per 1M tokens, versus $5.00 input / $25.00 output per 1M tokens for Claude Opus 4.7. That is roughly 7.2x on output cost alone. GPT-5.5 Pro is the reasoning model in the pair, while Claude Opus 4.7 is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | Claude Opus 4.7 | Δ | GPT-5.5 Pro |
|---|---|---|---|
| Math | Claude Opus 4.738.6 | Margin→ 9.5 | GPT-5.5 Pro48.1 |
| Agentic | Claude Opus 4.7Not measured | MarginNo overlap | GPT-5.5 Pro90.1 |
| Knowledge | Claude Opus 4.7Not measured | MarginNo overlap | GPT-5.5 Pro57.2 |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
FrontierMath v2 (Tier 4)
MathA 22.917%B 39.600%Winner: GPT-5.5 ProΔ 16.7FrontierMath v2 (Tier 4): Claude Opus 4.7 scored 22.917%; GPT-5.5 Pro scored 39.600%. GPT-5.5 Pro wins this benchmark. - Source ↗
FrontierMath v2 (Tiers 1-3)
MathA 43.793%B 51.000%Winner: GPT-5.5 ProΔ 7.2FrontierMath v2 (Tiers 1-3): Claude Opus 4.7 scored 43.793%; GPT-5.5 Pro scored 51.000%. GPT-5.5 Pro wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude Opus 4.7 | GPT-5.5 Pro | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude Opus 4.7$5 input / $25 output | GPT-5.5 Pro$30 input / $180 output | Claude Opus 4.7 has the lower combined listed price. |
| Generation speedtokens per second | Claude Opus 4.7Not available | GPT-5.5 ProNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude Opus 4.7Not available | GPT-5.5 ProNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude Opus 4.71M | GPT-5.5 Pro1M | Listed context windows are equal. |
Benchmark Deep Dive
Agentic5 benchmarks
Coding4 benchmarks
Reasoning2 benchmarks
Knowledge8 benchmarks
| Benchmark | Claude Opus 4.7 | GPT-5.5 Pro | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 42.7% | — | Not comparable |
| AA-GPQA DiamondSource | 88.5% | — | Not comparable |
| AA-HLESource | 31.2% | — | Not comparable |
| AA-Omniscience IndexSource | 14.2% | — | Not comparable |
| AA-Omniscience AccuracySource | 43.5% | — | Not comparable |
| AA-Omniscience Hallucination RateSource | 51.9% | — | Not comparable |
| HLESource | — | 57.2% | Not comparable |
| HLE w/o toolsSource | — | 43.1% | Not comparable |
MathGPT-5.5 Pro wins3 benchmarks
Multimodal2 benchmarks
Inst. Following1 benchmarks
| Benchmark | Claude Opus 4.7 | GPT-5.5 Pro | Result |
|---|---|---|---|
| AA-IFBenchSource | 43.6% | — | Not comparable |
Frequently Asked Questions (2)
Which is better, Claude Opus 4.7 or GPT-5.5 Pro?
Claude Opus 4.7 is ahead on BenchLM's BenchAlign leaderboard, 71.94 to 63.69. The biggest single separator in this matchup is FrontierMath v2 (Tier 4), where the scores are 22.917% and 39.600%.
Which is better for math, Claude Opus 4.7 or GPT-5.5 Pro?
GPT-5.5 Pro has the edge for math in this comparison, averaging 48.1 versus 38.6. Inside this category, FrontierMath v2 (Tier 4) is the benchmark that creates the most daylight between them.
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