Model comparison
GPT-5.5 vs Qwen3.5 Plus
Head-to-head evidence from 4 shared benchmark results across 3 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: GPT-5.5 #9 (Estimated); Qwen3.5 Plus #138 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. GPT-5.5 and Qwen3.5 Plus share 4 comparable benchmark results. 1 of 8 categories are comparable. 53 results are unique to GPT-5.5; 0 to Qwen3.5 Plus.
Updated July 22, 2026- Shared results
- 4
- GPT-5.5 only
- 53
- Qwen3.5 Plus only
- 0
- Comparable categories
- 1 / 8
Pick GPT-5.5 if you want the stronger benchmark profile. Qwen3.5 Plus only becomes the better choice if you want the cheaper token bill.
Confidence note. This is a partial-evidence comparison with 4 shared benchmark results across 3 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
GPT-5.5 is clearly ahead on the BenchAlign aggregate, 73.51 to 47.2. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.5's sharpest advantage is in mathematics, where it averages 47.6 against 16.3. The single biggest benchmark swing on the page is FrontierMath v2 (Tier 4), 35.400% to 2.083%.
GPT-5.5 is also the more expensive model on tokens at $5.00 input / $30.00 output per 1M tokens, versus $0.40 input / $2.40 output per 1M tokens for Qwen3.5 Plus. That is roughly 12.5x on output cost alone.
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 | GPT-5.5 | Δ | Qwen3.5 Plus |
|---|---|---|---|
| Math | GPT-5.547.6 | Margin← 31.3 | Qwen3.5 Plus16.3 |
| Agentic | GPT-5.581.6 | MarginNo overlap | Qwen3.5 PlusNot measured |
| Coding | GPT-5.558.6 | MarginNo overlap | Qwen3.5 PlusNot measured |
| Reasoning | GPT-5.585.0 | MarginNo overlap | Qwen3.5 PlusNot measured |
| Knowledge | GPT-5.557.8 | MarginNo overlap | Qwen3.5 PlusNot measured |
| Multimodal | GPT-5.570.4 | MarginNo overlap | Qwen3.5 PlusNot measured |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
FrontierMath v2 (Tier 4)
MathA 35.400%B 2.083%Winner: GPT-5.5Δ 33.3FrontierMath v2 (Tier 4): GPT-5.5 scored 35.400%; Qwen3.5 Plus scored 2.083%. GPT-5.5 wins this benchmark. - Source ↗
FrontierMath v2 (Tiers 1-3)
MathA 51.700%B 21.034%Winner: GPT-5.5Δ 30.7FrontierMath v2 (Tiers 1-3): GPT-5.5 scored 51.700%; Qwen3.5 Plus scored 21.034%. GPT-5.5 wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | GPT-5.5 | Qwen3.5 Plus | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | GPT-5.5$5 input / $30 output | Qwen3.5 Plus$0.4 input / $2.4 output | Qwen3.5 Plus has the lower combined listed price. |
| Generation speedtokens per second | GPT-5.5Not available | Qwen3.5 PlusNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | GPT-5.5Not available | Qwen3.5 PlusNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | GPT-5.51M | Qwen3.5 Plus1M | Listed context windows are equal. |
Benchmark Deep Dive
Agentic24 benchmarks
| Benchmark | GPT-5.5 | Qwen3.5 Plus | Result |
|---|---|---|---|
| Terminal-Bench 2.0Source | 82% | — | Not comparable |
| CyberGymSource | 81.8% | — | Not comparable |
| BrowseCompSource | 84.4% | — | Not comparable |
| OSWorld-VerifiedSource | 78.7% | — | Not comparable |
| MCP AtlasSource | 75.3% | — | Not comparable |
| ToolathlonSource | 55.6% | — | Not comparable |
| τ²-bench resultsSource | 93.9% | — | Not comparable |
| AA Agentic IndexSource | 44.9% | — | Not comparable |
| APEX-Agents-AASource | 37.7% | — | Not comparable |
| GDPval-AASource | 49.5% | — | Not comparable |
| GDPval-AASource | 1490 | — | Not comparable |
| Gert LabsSource | 72.93% | — | Not comparable |
| ResearchClawBenchSource | 17.0% | — | Not comparable |
| OSWorld 2.0Source | 13.0% | — | Not comparable |
| JobBenchSource | 42.7% | 18.5% | GPT-5.5 leads |
| ExploitGymSource | 13.4% | — | Not comparable |
| AA BriefcaseSource | 1154 | — | Not comparable |
| AA AutomationBenchSource | 42.1% | — | Not comparable |
| AA EnterpriseOps-GymSource | 46.6% | — | Not comparable |
| AA Harvey LABSource | 86.3% | — | Not comparable |
| AA ITBenchSource | 45.8% | — | Not comparable |
| AA Tau3 BankingSource | 31.3% | — | Not comparable |
| terminalBenchHardSource | 60.6% | — | Not comparable |
| aaTerminalBench21Source | 84.3% | — | Not comparable |
Coding9 benchmarks
| Benchmark | GPT-5.5 | Qwen3.5 Plus | Result |
|---|---|---|---|
| SWE-bench ProSource | 58.6% | — | Not comparable |
| Terminal-Bench 2.0Source | 82.0% | — | Not comparable |
| Vibe Code BenchSource | 69.85% | 15.74% | GPT-5.5 leads |
| React Native EvalsSource | 84.7% | — | Not comparable |
| cursorBench31Source | 59.2% | — | Not comparable |
| cursorBench32Source | 58.4% | — | Not comparable |
| AA Coding IndexSource | 74.9% | — | Not comparable |
| AA-SciCodeSource | 56.1% | — | Not comparable |
| FrontierCode 1.1 MainSource | 43.0% | — | Not comparable |
Reasoning5 benchmarks
Knowledge10 benchmarks
| Benchmark | GPT-5.5 | Qwen3.5 Plus | Result |
|---|---|---|---|
| GPQASource | 93.6% | — | Not comparable |
| GPQA-DSource | 93.6% | — | Not comparable |
| HLESource | 52.2% | — | Not comparable |
| HLE w/o toolsSource | 41.4% | — | Not comparable |
| Artificial Analysis Intelligence IndexSource | 54.8% | — | Not comparable |
| AA-GPQA DiamondSource | 93.5% | — | Not comparable |
| AA-HLESource | 44.3% | — | Not comparable |
| AA-Omniscience IndexSource | 20.1% | — | Not comparable |
| AA-Omniscience AccuracySource | 56.9% | — | Not comparable |
| AA-Omniscience Hallucination RateSource | 85.5% | — | Not comparable |
MathGPT-5.5 wins3 benchmarks
Multimodal5 benchmarks
Inst. Following1 benchmarks
| Benchmark | GPT-5.5 | Qwen3.5 Plus | Result |
|---|---|---|---|
| AA-IFBenchSource | 75.9% | — | Not comparable |
Frequently Asked Questions (2)
Which is better, GPT-5.5 or Qwen3.5 Plus?
GPT-5.5 is ahead on BenchLM's BenchAlign leaderboard, 73.51 to 47.2. The biggest single separator in this matchup is FrontierMath v2 (Tier 4), where the scores are 35.400% and 2.083%.
Which is better for math, GPT-5.5 or Qwen3.5 Plus?
GPT-5.5 has the edge for math in this comparison, averaging 47.6 versus 16.3. Inside this category, FrontierMath v2 (Tier 4) is the benchmark that creates the most daylight between them.
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