Model comparison
GPT-5.5 vs Solar Pro 2
Head-to-head evidence from 11 shared benchmark results across 5 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: GPT-5.5 #9 (Estimated); Solar Pro 2 #167 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. GPT-5.5 and Solar Pro 2 share 11 comparable benchmark results. 0 of 8 categories are comparable. 46 results are unique to GPT-5.5; 0 to Solar Pro 2.
Updated July 22, 2026- Shared results
- 11
- GPT-5.5 only
- 46
- Solar Pro 2 only
- 0
- Comparable categories
- 0 / 8
Benchmark data for GPT-5.5 and Solar Pro 2 is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 11 shared benchmark results across 5 evidence categories; 0 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
BenchLM has partial data for these models, but not enough overlapping benchmark coverage to produce a fair score-level comparison yet.
GPT-5.5 has the larger context window at 1M, compared with 128K for Solar Pro 2.
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 | Solar Pro 2 |
|---|---|---|---|
| Agentic | GPT-5.581.6 | MarginNo overlap | Solar Pro 2Not measured |
| Coding | GPT-5.558.6 | MarginNo overlap | Solar Pro 2Not measured |
| Reasoning | GPT-5.585.0 | MarginNo overlap | Solar Pro 2Not measured |
| Knowledge | GPT-5.557.8 | MarginNo overlap | Solar Pro 2Not measured |
| Math | GPT-5.547.6 | MarginNo overlap | Solar Pro 2Not measured |
| Multimodal | GPT-5.570.4 | MarginNo overlap | Solar Pro 2Not measured |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | GPT-5.5 | Solar Pro 2 | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | GPT-5.5$5 input / $30 output | Solar Pro 2Not available | A complete price comparison is not available. |
| Generation speedtokens per second | GPT-5.5Not available | Solar Pro 2Not available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | GPT-5.5Not available | Solar Pro 2Not available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | GPT-5.51M | Solar Pro 2128K | GPT-5.5 lists the larger context window. |
Benchmark Deep Dive
Agentic24 benchmarks
| Benchmark | GPT-5.5 | Solar Pro 2 | 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% | 31.9% | GPT-5.5 leads |
| 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% | — | Not comparable |
| 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 | Solar Pro 2 | Result |
|---|---|---|---|
| SWE-bench ProSource | 58.6% | — | Not comparable |
| Terminal-Bench 2.0Source | 82.0% | — | Not comparable |
| Vibe Code BenchSource | 69.85% | — | Not comparable |
| 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% | 24.8% | GPT-5.5 leads |
| FrontierCode 1.1 MainSource | 43.0% | — | Not comparable |
Reasoning5 benchmarks
Knowledge10 benchmarks
| Benchmark | GPT-5.5 | Solar Pro 2 | 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% | 7.8% | GPT-5.5 leads |
| AA-GPQA DiamondSource | 93.5% | 56.1% | GPT-5.5 leads |
| AA-HLESource | 44.3% | 3.8% | GPT-5.5 leads |
| AA-Omniscience IndexSource | 20.1% | -61.7% | GPT-5.5 leads |
| AA-Omniscience AccuracySource | 56.9% | 15.6% | GPT-5.5 leads |
| AA-Omniscience Hallucination RateSource | 85.5% | 91.5% | GPT-5.5 leads |
Math3 benchmarks
Multimodal5 benchmarks
Inst. Following1 benchmarks
| Benchmark | GPT-5.5 | Solar Pro 2 | Result |
|---|---|---|---|
| AA-IFBenchSource | 75.9% | 33.7% | GPT-5.5 leads |
Frequently Asked Questions (3)
Can I compare GPT-5.5 and Solar Pro 2 on BenchLM yet?
Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.
Why does this comparison show “coming soon”?
BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.
What data is available for GPT-5.5 and Solar Pro 2 today?
GPT-5.5: $5.00 input / $30.00 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.
Related Comparisons
Explore More
Choose a model with this week’s evidence
Join 2,000+ readers for ranking moves, pricing changes, and the claims that still need proof.
One email each week. Unsubscribe anytime.