Model profile
GPT-5.5 Pro
Evidence coverage
7 of 323 tracked benchmarks are published. 6 are verified and 1 provisional. 4 of 8 categories are measured.
- Published / tracked
- 7 / 323
- Verified
- 6
- Provisional
- 1
- Categories with evidence
- 4 / 8
Evidence by category
- Agentic1 benchmarkVerified
- Coding0 benchmarksNot measured
- Reasoning1 benchmarkReported
- Knowledge2 benchmarksVerified
- Math3 benchmarksVerified
- Multilingual0 benchmarksNot measured
- Multimodal0 benchmarksNot measured
- Inst. Following0 benchmarksNot measured
GPT-5.5 Pro ranks #38 out of 200 models on the public leaderboard with an overall score of 63.69/100. It does not yet have enough sourced coverage for BenchLM's verified leaderboard. While not a frontier model, it offers specific advantages depending on the use case.
GPT-5.5 Pro is a proprietary model with a 1M token context window. It uses explicit chain-of-thought reasoning, which typically improves performance on math and complex reasoning tasks at the cost of higher latency and token usage.
GPT-5.5 Pro sits inside the GPT-5.5 family alongside GPT-5.5. This profile currently has 7 of 323 tracked benchmarks. BenchLM only exposes non-generated benchmark rows publicly, so missing categories stay blank until a sourced evaluation is available.
Its strongest category is Agentic (#11). This performance profile makes it particularly useful for coding agents, browser research, and computer-use workflows.
Peer position
Exact provisional scores and ranks for the closest listed peers. A score can appear before a model clears the evidence threshold for a rank, so equal scores can have different rank states.
Range 63.15–64.22
- Claude Opus 4.5AnthropicCompare#3464.22Claude Opus 4.5 is #34 with a score of 64.22.
- Claude Opus 4.6 (Adaptive)AnthropicCompare#3564.18Claude Opus 4.6 (Adaptive) is #35 with a score of 64.18.
- MiniMax M2.7MiniMaxCompare#3664.11MiniMax M2.7 is #36 with a score of 64.11.
- GLM-5.2Z.AICompare#3763.96GLM-5.2 is #37 with a score of 63.96.
- GPT-5.5 ProCurrent modelOpenAI#3863.69GPT-5.5 Pro is #38 with a score of 63.69.
- GLM-5V-TurboZ.AICompare#3963.5GLM-5V-Turbo is #39 with a score of 63.5.
- MiMo-V2-OmniXiaomiCompare#4063.15MiMo-V2-Omni is #40 with a score of 63.15.
Category percentile
More
Relative position among models eligible for each sourced category. A higher percentile means a stronger position within that category's ranked cohort; 100 is highest.
- Agentic92%Eligible cohort rank #11 of 119Category score 60.5
Category evidence
Scores and ranks appear only where this model has published benchmark evidence. Categories without displayable source records remain not measured.
| Category | Score | Rank | Percentile | Weight | Benchmarks | Evidence |
|---|---|---|---|---|---|---|
| AgenticRank #11 of 119Percentile 92ndWeight 22%1 benchmarkVerified | 60.5 | #11 of 119 | 92nd | 22% | 1 benchmark | Verified |
| CodingWeight 20%0 benchmarksNot measured | Not measured | Not ranked | Not available | 20% | 0 benchmarks | Not measured |
| ReasoningWeight 17%1 benchmarkReported | Score pending | Not ranked | Not available | 17% | 1 benchmark | Reported |
| KnowledgeRank Not rankedWeight 12%2 benchmarksVerified | 90.9 | Not ranked | Not available | 12% | 2 benchmarks | Verified |
| MathRank Not rankedWeight 5%3 benchmarksVerified | 72.1 | Not ranked | Not available | 5% | 3 benchmarks | Verified |
| MultilingualWeight 7%0 benchmarksNot measured | Not measured | Not ranked | Not available | 7% | 0 benchmarks | Not measured |
| MultimodalWeight 12%0 benchmarksNot measured | Not measured | Not ranked | Not available | 12% | 0 benchmarks | Not measured |
| Inst. FollowingWeight 5%0 benchmarksNot measured | Not measured | Not ranked | Not available | 5% | 0 benchmarks | Not measured |
Benchmark Details
Rows below have a displayable published verification record. Each source link and provenance note remains in the page HTML while its category is closed. Source-unverified manual rows and generated rows stay hidden.
Agentic1 benchmark
Reasoning1 benchmark
Critical Physics Tasks
Knowledge2 benchmarks
Humanity's Last Exam
Humanity's Last Exam without tools
Math3 benchmarks
FrontierMath v2 Tiers 1-3
FrontierMath v2 Tier 4
FrontierMath legacy aggregate
Frequently Asked Questions
How does GPT-5.5 Pro perform overall in AI benchmarks?
GPT-5.5 Pro has 7 published benchmark scores on BenchLM, but it does not yet have enough non-generated coverage to receive a global overall rank.
Is GPT-5.5 Pro good for knowledge and understanding?
GPT-5.5 Pro has visible benchmark coverage in knowledge and understanding, but BenchLM does not currently assign it a global category rank there.
Is GPT-5.5 Pro good for mathematics?
GPT-5.5 Pro has visible benchmark coverage in mathematics, but BenchLM does not currently assign it a global category rank there.
Is GPT-5.5 Pro good for reasoning and logic?
GPT-5.5 Pro has visible benchmark coverage in reasoning and logic, but BenchLM does not currently assign it a global category rank there.
Is GPT-5.5 Pro good for agentic tool use and computer tasks?
GPT-5.5 Pro ranks #11 out of 119 models in agentic tool use and computer tasks benchmarks with an average score of 60.5. There are stronger options in this category.
Which sibling models are related to GPT-5.5 Pro?
GPT-5.5 Pro belongs to the GPT-5.5 family. Related variants on BenchLM include GPT-5.5.
Does GPT-5.5 Pro have full benchmark coverage on BenchLM?
Not yet. GPT-5.5 Pro currently has 7 published benchmark scores out of the 323 benchmarks BenchLM tracks. BenchLM only exposes non-generated public benchmark rows, so missing categories stay blank until a sourced evaluation is available.
What is the context window size of GPT-5.5 Pro?
GPT-5.5 Pro has a published context window of 1M, which determines how much text it can process in a single interaction.
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