GPT-5.5
According to BenchLM.ai, GPT-5.5 ranks #3 out of 115 models on the provisional leaderboard with an overall score of 91/100. It also ranks #3 out of 23 on the verified leaderboard. This places it among the top tier of AI models available in 2026, competing directly with the strongest models from leading AI labs.
GPT-5.5 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 sits inside the GPT-5.5 family alongside GPT-5.5 Pro. BenchLM links it directly to GPT-5.4 as the earlier related model in that lineage. This profile currently has 22 of 193 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 (#2), while its weakest is Multimodal & Grounded (#53). This performance profile makes it particularly useful for coding agents, browser research, and computer-use workflows.
Ranking Distribution
Category rank across 6 benchmark categories — sorted by best rank
Category Performance
Scores across all benchmark categories (0-100 scale)
Category Breakdown
Agentic
#2Coding
Reasoning
Knowledge
Math
Multilingual
Multimodal
#53Inst. Following
Chatbot Arena Performance
Benchmark Details
Only benchmark rows with an attached exact-source record are shown here. Source-unverified manual rows and generated rows are hidden from model pages.
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Frequently Asked Questions
How does GPT-5.5 perform overall in AI benchmarks?
GPT-5.5 currently ranks #3 out of 115 models on BenchLM's provisional leaderboard with an overall score of 91. It also ranks #3 out of 23 on the verified leaderboard. It is created by OpenAI and features a 1M context window.
Is GPT-5.5 good for knowledge and understanding?
GPT-5.5 has visible benchmark coverage in knowledge and understanding, but BenchLM does not currently assign it a global category rank there.
Is GPT-5.5 good for coding and programming?
GPT-5.5 has visible benchmark coverage in coding and programming, but BenchLM does not currently assign it a global category rank there.
Is GPT-5.5 good for mathematics?
GPT-5.5 has visible benchmark coverage in mathematics, but BenchLM does not currently assign it a global category rank there.
Is GPT-5.5 good for reasoning and logic?
GPT-5.5 has visible benchmark coverage in reasoning and logic, but BenchLM does not currently assign it a global category rank there.
Is GPT-5.5 good for agentic tool use and computer tasks?
GPT-5.5 ranks #2 out of 115 models in agentic tool use and computer tasks benchmarks with an average score of 98.3. It is among the top performers in this category.
Is GPT-5.5 good for multimodal and grounded tasks?
GPT-5.5 ranks #53 out of 115 models in multimodal and grounded tasks benchmarks with an average score of 57.2. There are stronger options in this category.
Which sibling models are related to GPT-5.5?
GPT-5.5 belongs to the GPT-5.5 family. Related variants on BenchLM include GPT-5.5 Pro.
Does GPT-5.5 have full benchmark coverage on BenchLM?
Not yet. GPT-5.5 currently has 22 published benchmark scores out of the 193 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?
GPT-5.5 has a context window of 1M, which determines how much text it can process in a single interaction.
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