GPT-5.1-Codex
BenchLM is tracking GPT-5.1-Codex, but this profile is currently excluded from the public leaderboard because it still lacks enough non-generated benchmark coverage to rank safely. Only non-generated public benchmark rows appear below.
GPT-5.1-Codex is a proprietary model with a 400K 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.
This profile currently has 19 of 225 tracked benchmarks. BenchLM only exposes non-generated benchmark rows publicly, so missing categories stay blank until a sourced evaluation is available.
Ranking Distribution
Category rank across 0 benchmark categories — sorted by best rank
Category Performance
Scores across all benchmark categories (0-100 scale)
Category Breakdown
Agentic
Coding
Reasoning
Knowledge
Math
Multilingual
Multimodal
Inst. Following
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-5.1-Codex perform overall in AI benchmarks?
GPT-5.1-Codex has 19 published benchmark scores on BenchLM, but it does not yet have enough non-generated coverage to receive a global overall rank.
Is GPT-5.1-Codex good for knowledge and understanding?
GPT-5.1-Codex has visible benchmark coverage in knowledge and understanding, but BenchLM does not currently assign it a global category rank there.
Is GPT-5.1-Codex good for coding and programming?
GPT-5.1-Codex has visible benchmark coverage in coding and programming, but BenchLM does not currently assign it a global category rank there.
Is GPT-5.1-Codex good for reasoning and logic?
GPT-5.1-Codex has visible benchmark coverage in reasoning and logic, but BenchLM does not currently assign it a global category rank there.
Is GPT-5.1-Codex good for agentic tool use and computer tasks?
GPT-5.1-Codex has visible benchmark coverage in agentic tool use and computer tasks, but BenchLM does not currently assign it a global category rank there.
Is GPT-5.1-Codex good for multimodal and grounded tasks?
GPT-5.1-Codex has visible benchmark coverage in multimodal and grounded tasks, but BenchLM does not currently assign it a global category rank there.
Is GPT-5.1-Codex good for instruction following?
GPT-5.1-Codex has visible benchmark coverage in instruction following, but BenchLM does not currently assign it a global category rank there.
Does GPT-5.1-Codex have full benchmark coverage on BenchLM?
Not yet. GPT-5.1-Codex currently has 19 published benchmark scores out of the 225 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-5.1-Codex?
GPT-5.1-Codex has a context window of 400K, which determines how much text it can process in a single interaction.
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