Model profile
GPT-5.1-Codex-Max
Evidence coverage
13 of 321 tracked benchmarks are published. 1 is verified and 12 provisional. 6 of 8 categories are measured.
- Published / tracked
- 13 / 321
- Verified
- 1
- Provisional
- 12
- Categories with evidence
- 6 / 8
Evidence by category
- Agentic1 benchmarkReported
- Coding2 benchmarksMixed evidence
- Reasoning2 benchmarksReported
- Knowledge6 benchmarksReported
- Math0 benchmarksNot measured
- Multilingual0 benchmarksNot measured
- Multimodal1 benchmarkReported
- Inst. Following1 benchmarkReported
GPT-5.1-Codex-Max ranks #90 out of 200 models on the public leaderboard with an overall score of 54.48/100. 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-5.1-Codex-Max 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 13 of 321 tracked benchmarks. BenchLM only exposes non-generated benchmark rows publicly, so missing categories stay blank until a sourced evaluation is available.
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 53.95–55.1
- Step 3.5 FlashStepFunCompare#8655.1Step 3.5 Flash is #86 with a score of 55.1.
- Kimi K2.7 CodeMoonshot AICompare#8755.0Kimi K2.7 Code is #87 with a score of 55.0.
- Grok 4.20xAICompare#8854.68Grok 4.20 is #88 with a score of 54.68.
- DeepSeek LLM 2.0DeepSeekCompare#8954.53DeepSeek LLM 2.0 is #89 with a score of 54.53.
- GPT-5.1-Codex-MaxCurrent modelOpenAI#9054.48GPT-5.1-Codex-Max is #90 with a score of 54.48.
- MiMo-V2-FlashXiaomiCompare#9154.06MiMo-V2-Flash is #91 with a score of 54.06.
- DeepSeek V4 Flash (High)DeepSeekCompare#9253.95DeepSeek V4 Flash (High) is #92 with a score of 53.95.
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.
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 Not rankedWeight 22%1 benchmarkReported | 83.4 | Not ranked | Not available | 22% | 1 benchmark | Reported |
| CodingRank Not rankedWeight 20%2 benchmarksMixed sources | 70.2 | Not ranked | Not available | 20% | 2 benchmarks | Mixed sources |
| ReasoningRank Not rankedWeight 17%2 benchmarksReported | 91.3 | Not ranked | Not available | 17% | 2 benchmarks | Reported |
| KnowledgeRank Not rankedWeight 12%6 benchmarksReported | 60.4 | Not ranked | Not available | 12% | 6 benchmarks | Reported |
| MathWeight 5%0 benchmarksNot measured | Not measured | Not ranked | Not available | 5% | 0 benchmarks | Not measured |
| MultilingualWeight 7%0 benchmarksNot measured | Not measured | Not ranked | Not available | 7% | 0 benchmarks | Not measured |
| MultimodalRank Not rankedWeight 12%1 benchmarkReported | 87.8 | Not ranked | Not available | 12% | 1 benchmark | Reported |
| Inst. FollowingRank Not rankedWeight 5%1 benchmarkReported | 91.0 | Not ranked | Not available | 5% | 1 benchmark | Reported |
Chatbot Arena performance
Scroll horizontally to inspect confidence intervals and vote counts.
| View | Elo | Confidence interval | Votes |
|---|---|---|---|
| Text Overall | 1349 | Not available | Not available |
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
τ²-Bench Tool-Agent-User Evaluation
Coding2 benchmarks
Vibe Code Bench v1.1
Artificial Analysis SciCode
Reasoning2 benchmarks
Artificial Analysis Long Context Reasoning
Critical Physics Tasks
Knowledge6 benchmarks
Artificial Analysis GPQA Diamond
Artificial Analysis Humanity's Last Exam
Artificial Analysis Omniscience Index
Artificial Analysis Omniscience Accuracy
Artificial Analysis Omniscience Hallucination Rate
Multimodal1 benchmark
Artificial Analysis MMMU-Pro
Inst. Following1 benchmark
Artificial Analysis IFBench
Frequently Asked Questions
How does GPT-5.1-Codex-Max perform overall in AI benchmarks?
GPT-5.1-Codex-Max has 13 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-Max good for knowledge and understanding?
GPT-5.1-Codex-Max 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-Max good for coding and programming?
GPT-5.1-Codex-Max 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-Max good for reasoning and logic?
GPT-5.1-Codex-Max 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-Max good for agentic tool use and computer tasks?
GPT-5.1-Codex-Max 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-Max good for multimodal and grounded tasks?
GPT-5.1-Codex-Max 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-Max good for instruction following?
GPT-5.1-Codex-Max has visible benchmark coverage in instruction following, but BenchLM does not currently assign it a global category rank there.
Does GPT-5.1-Codex-Max have full benchmark coverage on BenchLM?
Not yet. GPT-5.1-Codex-Max currently has 13 published benchmark scores out of the 321 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-Max?
GPT-5.1-Codex-Max has a published context window of 400K, which determines how much text it can process in a single interaction.
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