Rankings / Unknown
GPT 5.1 Codex
released 2025-11-13
BenchAtlas Index
as of 2026-07-14
high effort
rank #113
10 families · 5 categories · high
Benchmark evidence
11 results
agentic coding
| τ²-Bench | high effort | 83.0 % | independent | Artificial Analysis |
coding
| LiveCodeBench v6 implementation=artificial-analysis | high effort | 84.9 % | independent | Artificial Analysis |
| SciCode | high effort | 40.2 % | independent | Artificial Analysis |
external indices
| Intelligence Index v4.1 | high effort | 34.7 points | independent | Artificial Analysis |
| AA Math Index | high effort | 95.7 points | independent | Artificial Analysis |
knowledge science
| GPQA Diamond implementation=artificial-analysis | high effort | 86.0 % | independent | Artificial Analysis |
| Humanity's Last Exam implementation=artificial-analysis | high effort | 23.4 % | independent | Artificial Analysis |
| MMLU-Pro implementation=artificial-analysis | high effort | 86.0 % | independent | Artificial Analysis |
long context instruction
| AA-LCR | high effort | 67.3 % | independent | Artificial Analysis |
| IFBench | high effort | 70.0 % | independent | Artificial Analysis |
reasoning math
| AIME year=2025 · implementation=artificial-analysis | high effort | 95.7 % | independent | Artificial Analysis |
Agent + model results
systems, not bare-model scores
| agent + model mini-SWE-agent + GPT 5.1 Codex | SWE-bench Verified | 66.0 % | unverified | SWE-bench Leaderboard |
| agent + model mini-SWE-agent + GPT 5.1 Codex | SWE-bench bash-only | 66.0 % | unverified | SWE-bench Leaderboard |
| agent + model mini-SWE-agent + GPT 5.1 Codex | SWE-bench Verified | 0.6 usd_per_task | unverified | SWE-bench Leaderboard |
| agent + model mini-SWE-agent + GPT 5.1 Codex | SWE-bench bash-only | 0.6 usd_per_task | unverified | SWE-bench Leaderboard |
| agent + model Crux + GPT 5.1 Codex | Terminal-Bench 2.0 | 57.8 % | community | Terminal-Bench Leaderboard |
| agent + model letta-code + GPT 5.1 Codex | Terminal-Bench 2.0 | 53.5 % | unverified | Terminal-Bench Leaderboard |
| agent + model terminus-2 + GPT 5.1 Codex | Terminal-Bench 2.0 | 36.9 % | community | Terminal-Bench Leaderboard |
| agent + model Artificial Analysis harness + GPT 5.1 Codex | Terminal-Bench Hard | 34.9 % | independent | Artificial Analysis |
These scores measure the whole agent system (scaffold, tools, budgets) — they are never merged into the bare model’s numbers.