Inference360
OpenAI

GPT-5.5 Codex

GPT-5.5 Codex is a model from OpenAI. 4 benchmarks count toward its score, in 2 categories.

partialShows if the model has enough results for an index.
IndexOverall score out of 100.Unranked
CoverageShare of the index weight with results.40%
SpeedOutput tokens per second.—
Input / 1MUS dollars per 1M input tokens.N/A
Output / 1MUS dollars per 1M output tokens.N/A
ContextMaximum tokens in one request.N/A
EloLMArena rating and rank.N/A

The index is a score out of 100. The ± range shows how much it can change.

CapabilitiesScore per category, out of 100.

Out of 100
AgenticMulti-step tasks with tools.
57.9
CodingCode writing and repair.
67.1
ReasoningLogic problems and puzzles.
N/A
MultimodalTasks with images and text.
N/A
KnowledgeFacts and expert knowledge.
N/A
MultilingualTasks in many languages.
N/A
InstructionTasks with strict rules in the prompt.
N/A
MathMath problems.
N/A

Results

4 counted
BenchmarkThe test name.CategoryThe capability that the test measures.ResultThe score from the publisher.IndexThis result as a score out of 100.RunThe settings of the run.DateDate of the result.Published byThe source of the result.
SWE-benchCoding76.4%58.8Codex1 Sept 2026Vals AI
SkillsBenchCoding62.6%76.0Codex11 Sept 2026Vals AI
Vibe Code Bench v1.1Coding58.2%66.4Codex21 Sept 2026Vals AI
Terminal-Bench 2.1Agentic57.3%57.9Codex21 Sept 2026Vals AI

4 benchmarks count, from 4 of 4 results. A grey row does not count. Too few models took that benchmark.

Sources

BenchLM benchmark aggregationUsed with attribution; per-benchmark results credited to their original authorsVals AI, collected directlyNo licence stated. Read from the public leaderboard and credited to Vals AI

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