GPT-5.5 Instant

GPT-5.5 Instant is a model from OpenAI. 5 benchmarks count toward its score, in 3 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.1420 (#109)

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

25,850 votes. Elo shows what people prefer. It does not change the score.

CapabilitiesScore per category, out of 100.

Out of 100
AgenticMulti-step tasks with tools.
N/A
CodingCode writing and repair.
N/A
ReasoningLogic problems and puzzles.
39.0
MultimodalTasks with images and text.
N/A
KnowledgeFacts and expert knowledge.
54.4
MultilingualTasks in many languages.
N/A
InstructionTasks with strict rules in the prompt.
N/A
MathMath problems.
48.3

Results

5 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.
GPQA diamondKnowledge82.5%54.4Epoch AI
OTIS Mock AIME 2024-2025Math68.1%49.6Epoch AI
FrontierMath-Tiers-1-3-v2-PrivateMath26.3%46.3Epoch AI
Chess PuzzlesReasoning12.0%39.0Epoch AI
FrontierMath-Tier-4-v2-PrivateMath2.4%49.1Epoch AI

5 benchmarks count, from 5 of 5 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 authorsEpoch AI, collected directlyCC BY — free to use and redistribute with attribution

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