GPT-5.4 vs GPT-5.5 Instant
As of Oct 14, 2026, GPT-5.4 leads GPT-5.5 Instant in 5 of 5 shared categories: General LLM, Reasoning, Science, Long context, and Factuality.
GPT-5.4
It used to be. Was SOTA in General LLM.
GPT-5.5 Instant
#31 Best current rank: #31 in General LLM, as of Oct 14, 2026.
| Category | GPT-5.4 | GPT-5.5 Instant |
|---|---|---|
| General LLM | #28 · Was SOTA · General LLM Margin 19.04761904761905 LMArena leaderboard dataset · Oct 13, 2026 | #31 · #31 in General LLM Margin 21.088435374149654 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #29 · #29 in Reasoning Margin 20.54794520547945 LMArena leaderboard dataset · Oct 13, 2026 | #33 · #33 in Reasoning Margin 23.28767123287672 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #9 · #9 in Math Margin 17.777777777777757 Epoch AI benchmarking hub · Mar 5, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #16 · #16 in Science Margin — Epoch AI benchmarking hub · Mar 5, 2026 | #65 · #65 in Science Margin — Epoch AI benchmarking hub · May 5, 2026 |
| Coding | #— · Not enough data Margin — Epoch AI benchmarking hub · Mar 5, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Web dev | #55 · #55 in Coding › Web dev Margin 50.467289719626166 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #34 · #34 in Long context Margin 23.12925170068027 LMArena leaderboard dataset · Oct 13, 2026 | #39 · #39 in Long context Margin 26.530612244897952 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #6 · Was SOTA · Factuality Margin 5.22388059701494 LMArena leaderboard dataset · Oct 13, 2026 | #64 · #64 in Factuality Margin 48.507462686567166 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #10 · #10 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Mar 5, 2026 | — |
GPT-5.4: $5.625 per 1M blended tokens.
GPT-5.5 Instant: price per 1M tokens is unset in the catalog.
GPT-5.4: closed weights.
GPT-5.5 Instant: closed weights.
General LLM: As of Oct 14, 2026, GPT-5.4 leads GPT-5.5 Instant in General LLM at #28 against #31.
Reasoning: As of Oct 14, 2026, GPT-5.4 leads GPT-5.5 Instant in Reasoning at #29 against #33.
Science: As of Oct 14, 2026, GPT-5.4 leads GPT-5.5 Instant in Science at #16 against #65.
Long context: As of Oct 14, 2026, GPT-5.4 leads GPT-5.5 Instant in Long context at #34 against #39.
Factuality: As of Oct 14, 2026, GPT-5.4 leads GPT-5.5 Instant in Factuality at #6 against #64.
GPT-5.4 or GPT-5.5 Instant?
As of Oct 14, 2026, GPT-5.4 leads GPT-5.5 Instant in 5 of 5 shared categories: General LLM, Reasoning, Science, Long context, and Factuality.
GPT-5.4 or GPT-5.5 Instant for General LLM?
As of Oct 14, 2026, GPT-5.4 leads GPT-5.5 Instant in General LLM at #28 against #31.
GPT-5.4 or GPT-5.5 Instant for Reasoning?
As of Oct 14, 2026, GPT-5.4 leads GPT-5.5 Instant in Reasoning at #29 against #33.
GPT-5.4 or GPT-5.5 Instant for Science?
As of Oct 14, 2026, GPT-5.4 leads GPT-5.5 Instant in Science at #16 against #65.