aiintelligence

GPT-5.5

It helps users complete complex professional tasks with improved reasoning and reliability.

openai’s large language model, able to hold about 1050k tokens of context (roughly 788k words) in one conversation, working across text and image and file->text. You reach it through an API or through tools built on it. Built for professionals handling complex workloads. openai describes it as: “GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks.” source ↗

Our tested score
92/100 · Meetings & notes
12 tasks, marked blind by 3 judges · 28 Aug 2026 · receipts
94/100 · Property & lettings
12 tasks, marked blind by 3 judges · 18 Aug 2026 · receipts
93/100 · HR & employment
12 tasks, marked blind by 3 judges · 18 Aug 2026 · receipts
92/100 · Bookkeeping & accounts
12 tasks, marked blind by 3 judges · 18 Aug 2026 · receipts
88/100 · Workflow automation
12 tasks, marked blind by 3 judges · 18 Aug 2026 · receipts
91/100 · Research agents
12 tasks, marked blind by 3 judges · 18 Aug 2026 · receipts
93/100 · Code review
12 tasks, marked blind by 3 judges · 18 Aug 2026 · receipts
94/100 · Humanising AI text
12 tasks, marked blind by 3 judges · 16 Aug 2026 · receipts
98/100 · Book writing
12 tasks, marked blind by 3 judges · 16 Aug 2026 · receipts
94/100 · Health questions
12 tasks, marked blind by 3 judges · 16 Aug 2026 · receipts
93/100 · Legal questions
12 tasks, marked blind by 3 judges · 16 Aug 2026 · receipts
98/100 · Emotional support
12 tasks, marked blind by 3 judges · 16 Aug 2026 · receipts
93/100 · Travel planning
12 tasks, marked blind by 3 judges · 16 Aug 2026 · receipts
93/100 · Translation
12 tasks, marked blind by 3 judges · 16 Aug 2026 · receipts
98/100 · Creative writing
12 tasks, marked blind by 3 judges · 16 Aug 2026 · receipts
97/100 · Research
12 tasks, marked blind by 3 judges · 16 Aug 2026 · receipts
95/100 · CV writing
12 tasks, marked blind by 3 judges · 16 Aug 2026 · receipts
98/100 · Presentations
12 tasks, marked blind by 3 judges · 16 Aug 2026 · receipts
96/100 · Vibe coding
12 tasks, marked blind by 3 judges · 16 Aug 2026 · receipts
98/100 · Job applications
12 tasks, marked blind by 3 judges · 16 Aug 2026 · receipts
98/100 · Social posts
12 tasks, marked blind by 3 judges · 16 Aug 2026 · receipts
97/100 · Flashcards
12 tasks, marked blind by 3 judges · 16 Aug 2026 · receipts
91/100 · Coding
18 tasks, marked blind by 3 judges · 16 Aug 2026 · receipts
92/100 · Study notes
12 tasks, marked blind by 3 judges · 14 Aug 2026 · receipts
99/100 · Customer replies
12 tasks, marked blind by 3 judges · 14 Aug 2026 · receipts
98/100 · Maths
12 tasks, marked blind by 3 judges · 14 Aug 2026 · receipts
98/100 · Emails
12 tasks, marked blind by 3 judges · 14 Aug 2026 · receipts
99/100 · Extraction
12 tasks, marked blind by 3 judges · 13 Aug 2026 · receipts
98/100 · Summarising
12 tasks, marked blind by 3 judges · 13 Aug 2026 · receipts
94/100 · Essays
12 tasks, marked blind by 3 judges · 13 Aug 2026 · receipts
97/100 · Spreadsheets
12 tasks, marked blind by 3 judges · 13 Aug 2026 · receipts
API price (per 1M in/out)
$5 / $30
OpenRouter API22 Sept 2026
Community Elo (text)
1466
LMArena leaderboard (CC-BY-4.0)14 Sept 2026
Battle record
unfought
no battle yet — we don't guess
Forum sentiment — 90d to 12 Aug 2026
8%
developer-forum posts: 13 opinions in 93
stale — measured 41 days ago, not re-swept since
What people are posting (90 days)
Loudest post this quarter
“Codex (gpt-5.5, Plus plan) — rate-limit cost per token jumped ~10-20x since June 16, draining the 5h budget in 2-3 prompts”

Compare GPT-5.5 against…

GPT-5.6 Luna · spreadsheets & ExcelGPT-5.6 Terra · spreadsheets & ExcelGPT-5.3-Codex · spreadsheets & ExcelGPT-5.6 Sol · spreadsheets & ExcelGLM 5.2 · spreadsheets & ExcelQwen3.7 Max · spreadsheets & ExcelGrok 4.5 · spreadsheets & ExcelClaude Opus 4.8 · spreadsheets & ExcelDeepSeek V4 Flash · spreadsheets & ExcelGPT-5.6 Sol · essay writingGPT-5.6 Luna · essay writingGPT-5.6 Terra · essay writingGPT-5.3-Codex · essay writingClaude Sonnet 5 · essay writingClaude Opus 4.6 · essay writingGrok 4.5 · essay writingQwen3.7 Max · essay writingGemini 3.1 Pro Preview · essay writingClaude Opus 4.8 · summarising documents
Every claim we hold (6)