GPT-5.5
openai/gpt-5.5- OpenAI
- Family · GPT-5
- Released 23 Apr 2026
- File · Image · Text → Text
- Reasoning · adjustable
- Tools · JSON · Vision
Spec & list price
Context1M
Max output128K
Input / 1M$5.00
Output / 1M$30.006× input
Scores · standing
Intelligence38.4#42/489
Coding74.9#13/196
Usage
Tokens / day3.7B▼ 32% 7d
Usage rank#134
Requests / day658.7K
Tool calls / req0.18
Per request · 30 days
Avg input14.0Kabout median
Avg output5290.8× median
Cache hit74%about median
Reasoning share53%about median
Tool-call failures1.2%0.6× median
Consumption
Peak 21.6B 9 OctLow 1.8B 1 NovRank today #134
News & trends
31 mentions this week ▲ 72%this model · videos, posts, articles · 30 days
Trending · 14 days
- The Current Models: GPT-5.5 & GPT-5.6 (Sol, Terra, Luna) | ChatGPT 2026 (Ep. 4)7.9K views
- @ArtificialAnlys on X43.1K views
- GitHub Copilot GPT-5.5 Gone? Keep Your Workflow Working 🔄🦛368 views
News · latest from OpenAI
- Chinese labs now target OpenAI's GPT-6 Astra for distillationfork.zone · 1 Nov
- GPT-6.1 Terrasimonwillison.net · 31 Oct
- GPT-5.6 Sol can beat Factorio on peaceful moderyanmadden.net · 31 Oct
- Post-training 4B model with RL to fly Tesla Roadster 21% better than GPT-6 Astraskypilot.ai · 30 Oct
Benchmarks
bar = share of the top score · Benchmark data: Artificial AnalysisSpeed · median across 4 providers, latest day
Output speed#88/33495 tok/s1.4× faster than median
Fastest provider158 tok/sbest of 4 providers
First token#2581.94 s1.9× longer than median
#16 cheapest of 16 with a similar score
Value
Intelligence Index
Blended price per 1M tokens (log)
Family progress
Intelligence Index
- Family releases38.4
Technical details
- Reasoning
- on · medium
- Tokenizer
- GPT
- Knowledge cutoff
- 2025-12-01
- Moderation
- moderated
Reasoning effort
- xhigh
- high
- medium · default
- low
- none
Request parameters 11
- tools
- tool_choice
- response_format
- structured_outputs
- reasoning
- reasoning_effort
- include_reasoning
- max_tokens
- max_completion_tokens
- seed
+1 more
- verbosity
Interesting facts
- Released 193 days ago, the newest of 5 GPT-5 models.
- 2nd of 5 GPT-5 models by tokens last month.
When to use
Best for
- Coding agents on demanding repositories
- Terminal and tool-heavy automation
- Science and reasoning research
- Very long document analysis
- Image and file understanding
Think twice for
- Long autonomous agent runs
- New projects (usage is declining)
- High-volume simple chat (cheaper options exist)
- Self-hosting (closed weights)
Research papers
- Assessing AI Companion Chatbot Safety for Vulnerable Users: A Crisis-Stage Multi-Platform Evaluation29 Oct
- ARBITRA: Robust Document-Level ATT&CK Extraction via Multi-Expert Argumentation29 Oct
- M4Bench: Evaluating Procedural Specification for Clinical EHR Derivation Agents27 Oct
- Hierarchical Skill Evolution for Coding Agent26 Oct
- Higher Reasoning Effort Improves Reference Verifiability and Changes Reasoning Summaries in GPT-5.525 Oct
- IGG: A Benchmark for Interactive GUI Grounding under Visibility Constraints23 Oct
- Correct Answers, Closed Gates: SolveBind for GUI Agents at the Verification Barrier23 Oct
- RSI-Opt: Recursive Self-Improvement Optimizer Agents For Model Training23 Oct
Social
Most watched and discussed · 90 days
- The Current Models: GPT-5.5 & GPT-5.6 (Sol, Terra, Luna) | ChatGPT 2026 (Ep. 4)Snob Bots · 7.9K views · 29 Oct
- GitHub Copilot GPT-5.5 Gone? Keep Your Workflow Working 🔄🦛CodeHippo | AI Coding Tools Daily · 368 views · 20 Oct
- GLM-5.2: Open-Weight AI Takes on GPT-5.5 #shortsVengoAI · 331 views · 1 Nov
- GitHub Copilot drops GPT-5.5 and five other models, plus 7 more AI updatesVoidBrief · 186 views · 20 Oct
- Agent S4: A 27B Model Beat GPT-5.5 at Using a PC #shortsNEURAL DROP · 160 views · 25 Oct
- Inside the GPT-5.5 System CardNXThink · 155 views · 31 Oct
- 작은 AI가 GPT-5.5를 이겼다, 모델이 아니라 '도구'를 스스로 고쳐서 #ShortsAI시대 나침반 · 126 views · 29 Oct
- This Open Qwen Just Beat GPT-5.5 at CodingZeroToAI · 118 views · 30 Oct
- GPT-5.5終了でCodexが止まった！公式の乗り換え先もうちでは通らなかったAIで自動で動画を作る工場 · 102 views · 24 Oct
- Perang AI Terpanas! Claude 5.5 vs GPT-5.5 Siapa Menang? #ShortsAnzelstech · 96 views · 23 Oct
- GitHub Copilot removes GPT-5.5, GPT-5.4 and four more modelsJys on tech · 40 views · 29 Oct
- Kritische Schwachstellen in GPT-5.5 gefunden ⚠️KI NEWS RADAR DE · 32 views · 28 Oct
Same family
GPT-5- 23.0
- 39.0
- 30.4
- 24.7
Alternatives
other vendors · similar capability- 38.2
- 41.8
- 38.8
- 39.9
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